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| Gaston Berger Amphitheatre |
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DOPPELBAUER Martin - KIT - ETI - GERMANY
SECHILARIU Manuela - UTC - FRANCE |
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SECHILARIU Manuela - UTC - FRANCE
DOPPELBAUER Martin - KIT - ETI - GERMANY |
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LOKEN Rannveig(1)
(1)CIGRE - FRANCE |
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| Gaston Berger Amphitheatre |
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Chair(s):
ROBOAM Xavier - LAPLACE Université de Toulouse - FRANCE |
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| LS1a - Topic 9 - AC/DC and DC/AC Converter Topologies (I) |
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Chair(s):
HEGAZY Omar - Vrije Universiteit Brussel - BELGIUM
EL BAGHDADI Mohamed - Vrije Universiteit Brussel - BELGIUM |
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| 005 - Advanced DC Voltage Control Technique for Converters: Achieving Superior Speed and Stability with Model Predictive Control |
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ZEB Farrukh(1), POURESMAEIL Mobina(1), POURESMAEIL Edris(1), KYYRA Jorma(1)
(1)AALTO UNIVERSITY - FINLANDPresented by: ZEB Farrukh - Aalto University - FINLAND |
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| Presented by: ZEB Farrukh - Aalto University - FINLAND |
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| 0005-epe2025-full-16232433.pdf |
| Among different converter topologies, the active front-end (AFE) rectifier has been widely used in recent research for generating controlled output DC power. Simultaneously, model predictive control (MPC) has emerged as a prominent and actively researched topic, particularly for its applications in development of advanced control strategies. In this paper, a control method is presented that leverages the predictive capability of MPC to achieve the desired reference power through the DC power generated by the AFE rectifier. A new exponential function has been introduced in the proposed control method as a dynamic reference power for the MPC. This reference power can be updated according to the DC-link voltage requirements for an effective DC voltage regulation. Finally, the performance of the proposed control method is compared with the performance of the conventional PI-based control method and preceding MPC-based control techniques, to validate its superiority over the existing control methods. Implemented and verified in Matlab Simulink, this technique shows five-time faster recovery and zero steady state error. |
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| 025 - Multiple generator’s stator windings as voltage sources for a multilevel converter |
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TAYAR Tal(1), SHMILOVITZ Doron(1)
(1)TEL-AVIV UNIVERSITY - ISRAELPresented by: SHMILOVITZ Doron - Tel-Aviv University - ISRAEL |
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| Presented by: SHMILOVITZ Doron - Tel-Aviv University - ISRAEL |
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| 0025-epe2025-full-18224293.pdf |
It is proposed to use a generator’s stator windings
to create multiple, isolated voltage sources for multiple
multilevel converters (MC). Under this approach
the generator windings are viewed as transformer
windings, with multiple secondary windings.
Thus, we propose to redesign the stator windings
as multiple transformers hence turning a single 3-
phase output multiple 3-phase outputs. After
rectifying the outputs, they function as separate
isolated DC voltage sources, which are applied to
an MC’s input. Taking advantage of the readily
existing generator’s magnetics, no additional
magnetic components are required under the
proposed method. |
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| 174 - An AC fault ride-through control of modular multilevel converters for HVDC systems |
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OUOBA Sidlawendé(1), MOREL Florent(1)
(1)SUPERGRID INSTITUTE - FRANCEPresented by: OUOBA Sidlawendé - SuperGrid Institute - FRANCE |
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| Presented by: OUOBA Sidlawendé - SuperGrid Institute - FRANCE |
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| 0174-epe2025-full-08462475.pdf |
This paper proposes a modified threshold virtual impedance (MTVI) control to ensure an AC fault ride-through (FRT) for modular multilevel converters (MMCs). The proposal limits the AC current of the MMC by virtually increasing its output impedance. It prevents to trigger its protection systems when a fault occurs. Compared with conventional TVI control, the proposed method avoids not only MMC blocking but also increases its power quality by providing undistorted voltage and current waveforms in the case of asymmetrical faults. Simulations in MATLAB/Simulink are carried out to validate the effectiveness of the proposed MTVI control, which is compared with the conventional TVI
control. The results show the ability of the MTVI control to limit voltage and current perturbations in the MMC and to provide better voltage and current profiles compared to the classical TVI during unbalanced faults |
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| LS1b - Topic 1 - Electromobility (I) |
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Chair(s):
VAN MIERLO Joeri - Vrije Universiteit Brussel - BELGIUM
ROBOAM Xavier - LAPLACE Université de Toulouse - FRANCE |
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| 052 - Analysis of Energy Storage Solutions for Ship Maneuvering in Ports |
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LAFOZ Marcos(1), NAVARRO Gustavo(1), BLANCO Marcos(2), NÁJERA Jorge(2), RAUSELL Eduardo(1), MUNILLA Javier(1)
(1)CENTRO DE INV. ENERGETICAS, MEDIOAMBIENTALES Y TECNOLOGICAS - SPAIN
(2)CENTRO DE INV. ENERGETICAS, MEDIOAMBIENTALES Y TEC - SPAINPresented by: LAFOZ Marcos - CIEMAT - SPAIN |
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| Presented by: LAFOZ Marcos - CIEMAT - SPAIN |
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| 0052-epe2025-full-14152875.pdf |
| The recent regulation about pollution reduction in port areas promote the development of electric ships, at least to operate with no fuel during approaching and departing. The paper presents the analysis of different energy storage alternatives for the case of power supply of a ferry during the docking and undocking manoeuvres. Considering that the use of batteries does not fully comply with the maritime conditions, short-term energy storage technologies are studied as alternative, specifically flywheels and supercapacitors. After the analysis of these systems, based on models parametrized from prototypes characterized at the lab, neither of them is suitable for the case study. However, the use of a battery/SCs hybrid energy storage provides a techno-economic feasible solution, specially under the situation of dimensioning the complete system according to the consumption profile of the ferry. |
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| 131 - Impedance measurement methods for assessing the performance of Fuel Cells and Li batteries in on-board applications |
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MILLET Jules(1), DEPERNET Daniel(1), SARI Ali(2), GUSTIN Frédéric(1), HELBLING Hugo(2)
(1)FEMTO-ST - FRANCE
(2)LABORATOIRE AMPERE - CNRS - FRANCEPresented by: MILLET Jules - FEMTO-ST - FRANCE |
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| Presented by: MILLET Jules - FEMTO-ST - FRANCE |
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| 0131-epe2025-full-09400614.pdf |
| This study focuses on the characterization of fuel cells and batteries to assess their State of Health (SoH) using electrochemical impedance spectroscopy (EIS) in an on-board setting. The characterization methods include both active and passive EIS techniques, complemented by robust signal processing algorithms. Initial simulation results demonstrate the potential of impedance analysis for accurate SoH estimation. In addition, the implementation on a Texas Instruments board highlights the practical challenges associated with real-time programming, paving the way for future optimization and deployment in realworld applications. |
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| 140 - Analysis of Aged Power Modules considering the Loss Calculation of a Heavy-Duty Fuel Cell Truck |
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GÜRLEK Yavuz(1), HEIMLER Patrick(2), ABUOGO James(2), GESELL Sören(2), ACKERL Martin(1), DOLD Roland(1), BASLER Thomas(2)
(1)DAIMLER TRUCK AG - GERMANY
(2)TECHNISCHE UNIVERSITAT CHEMNITZ - GERMANYPresented by: ABUOGO James - TU Chemnitz - GERMANY |
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| Presented by: ABUOGO James - TU Chemnitz - GERMANY |
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| 0140-epe2025-full-14073146.pdf |
| The aging of power modules in Heavy-Duty Fuel Cell Trucks (HDFCT) is crucial because, as these modules age, their on-state resistance increases. This increase results mainly in higher switching and conduction losses in case of a Si IGBT, ultimately reducing the efficiency of the truck. This work presents the results of simulated switching and conduction losses based on a real mission profile using actual measured (aged) devices. These devices exhibit varying on-state resistances. |
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| LS1c - Topic 2 - Smart grids and renewable energy (I) |
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Chair(s):
DWORAKOWSKI Piotr - SuperGrid Institute - FRANCE
BENCHAIB Abdelkrim - SuperGrid Institute - FRANCE |
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| 146 - High-Power 4500 V 5000 A Press Pack IGBTs for HVDC Solid-State Circuit Breaker Application |
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SASMAL Koushik(1), SCHMIDT Josef(1), FELSL Hans-Peter(2), HENNIG Martin(2), DROLDNER Markus(1), DRILLING Christof(1), PRZYBILLA Jens(1)
(1)INFINEON TECHNOLOGIES BIPOLAR GMBH&CO.KG - GERMANY
(2)INFINEON TECHNOLOGIES GERMANY - GERMANYPresented by: SASMAL Koushik - Infineon Technologies Bipolar - GERMANY |
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| Presented by: SASMAL Koushik - Infineon Technologies Bipolar - GERMANY |
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| 0146-epe2025-full-14415093.pdf |
| Low Temperature Sintered Press-pack IGBTs (PPI) outperform modules, offering improved cooling efficiency, reliability, and significantly higher-current handling. A single 4500 V, 5000 A PPI is designed to withstand 20-30 kA DC system short-circuit currents for 150 ms, making PPI a robust and space-saving choice for solid-state DC breaker applications. |
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| 041 - New Multilevel Converter System for Electric Arc Furnace Power Supply |
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BASIC Duro(1), BAVIERE Cyrille(1), CLAVIER Philippe(1), GARMIER Pieee-Louis(1), LAPASSAT Nicolas(1), SIHLER Christof(1), TERRIEN Franck(1)
(1)GENERAL ELECTRIC POWER CONVERSION - FRANCEPresented by: BASIC Duro - GE Power Conversion - FRANCE |
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| Presented by: BASIC Duro - GE Power Conversion - FRANCE |
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| 0041-epe2025-full-15300967.pdf |
| Historically, utility requirements have been satisfied with the use of compensators (SVCs or STATCOMs) connected in parallel to electric arc furnaces (EAFs), to correct the power factor and reduce harmonics, flicker, and unbalance. To further increase power quality and furnace productivity, a series-connected converter system for EAFs has been developed. |
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| 322 - Containerized AC/DC Converter Station as a Building Block for Medium-Voltage DC Grids |
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BRÜCKNER Thomas(1), SHARAF ADDIN Ali(1), MARQUARDT Sven(1), CÖMERT Arif(1), ZIMMERT Florian(1)
(1)UNIVERSITAT DER BUNDESWEHR MUNCHEN - GERMANYPresented by: BRUECKNER Thomas - Universität der Bundeswehr - GERMANY |
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| Presented by: BRUECKNER Thomas - Universität der Bundeswehr - GERMANY |
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| 0322-epe2025-full-20113155.pdf |
| DC grids are one solution to help balance the growing energy demand with distributed renewable generation and storage systems. To simplify the setup of medium-voltage (MV) DC grids, a simple system architecture with few standardized core components is necessary. For the coupling of new MVDC grids to existing AC grids, this paper proposes a design for a modular multilevel converter (MMC) station that could be premanufactured in factory and easily shipped to any site as a building block with up to 40-MW power rating. To achieve the required level of integration and compactness, innovative approaches for component and system-level design need to go hand in hand, as will be illustrated in the paper. |
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| LS1d - Topic 7 - Active devices |
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Chair(s):
SIEMIENIEC Ralf - Infineon Technologies Austria - AUSTRIA
LUTZ Josef - TU Chemnitz - GERMANY |
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| 154 - 400 V SiC MOSFET empowering three-level topologies for highly efficient applications from motor-drives to AI |
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SIEMIENIEC Ralf(1), WATTENBERG Martin(1), KOCAAGA Ertugrul(1), JAGANNATH Sriram(1), KAHRIMANOVIC Elvir(1), BHANDARI Jyotshna(1), SHIM Heejae(1), PIGNATELLI Alberto(1)
(1)INFINEON TECHNOLOGIES AUSTRIA AG - AUSTRIAPresented by: SIEMIENIEC Ralf - Infineon Technologies Austria - AUSTRIA |
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| Presented by: SIEMIENIEC Ralf - Infineon Technologies Austria - AUSTRIA |
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| 0154-epe2025-full-15221194.pdf |
The introduction of 400 V SiC MOSFET technology bridges the voltage range gap between 200 V medium-voltage MOSFETs and 600 V super-junction MOSFETs. This technology is characterized by low switching losses and low on-state resistance, making it suitable for 2-level topologies in 120 VAC or 300 VDC systems or 3-level topologies with typical input voltages ranging from 180 VAC to 350 VAC or 400 VDC to 600 VDC.
The technology concept is presented, and its efficiency and power density gains are demonstrated through measurements on test boards representing a 3-level ANPC general purpose inverter and a 3-level FC PFC for highly-efficient power supplies. |
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| 323 - Investigation on the Short-Circuit Behavior of HV-SiC-MOSFETs in Quasi Series Connection |
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GESELE Felix(1), BÄUMLER Christian(2), BASLER Thomas(2), BRÜCKNER Thomas(1)
(1)UNIVERSITAT DER BUNDESWEHR MUNCHEN - GERMANY
(2)TECHNISCHE UNIVERSITAT CHEMNITZ - GERMANYPresented by: GESELE Felix - UniBw München - GERMANY |
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| Presented by: GESELE Felix - UniBw München - GERMANY |
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| 0323-epe2025-full-22071902.pdf |
| This paper investigates the short-circuit behavior of SiC MOSFETs in a quasi series connection, which can be found in several topologies with three or more switches in a commutation loop. In the event of a device failure, this could offer the opportunity to select a device which had seen less stress up to this point to turn off the short circuit, and thus improve the (general) failure handling. Besides a theoretical analysis, short-circuit tests for such configurations are carried out with state-of-the-art 3.3-kV SiC MOSFET half-bridge modules. The analysis focuses particularly on the voltage distribution between the switches, examining the influence of different physical setups and device parameters. |
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| 053 - Silicon IGBT modules with voltage slopes higher than SiC modules |
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ZOELS Thomas(1), MARI Jorge(1), CARASTRO Fabio(1)
(1)SEMIKRON DANFOSS - GERMANYPresented by: ZOELS Thomas - Semikron Danfoss - GERMANY |
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| Presented by: ZOELS Thomas - Semikron Danfoss - GERMANY |
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| 0053-epe2025-full-16312481.pdf |
| This paper presents the issue of generating excessive dV/dt in standard medium voltage IGBT modules with PiN freewheel diodes. Two different application scenarios are discussed where the issue arises. A proposed modified double pulse test allows to investigate the phenomenon under controlled laboratory conditions. Power modules from two different manufacturers were characterized and the test results are presented. Finally, a comparison with an intermediate voltage SiC module is shown and relevant EMI considerations conclude the paper. |
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| LS1e - Topic 8 - Magnetic Components – Inductors and Transformers (I) |
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VAN DEN BOSSCHE Alex - Ghent University - BELGIUM |
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| 056 - Design Optimization of Integrated CM/DM Inductors for Power Drive Input Filter |
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DRUMMOND Rodrigo(1), COUGO Bernardo(1), TRAN Duc-Hoan(1), ALMEIDA Gregory(1), SERPAUD Sébastien(1), DOS SANTOS Victor(2), M F MORAIS Lenin(3)
(1)IRT SAINT EXUPERY - FRANCE
(2)SAFRAN TECH - FRANCE
(3)FEDERAL UNIVERSITY OF MINAS GERAIS - BRAZILPresented by: DRUMMOND Rodrigo - IRT Saint Exupery - FRANCE |
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| Presented by: DRUMMOND Rodrigo - IRT Saint Exupery - FRANCE |
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| 0056-epe2025-full-15504131.pdf |
| More electric aircraft face many challenges regarding weight and losses of power quality and EMI filters. A solution to reduce weight and losses is integrating the Differential Mode (DM) and Common Mode (CM) inductances of filters in the same component. This integration can be accomplished by adding extra magnetic paths and windings to a CM choke to increase its leakage inductance further. This paper proposes a design optimization of an integrated CM/DM inductor for EMI input filters of Power Drive Systems used in more electric aircraft. The integrated solution is then compared to an optimized discrete solution, showing significant reductions in weight and losses. |
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| 170 - Current Transformer-Based Power Supply for Pulse Encoders on Motor Power Lines in Adjustable Speed Drive Systems |
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NAKAGAKI Takumi(1), YAMAGUCHI Masamichi(1), WATANABE Hiroki(1), NAKATA Yuki(1), ITOH Jun-Ichi(1), KIRIBUCHI Takeshi(2), MORIMOTO Shigeo(3)
(1)NAGAOKA UNIVERSITY OF TECHNOLOGY - JAPAN
(2)OMRON CORPORATION - JAPAN
(3)OSAKA METROPOLITAN UNIVERSITY - JAPANPresented by: NAKAGAKI Takumi - NAGAOKA UNIVERSITY - JAPAN |
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| Presented by: NAKAGAKI Takumi - NAGAOKA UNIVERSITY - JAPAN |
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| 0170-epe2025-full-02225185.pdf |
This paper proposes a novel power supply
system for an encoder in motor drive systems.
The proposed system eliminates the need for a
dedicated power supply cable for the encoder by
utilizing a current transformer connected to the
load motor. A design method for the current
transformer is presented, considering its
operation under non-linear loads and variable
frequencies. The design process is simplified by
modeling the diode rectifier as an equivalent
voltage source. The validity of the proposed
design is verified through experiments,
demonstrating that the output voltage closely
matches the design values. Additionally, a DCDC
converter is implemented at the output side of
the diode rectifier to stabilize the output voltage.
Experimental results confirm voltage
stabilization across the entire operating range on
the N-T map. |
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| 182 - Investigating the Impact of Alignment Angle Between Copper Turns and Magnetic Core on Magnetic Field Coupling in PCB Integrated Inductors |
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ALKURDI Mohamed(1), PETIT Mickael(2), BOUARROUDJ Mounira(1), MARTIN Christian(3)
(1)UNIVERSITE PARIS-SACLAY - FRANCE
(2)CONSERVATOIRE NATIONAL DES ARTS ET METIERS - FRANCE
(3)LABORATOIRE AMPERE - CNRS - FRANCEPresented by: ALKURDI Mohamed - CNRS/Paris-Saclay University - FRANCE |
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| Presented by: ALKURDI Mohamed - CNRS/Paris-Saclay University - FRANCE |
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| 0182-epe2025-full-16431767.pdf |
| This study investigates the influence of copper trace alignment relative to the magnetic core in PCB-embedded inductors, focusing on the effects of the alignment angle on perpendicular magnetic flux density that shall cause eddy currents in AC applications. Although aligning traces at right angles is common in traditional inductor winding, it may not be feasible for PCB designs due to manufacturing constraints. The study proposes an investigation of the angular-shift effects on magnetic flux while maintaining practical PCB manufacturability in potential applications like static power converters. By evaluating how the angular shift impacts magnetic flux behavior in copper traces, this research is part of a study that aims to address efficiency losses and heating caused by eddy currents. Through Finite Element Method (FEM) simulations using Ansys Maxwell software and experimental validation, the results demonstrate that smaller alignment angles, particularly at 0°, reduce perpendicular flux what shall mitigate eddy current formation in AC applications, improving inductor performance. |
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| DS1a - Topic 1: Electric Road Vehicles |
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ROBOAM Xavier - LAPLACE Université de Toulouse - FRANCE |
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| 138 - Development of Integrated Functions in GaN |
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MARCELINO Yovan Andyka(1), ESCOFFIER René(1), ALLARD Bruno(2)
(1)CEA - COMMISSARIAT A L'ENERGIE ATOMIQUE (GRENOBLE) - FRANCE
(2)INSA DE LYON - FRANCEPresented by: MARCELINO Yovan Andyka - CEA - FRANCE |
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| Presented by: MARCELINO Yovan Andyka - CEA - FRANCE |
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| 0138-epe2025-full-17311981.pdf |
| This paper takes advantages of Gallium Nitride (GaN) as an ideal material in the development of electronic devices for high power and frequency applications. The paper details the circuit design and implementation of logic and analogue gates using a GaN-on-SI, non isolated proprietary technology to create a gate driver circuit for driving and instrumenting wide-gap power transistors. |
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| 142 - Energetic properties of the fast charging and driving of an electric vehicle - A Ragone analysis |
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RUFER Alfred(1)
(1)ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE - SWITZERLAND |
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| 0142-epe2025-full-19075641.pdf |
| The energy efficiency of EV’s is analysed for the charging and for the driving process where real parameters of a product of the automotive industry are considered. The efficiency in the charging mode is analysed and represented in function of the charging time. The maximum charging power allowed by the manufacturer is defining the lowest efficiency. For the driving mode, the efficiency is estimated with the help of a special tool called “The Theory of Ragone plots”. The driving efficiency is calculated for the maximum possible propulsion power of the car and is represented in a dimensionless Ragone representation. The rated power of the car is represented in reference to the maximum possible power that can deliver the car battery. |
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| 180 - TRACKSIM: A Multi-Level Simulation Framework for Near-Life Battery Data Generation |
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WEINREICH Nicolai(1), SUI Xin(1), TEODORESCU Remus(1), LARSEN Kim(1)
(1)AALBORG UNIVERSITY - DENMARKPresented by: WEINREICH Nicolai - Aalborg University - DENMARK |
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| Presented by: WEINREICH Nicolai - Aalborg University - DENMARK |
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| 0180-epe2025-full-17103133.pdf |
| Data-driven methods in the battery intelligence field are highly dependent on data similar to the targeted application. This paper introduces the multi-level simulation framework TRACKSIM as a tool to generate realistic synthetic battery cell data for training data-driven models. A use-case for State-Of-Health (SOH) estimation is presented. |
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| 189 - Cost and Efficiency Optimization for a Reconfigurable E-Bike Battery System |
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ESTALLER Julian(1), GRUPP Wolfgang(1), SOROKINA Nina(1), WIEDENMANN Andreas(1), HÖGERL Tobias(1), BUBERGER Johannes(1), POHLMANN Sebastian(1), KUDER Manuel(1), WEYH Thomas(1)
(1)UNIVERSITAT DER BUNDESWEHR MUNCHEN - GERMANYPresented by: ESTALLER Julian - UniBw M - GERMANY |
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| Presented by: ESTALLER Julian - UniBw M - GERMANY |
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| 0189-epe2025-full-10595410.pdf |
| This study optimized and evaluated the module voltage level of an e-bike’s reconfigurable battery system for efficiency and costs against a conventional powertrain. For micromobility applications, findings indicate that with today’s semiconductor switches, these systems remain less competitive than a conventional, two-level inverter powertrain, with a 5% efficiency and 18% cost disadvantage. |
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| 212 - New design methodology for the calculation of the feed sections into which the acceleration track of a hyperloop vehicle is divided |
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NAVARRO Gustavo(1), BLANCO Marcos(1), NÁJERA Jorge(1), RAUSELL Eduardo(1), URDA Valentín(1), LAFOZ Marcos(1)
(1)CENTRO DE INV. ENERGETICAS, MEDIOAMBIENTALES Y TEC - SPAIN |
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| 0212-epe2025-full-22075426.pdf |
| This paper presents the design methodology used to optimize the number of sections into which the acceleration track of a Hyperloop-type vehicle is divided. In these types of vehicles, a pre-acceleration system is necessary to reach a speed close to cruising speed before the main propulsion system can operate. For this purpose, a switched reluctance linear motor (LSRM), divided into what are called unitary machines (UMs) connected in series, is proposed along with a converter to control thrust force generated by the motor. The methodology is applied to a specific case (mission) where a mass of 250 kg needs to be accelerated over a distance of 60 m to reach a speed of 120 km/h. As a result of the proposed methodology, the number of sections into which the linear motor is divided, the number of UMs per section, and the optimal turn-on and turn-off angles of the LSRM phases are determined to achieve the target force profile |
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| 245 - Comparative Evaluation of Two-Level Inverters and a Disruptive Multi-Level Solution: Impact of Switch Technology |
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JARDOT Rémi(1), LAHLOU Anas(2), KREBS Guillaume(1), ROY Francis(3), MARCHAND Claude(1)
(1)GEEPS - FRANCE
(2)SAFT - FRANCE
(3)STELLANTIS - FRANCE |
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| 0245-epe2025-full-12302798.pdf |
| This study investigates the performance of electric vehicle drivetrains using various modeling techniques. A comprehensive approach combining Matlab Simulink and finite element analysis assesses electrical and mechanical outputs, efficiency, and losses in different components. The findings aim to compare drivetrain architectures (CHB like and SiC three-phase inverter architectures) and identify opportunities for performance optimization. |
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| 253 - Control of Battery-Integrated MMCs with NLM using Distributed Control Architecture |
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BALACHANDRAN Arvind(1), JONSSON Tomas(1), ERIKSSON Lars(1)
(1)LINKOPING UNIVERSITY - SWEDENPresented by: BALACHANDRAN Arvind - Linköping University - SWEDEN |
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| Presented by: BALACHANDRAN Arvind - Linköping University - SWEDEN |
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| 0253-epe2025-full-19075170.pdf |
| Battery-integrated modular multilevel converters (BI-MMCs) have several series-connected submodules, each with a small battery module. This design has high cell-level control, potentially improving efficiency and battery lifespan compared to traditional EV battery inverter systems. A distributed control architecture is preferred for BI-MMCs with a large number of submodules, and in such control architectures, the communication network limits the sample rate of the reference signal. For variable speed drives, where the fundamental frequency can be up to a few kHz, the reference sampling frequency can adversely affect the submodule battery current quality and accuracy. The concept of reconstructing the reference signal at a higher sampling frequency than the communication link's update rate for BI-MMCs using nearest level modulation is introduced and validated through simulations and experimental results. |
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| 312 - A Feedback-Enhanced Approach to Modeling Semiconductor Ageing in Electric Vehicle Inverters |
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RODE Sebastian(1), LIANG Hulin(2), BERNET Steffen(1)
(1)TECHNISCHE UNIVERSITAT DRESDEN - GERMANY
(2)TECHNICAL UNIVERSITY OF BERLIN - GERMANYPresented by: RODE Sebastian - TU Dresden, Power Electronics - GERMANY |
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| Presented by: RODE Sebastian - TU Dresden, Power Electronics - GERMANY |
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| 0312-epe2025-full-22080268.pdf |
With the increasing adoption of electric vehicles as a sustainable solution to curb greenhouse gas emissions, the reliability and lifetime calculation of power electronic converters, particularly semiconductor components, in traction inverters, become paramount.
Utilizing a mission profile based on the worldwide harmonized light-duty test cycle, this paper introduces an advanced approach to calculate semiconductor lifetime of an EV traction inverter.
Employing a functional model to calculate power losses and device temperatures. An ageing model, incorporating power cycling capability data in a LESIT model, determines consumed lifetime. The feedback loop integrates the consumed lifetime into the functional model, degrading thermal properties in proportion allowing the changing system characteristics to be taken into account during calculation. This positive feedback loop accelerates ageing, highlighting the significant influence on the lifetime assessment compared to conventional implementations. |
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| 335 - Power Hardware and Driver-in-the-Loop for Battery Testing applied to Electrified Vehicles |
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TOURNEZ Florian(1), LHOMME Walter(1), BOUSCAYROL Alain(2), GERMAN Ronan(1), LEMAIRE-SEMAIL Betty(3), LIEVRE Aurélien(4), LIEVRE Aurélien(4), SANCHEZ-TORRES Mariam(4), SANCHEZ-TORRES Mariam(4)
(1)UNIV. LILLE, ARTS ET METIERS, CENTRALE LILLE, JUNIA, ULR 2697-L2EP - FRANCE
(2)UNIVERSITE LILLE 1 - L2EP - FRANCE
(3)L2EP - UNIV. LILLE - FRANCE
(4)VALEO EQUIPEMENTS ELECTRIQUES MOTEUR - FRANCE |
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| 0335-epe2025-full-10175666.pdf |
| This paper presents a unified approach to include a driver and a power subsystem in a testing simulation loop. The aim is to create a kind of lab- based vehicle offering an alternative to the Vehicle-in-the-Loop (ViL) approach or vehicle prototype for battery testing. This lab-based vehicle is built around experimental test benches and a driving simulator to reproduce a vehicle in laboratory. A unified approach is used to easily identify inputs and outputs between the model vehicle and the emulation interfaces. The unified approach is based on the Energetic Macroscopic Representation (EMR) formalism. A Power Hardware-in-the-Loop (P-HiL) simulation is introduced for battery testing. Furthermore, standalone battery testing is extended to include a Driver in the Loop (DiL). A case study based on a retrofitted Plug-in Hybrid Electric Vehicle (P-HEV) is presented with experimental results. |
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| DS1b - Topic 1: Electric Aircraft, Aerospace and Drones |
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Chair(s):
ROBOAM Xavier - LAPLACE Université de Toulouse - FRANCE |
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| 123 - Transition Control from Dual to Single Motor to Prevent Speed Reduction during an Open-Circuit Fault in a DC Power System |
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OBITSU Ayumi(1), KONDO Keiichiro(1), YOSHIMOTO Kantaro(2), YAZAKI Satoshi(3), KANMOTO Osamu(3), SUGAWARA Hirotaka(3), SHIMOTSU Takuya(3)
(1)WASEDA UNIVERSITY - JAPAN
(2)TOKYO DENKI UNIVERSITY - JAPAN
(3)IHI - JAPAN |
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| 0123-epe2025-full-07581320.pdf |
| This study examined a tandem motor system for more electric aircraft (MEA). A method was proposed that, during a single motor’s power loss, continuously outputs the necessary torque to maintain speed and suppress speed reduction compared with standard controls, achieved by directly modulating torque command distribution based on overmodulation detection. |
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| 136 - Analysis, Modulation and Control of a Ground Power Unit for Aircraft Applications |
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DUAN Beichen(1), RIVERA Marco(1), WHEELER Patrick(1), MUNOZ Javier(2)
(1)UNIVERSITY OF NOTTINGHAM - UNITED KINGDOM
(2)CHILE - CHILE |
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| 0136-epe2025-full-12273889.pdf |
| This paper presents a PLECS-based simulation of innovative AC-AC converter configurations tailored for Ground Power Units (GPUs), addressing the critical demand for airport electrification, a cornerstone of sustainable aviation and ground operations. The proposed design incorporates a Current-Synthesized Power Factor Correction (CSPFC) rectifier, operating with a suitable harmonic injection technique, and proper modulation strategies. Simulation results demonstrate the system’s effectiveness in mitigating issues such as harmonic distortion, voltage ripple, and other operational challenges, underscoring its potential to enhance performance and sustainability in GPU applications. |
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| 222 - Comprehensive Analysis of High Bandwidth Converters Based on SiC Technology for Automotive and Aircraft Applications |
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DA COSTA Israel(1), COGO Bernardo(1), MORAIS Lenin(2)
(1)IRT SAINT EXUPERY - FRANCE
(2)FEDERAL UNIVERSITY OF MINAS GERAIS - BRAZILPresented by: DIVAN Israel - IRT Saint Exupery - FRANCE |
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| Presented by: DIVAN Israel - IRT Saint Exupery - FRANCE |
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| 0222-epe2025-full-14380065.pdf |
This paper explores the influence of semiconductor
technology on the bandwidth of power converters,
with a particular focus on the loss mechanisms of
Silicon Carbide (SiC) MOSFETs and the non-idealities of
switching cells. A model for the harmonic content as a
function of switching frequency to evaluate the potential
bandwidth limits based on the total harmonic distortion
(THD) of the output current is introduced. Given that the
relationship between bandwidth and switching frequency
is directly proportional to the THD limit of the output
current, it becomes crucial to investigate the temperature
limitations and loss mechanisms of the components used
within the switching cell to ensure a viable converter. Both
simulation and experimental results are employed to verify
the accuracy of loss models and evaluate the relationship
between THD and switching frequency, considering ripple
current, the effect of output inductance parasitic capacitance,
the saturation of the magnetic core, as well as the
impact of dead time. |
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| DS1c - Topic 1: Electric Ships |
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Chair(s):
ROBOAM Xavier - LAPLACE Université de Toulouse - FRANCE |
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| 232 - Battery Swapping implementation on electric sea taxes; the case of Ionian islands |
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KOTARELA Faidra(1), KYRITSIS Anastasios(2), RIGOGIANNIS Nick(1), PAPANIKOLAOU Nick(1)
(1)DEMOCRITUS UNIVERSITY OF THRACE - GREECE
(2)IONIAN UNIVERSITY - GREECEPresented by: PAPANIKOLAOU Nick - DUTH - GREECE |
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| Presented by: PAPANIKOLAOU Nick - DUTH - GREECE |
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| 0232-epe2025-full-16282022.pdf |
| Waterborne transportation significantly impacts the environment, contributing to climate change. In light of the global shift towards electrification, the need for a transition of the maritime transport into a more sustainable paradigm becomes imperative. This study investigates the feasibility of implementing the battery swapping concept for small vessels operating short daily routes in the Ionian Islands, as an alternative to conventional battery charging. A comprehensive case study is presented, examining the proposed system from both techno-economic and environmental perspectives, through Life Cycle Cost and Life Cycle Assessment analyses. The findings highlight the sustainability benefits of the battery swapping concept, including reduced greenhouse gas emissions, along with valuable insights for advancing green maritime transport technologies. |
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| DS1d - Topic 1: Electric Off-Road and Non-Conventional Vehicles |
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Chair(s):
ROBOAM Xavier - LAPLACE Université de Toulouse - FRANCE |
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| 047 - Fuel Cell Design Considerations and Component Optimisation for Isolated Electric Energy Systems with Periodic Load Patterns |
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HOFF Bjarte(1)
(1)UIT THE ARCTIC UNIVERSITY OF NORWAY - NORWAYPresented by: HOFF Bjarte - UiT Narvik - NORWAY |
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| Presented by: HOFF Bjarte - UiT Narvik - NORWAY |
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| 0047-epe2025-full-10211659.pdf |
| This paper presents design considerations for hydrogen-based fuel cell distributed generation units for electricity production in isolated energy systems and vehicles with periodic load pattern, replacing fossil fuel engines. Transient loads, inrush currents, fault currents that may occur in the power system is described. An optimization algorithm is used to find optimal component selection based on the load profile and cost parameters. |
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| DS1e - Topic 1: Power-Electronic Devices and Integration for Electromobility |
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Chair(s):
ROBOAM Xavier - LAPLACE Université de Toulouse - FRANCE |
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| 156 - Modeling of the steady-state ac current fluctuation in two-stage electric car fast chargers based on solid-state transformers |
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ELIZONDO-MARTINEZ David(1), BARRIOS Ernesto Luis(1), SANCHIS Pablo(1)
(1)PUBLIC UNIVERSITY OF NAVARRE - SPAINPresented by: ELIZONDO-MARTINEZ David - Public University of Navarre - SPAIN |
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| Presented by: ELIZONDO-MARTINEZ David - Public University of Navarre - SPAIN |
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| 0156-epe2025-full-15594995.pdf |
| Two-stage conversion structures are increasingly attracting attention, particularly for electric vehicles fast charging, and those based on a solid-state transformer (SST) and with a postregulator stand out. As a consequence of this postregulator, there is a steady-state fluctuation in the ac current of the SST, which turns into a greater rms current value that can impact on the converter performance. Hence, an analytical formula of this fluctuation should be considered during the design process. This work proposes a model for two different conversion structures (two-level and three-level), which is validated through simulations. The design process can be benefited from implementing the presented model, as it shows the interactions between the two power conversion stages and allows accomplishing a limited current fluctuation in the SST while avoiding more expensive and bulkier dc-link capacitors than necessary. |
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| DS1f - Topic 2: Smart Grids, DC Networks and Components, Hybrid AC/DC Networks |
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Chair(s):
DWORAKOWSKI Piotr - SuperGrid Institute - FRANCE |
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| 077 - SiC Solid-state Power Contactors SSPC`s in comparison to E-Fuses and Solid-state Circuit breakers |
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HOHMANN Maik(1)
(1)TEMES ENGINEERING GMBH - GERMANY |
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| 0077-epe2025-full-20130690.pdf |
| In this work, the novel approach of a DC protection system based on an all-solid-state semiconductor PCB solution was presented. The switching element, called the "solid-state power contactor - SSPC", is implemented as a circuit board. Modern system integration technologies are used here. The focus is on circuit board technologies that distribute the power losses of the semiconductors in a targeted manner on the circuit board and can very quickly reduce high temperature gradients in the semiconductors in critical operating conditions. There are fundamental differences between the three systems E-Fuse, SSCB and SSPC, depending on their intended use. This is why E-Fuse is primarily considered a fuse replacement system, SSCB as an on/off switching device and the SSPC presented here as a protective device for functional safety must enable "safe disconnection and switching". In addition, the naming E-Fuse, SSCB or SSPC are not absolute. |
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| 093 - Handling Ground Faults in Meshed MVDC Grids by Fast Redistribution of Power Flow |
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NGUYEN Tuan Minh(1), MARQUÉS-LOPEZ José-Luis(1), HILLERMEIER Claus(1)
(1)UNIVERSITAT DER BUNDESWEHR MUNCHEN - GERMANYPresented by: NGUYEN Tuan Minh - Univ. der Bundeswehr München - GERMANY |
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| Presented by: NGUYEN Tuan Minh - Univ. der Bundeswehr München - GERMANY |
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| 0093-epe2025-full-12093407.pdf |
| In case of ground faults, the power flows within multiterminal DC grids must be redistributed to drive the current in faulty lines to zero. This paper completes a previously presented method for generating such transitions by a central component, a new feedback control to correct undesirable deviations from the desired behavior. |
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| 120 - A Multi-Agent Reinforcement Learning-based Secondary Control for Voltage Restoration and Current Sharing in DC Microgrids |
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SHAHNOOSHI Shima(1), EBRAHIMI Javad(1), BAKHSHAI Alireza(1)
(1)QUEEN'S UNIVERSITY - CANADA |
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| 0120-epe2025-full-21092039.pdf |
| Microgrids are designed for sustainable energy generation and the efficient use of Distributed Generators (DGs). DC microgrids face challenges such as current sharing and voltage restoration, commonly addressed using droop control. Despite its simplicity, droop control can lead to voltage deviations and inefficient current sharing. This paper develops a Multi-Agent Reinforcement Learning (MARL) based secondary control method using Deep Q-Networks (DQN) to improve voltage restoration and current sharing in DC microgrids. The proposed method leverages centralized training to utilize comprehensive environmental information, integrating both the voltage restoration and current sharing objectives into each agent's local reward function. Simulation results demonstrate the effectiveness of the MARL approach in addressing the limitations of droop control, ensuring stable current flow and enhancing overall system performance. |
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| 152 - Protection design for pole-to-pole faults in DC networks |
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WITT Fabian Benedikt(1), HOFFMANN Melanie(1), KURRAT Michael(1)
(1)TECHNISCHE UNIVERSITAT BRAUNSCHWEIG - GERMANYPresented by: WITT Fabian - elenia - TU Braunschweig - GERMANY |
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| Presented by: WITT Fabian - elenia - TU Braunschweig - GERMANY |
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| 0152-epe2025-full-17362950.pdf |
| Fault protection is one of the primary challenges impeding the widespread adoption of DC and hybrid AC/DC grids. A structured planning process for protection systems is necessary with regard to standardization. In this paper, a novel three-step protection system design process is proposed building upon the CENELEC (CLC/TS 50654-1) approach. The proposed planning process is separated into concept, system and component level. On concept level, the operational modes “continued operation”, “temporary stop” and “permanent stop” according to CENELEC are used to define desired system behaviour in the event of a fault. On system level, protective action sequences are defined to realize the system behaviour defined on concept level. Finally on component level, protective devices are dimensioned and tripping thresholds are determined. |
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| 167 - Enhanced Current-Limiting Strategy of Grid-Forming Converter Considering Grid-forming Capability |
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MAENG Junyeol(1), CUI Shenghui(1)
(1)SEOUL NATIONAL UNIVERSITY - KOREA (REPUBLIC OF)Presented by: MAENG Junyeol - SNU - KOREA (REPUBLIC OF) |
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| Presented by: MAENG Junyeol - SNU - KOREA (REPUBLIC OF) |
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| 0167-epe2025-full-07572495.pdf |
| Recently, Grid-forming (GFM) converters have gained significant attention for their ability to enhance power system stability during disturbances. However, conventional current-limiting strategies lack sufficient consideration for preserving GFM capability under current-limited conditions. To address this issue, this paper proposes a novel current-limiting strategy that simultaneously ensures accurate current limitation and preserves GFM capability. The proposed method minimizes deviations in the converter terminal voltage by incorporating a PCC voltage-based current-limiting condition in real time. This approach allows the GFM converter to preserve its natural response-driven GFM capability to the greatest extent possible within a given current limit. Experimental results validate the superior performance of the proposed method compared to existing methods. |
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| 188 - An overview of grid code possible requirements for an interoperability MVAC/MVDC systems – Focus on fault detection for a future PV power plant |
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LIM Nicolas(1), NGUYEN Van-Sang(1), BACHA Seddik(2), TRAN Quoc Tuan(1)
(1)CEA-INES - FRANCE
(2)G2ELAB CNRS/G-INP/UGA - FRANCEPresented by: LIM Nicolas - CEA-INES - FRANCE |
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| Presented by: LIM Nicolas - CEA-INES - FRANCE |
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| 0188-epe2025-full-18020107.pdf |
| An AC/DC interoperability is expected to be part of the future grid but is not currently developed at medium voltage level. Standardization efforts are necessary to develop medium voltage DC (MVDC) systems. This article discusses the existing grid code for medium voltage (MV) applications, providing an overview of the existing requirements and the future requirements expected for the development of MVDC applications. Behaviour of a hybrid AC/DC system during fault situations through PLECS based simulation has been provided. |
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| 194 - Comprehensive model of a synchronous generator for single-node studies |
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BAUTISTA Guillermo(1), GARCÍA Miguel(1), MARCOS Javier(1), DE LA PARRA Íñigo(1), MARROYO Luis(1)
(1)PUBLIC UNIVERSITY OF NAVARRE - SPAINPresented by: BAUTISTA Guillermo - UPNA - SPAIN |
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| Presented by: BAUTISTA Guillermo - UPNA - SPAIN |
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| 0194-epe2025-full-10325571.pdf |
As power electronics increasingly replace
Synchronous Generators (SGs), the focus on system frequency
stability has grown. To study frequency dynamics
during disturbances, time-domain models, such as the
simple single-node model, are used. The commonly used
single-node models lack sufficient representation of electric
power dynamics, simplifying converter-interfaced generation
(CIG) behavior as reduced system inertia. However,
control strategies, such as Power System Stabilizers
(PSS) on SGs or Power Oscillation Dampers (POD) on
CIG, can modify the system-wide frequency response.
This paper presents a comprehensive state-space model
of a SG for single-node studies, offering flexibility to
analyze electrical interactions involving the Automatic
Voltage Regulator (AVR) and PSS, while facilitating the
inclusion of power electronics. Additionally, the model
provides a mathematical framework for understanding the
relationships between system parameters through statespace
representation and could be used to explore other
critical interactions. |
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| 240 - Modular Clamping Circuit for High Speed Solid State Circuit Breakers |
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KAPAUN Florian(1), DAHMEN Christopher(1), STEINER Gerhard(1), WITTI Michael(1)
(1)AIRBUS DEFENCE & SPACE GMBH - GERMANY |
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| 0240-epe2025-full-10431526.pdf |
The aviation industry is on the cusp of a revolutionary transformation with the advent of zero-emission aircraft. These innovative aircraft, powered by cutting-edge technologies such as electric propulsion and hydrogen fuel cells, promise to significantly reduce the environmental impact of air travel. As global awareness of climate change and sustainability grows, the development and adoption of zero-emission aircraft are becoming increasingly vital. However, the integration of these advanced technologies necessitates robust electrical network protection to ensure safety and reliability. This leads to the need for advanced protection circuits, such as Solid-State Circuit Breakers (SSCBs) and clamping circuits, which are essential for managing the complexities of modern electrical systems. This paper focuses on an advanced clamping circuit that enables efficient voltage clamping for high-speed SSCBs. The method effectively clamps overvoltage in failure cases, realizing almost no voltage overshoot and a minimum time to clear the fault current. Due to its complete analog nature it is very suitable for safety critical applications where active digital control circuits have to be avoided. The proposed method is very efficient, ensuring the stability and safety of electrical networks in
zeroemission aircraft. |
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| 241 - Ultra-Fast Bidirectional SiC Solid-State Circuit Breaker for 800V / 400A Aircraft Applications |
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DAHMEN Christopher(1), KAPAUN Florian(1), STEINER Gerhard(1), RAUH Hubert(2), BAYER Florian(2)
(1)AIRBUS DEFENCE & SPACE GMBH - GERMANY
(2)FRAUNHOFER INSTITUTE FOR INTEGRATED SYSTEMS AND DEVICE TECHNOLOGY IISB - GERMANY |
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| 0241-epe2025-full-15422783.pdf |
| The shift toward electric propulsion in aircraft brings unique challenges to power distribution and protection systems, requiring the advancement of technologies like solid-state circuit breakers (SSCBs). This paper explores the pivotal role of SSCBs in electric aircraft, highlighting their potential to improve safety, reliability, and efficiency in 800V high-power environments. However, their integration in aviation also presents challenges, such as ultra-fast fault isolation within complex electrical architectures, efficient thermal management, enhanced reliability and safety, and the demand for lightweight, compact designs. This paper addresses these challenges by analyzing current technological limitations, exploring potential solutions, and presenting experimental results from a bidirectional silicon carbide (SiC) SSCB that successfully detects a 1kA fault current with a response time of less than 1µs. The results emphasize the need for continued innovation in SSCB technology to meet the stringent demands of next-generation electric aircraft. |
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| 268 - Three port converter control with automatic mode transition for interconnected and standalone DC microgrids |
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VASDARIS Athanasios(1), SALAGIANNIS Georgios(1), TATAKIS Emmanuel(1)
(1)UNIVERSITY OF PATRAS - GREECEPresented by: TATAKIS Emmanuel - University of Patras - GREECE |
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| Presented by: TATAKIS Emmanuel - University of Patras - GREECE |
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| 0268-epe2025-full-16444529.pdf |
| Various Three-Port Converters (TPCs) are proposed in literature, usually operated in standalone networks without their control clearly discussed. In this paper, a new control scheme, offering smooth and automatic mode transitions in standalone and interconnected DC Microgrids operation, is presented. The control is applied in a TPC that consists of a boost and a bidirectional buck-boost converter, integrating a PV string and a battery with the DC Microgrid. In contrast to other proposed control systems, the one suggested here guarantees the required function of maximum power point tracking and output regulation in all corresponding modes. The proper operation of the system is evaluated through simulation studies. |
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| 273 - Enhancing Optimal Power Flow Feasibility: A Novel Comparative Study of Approximation Techniques |
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ALIBHAI Sarah(1), CIOBANU Maxim(1), WIEJAK Wiktor(2), PETERS David(1), FATHI HAFSHEJANI Sajad(1), GAUR Daya(1), BENKOCZI Robert(1)
(1)UNIVERSITY OF LETHBRIDGE - CANADA
(2)UNIVERSITY OF EXETER - UNITED KINGDOMPresented by: ALIBHAI Sarah - University of Lethbridge - CANADA |
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| Presented by: ALIBHAI Sarah - University of Lethbridge - CANADA |
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| 0273-epe2025-full-23285918.pdf |
| This experimental study investigates three approximation methods (quadratic, linear, and logarithmic) of the Optimal Power Flow problem (OPF) in comparison to traditional DC-OPF approximations using benchmark cases from the MATPOWER library. The quality and efficiency of each method is assessed using novel error metrics in respect to the AC-OPF baseline, with a focus on phase angle, voltage magnitude and generation costs. Results demonstrate promise in outperforming DC-OPF while maintaining computational efficiency, especially in the case of the quadratic approximation. Findings indicate an attainable balance between accuracy and complexity and contribute to power system modeling with implications for real-time power system management and the integration of sustainable energy. |
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| 316 - Development of an Integrated Transmission-Distribution Simulation Model for Coordinated TSO-DSO Interface Management |
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BOUHADDA Mohamed Nadir(1), BELHAOUANE Mohamed Moez(1), DAVIGNY Arnaud(1), QASIMI Abdelhadi(2), BARBESANT Vincent(3), HAYE Sebastien(2), ROBYNS Benoit(1)
(1)L2EP JUNIA - FRANCE
(2)GEREDIS DEUX-SEVRES - FRANCE
(3)RESEAU DE TRANSPORT D’ELECTRICITE (RTE) - FRANCEPresented by: BELHAOUANE Mohamed Moez - JUNIA - L2EP - FRANCE |
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| Presented by: BELHAOUANE Mohamed Moez - JUNIA - L2EP - FRANCE |
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| 0316-epe2025-full-09260767.pdf |
| This paper presents a comprehensive methodology for integrated TSO/DSO modeling, aimed at enhancing coordinated management of transmission and distribution networks. The proposed approach allows to perform a unified numerical load-flow model that effectively integrates both transmission and distribution electrical systems, accounting for technical constraints of each grid operator. The validation of the detailed joint TSO/DSO model is carried out using real-world scenarios provided by grid operators, ensuring its practical applicability. |
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| 317 - Distribution Network Reconfiguration Including OLTC Limits and Variable Shunt Reactors |
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GRAINE Aghyles(1), GAUBERT Jean-Paul(1), LARRAILLET Didier(2)
(1)UNIVERSITY OF POITIERS - FRANCE
(2)SRD - FRANCEPresented by: GRAINE Aghyles - Univ. Poitiers - FRANCE |
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| Presented by: GRAINE Aghyles - Univ. Poitiers - FRANCE |
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| 0317-epe2025-full-11045435.pdf |
Networks often suffer from overvoltage
problems. The On-Load Tap Changers (OLTCs) may not
always be able to regulate the voltage. Distribution net-
work reconfiguration and variable shunt reactors can help
mitigate these issues. In this paper, OLTCs are modeled
and incorporated into the optimization. The results show
an improvement in the accuracy. |
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| DS1g - Topic 2: Renewable and New Energy Sources |
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Chair(s):
DWORAKOWSKI Piotr - SuperGrid Institute - FRANCE |
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| 328 - Integration of Small Hydropower Plants Integration to Microgrids: Overview, Control and Modelling Challenges |
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BERAL Gérard(1), EL MOUBAREK BOUZID Allal(1), TSAFACK Pierre(2), TSUANYO David(3), ESTIBALS Bruno(1), ALONSO Corinne(1)
(1)LABORATOIRE D'ANALYSE ET D'ARCHITECTURE DES SYSTEMES DU CNRS - FRANCE
(2)FACULTY OF ENGINEERING AND TECHNOLOGY, UNIVERSITY OF BUEA, BUEA, CAMEROON - CAMEROON
(3)NATIONAL CENTER FOR DEVELOPMENT OF TECHNOLOGIES-MINISTRY OF SCIENTIFIC RESEARCH - CAMEROONPresented by: ESTIBALS Bruno - LAAS-CNRS - FRANCE |
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| Presented by: ESTIBALS Bruno - LAAS-CNRS - FRANCE |
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| 0328-epe2025-full-18483990.pdf |
Hydroelectric power is a dispatchable energy source and plays a crucial role in maintaining stability
in islanded microgrids through grid-forming control. This paper presents a comprehensive overview of the modeling and control strategies for small hydropower plants (SHPs), their integration into microgrids, and their interactions with other distributed energy resources (DERs), such as solar power. The study focuses on examining key challenges related to stability, modeling, and control of SHPs to promote hybrid power integration within a microgrid. To address these challenges, recommendations for improving the performance of microgrid-based small hydropower plants are proposed, including advanced control techniques and the implementation of Hardware-in-the-Loop
(HIL) simulations to enhance the accuracy of modeling, testing, and validation. |
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| 291 - Energy-Based Model Representation for Design and Optimization of Piezoelectric Energy Harvesting Systems |
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TORRES GUZMAN Diana Angelica(1), LEMAIRE-SEMAIL Betty(1)
(1)L2EP - UNIV. LILLE - FRANCEPresented by: TORRES GUZMAN Diana Angelica - Dr. Angélica Torres Guzman - FRANCE |
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| Presented by: TORRES GUZMAN Diana Angelica - Dr. Angélica Torres Guzman - FRANCE |
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| 0291-epe2025-full-18403578.pdf |
| This paper presents a modular and adaptive modelling and simulation tool for piezoelectric energy harvesting (PEH) systems, applicable to portable micro-systems, such as wearable devices, sensors, or bio-medical devices. The main distinguishing feature of this tool is that it is designed to optimize the design phase and the energy management strategies, thanks to a systemic approach. By employing Energetic Macroscopic Representation (EMR) and inversion-based control, the tool facilitates flexible analysis across varying levels of detail. Using this tool, a validated model is constructed, enabling the testing of power converter strategies that connect piezoelectric elements to loads, as well as the evaluation of two energy harvesting strategies for imposed displacement systems. This work demonstrates the potential of advanced modelling techniques to enhance the design and implementation of piezoelectric energy recovery systems. |
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| DS1h - Topic 2: Power Electronics and Devices for Grid Applications |
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Chair(s):
DWORAKOWSKI Piotr - SuperGrid Institute - FRANCE |
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| 250 - A Current Source Buck – Boost Inverter for Active and Reactive Power Injection to the Low Voltage Grid |
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TSOUNIS Christoforos(1), TATAKIS Emmanuel(1), VOVOS Panagis(1)
(1)UNIVERSITY OF PATRAS - GREECEPresented by: TATAKIS Emmanuel - University of Patras - GREECE |
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| Presented by: TATAKIS Emmanuel - University of Patras - GREECE |
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| 0250-epe2025-full-16512880.pdf |
| With the ever-rising dependence and demand for Renewable Energy Sources, the development of reliable power converters that correspond to the modern-day grid requirements has become more necessary now than ever. In this paper a Bidirectional Buck-Boost inverter acting as a current source is proposed. This is realized by designing a Buck-Boost converter to operate only in the DCM mode, followed by an unfolding inverter to connect to the low voltage network. This arrangement offers complete freedom of choice both for the output current amplitude as well as its phase relative to the grid voltage. So, it is possible to precisely select the output power factor and inject both active and reactive power into the low voltage grid, by designing judiciously the converter control unit. Simulation and experimental results are used to validate the converters’ design and operation. |
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| DS1j - Topic 2: Green Hydrogen and “X”: Electrolyzers and Plants |
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Chair(s):
DWORAKOWSKI Piotr - SuperGrid Institute - FRANCE |
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| 078 - Impact of Operating Load Limits on the Control Strategy and Performance of Alkaline Electrolyzer Arrays in Renewable Energy Systems |
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WANG Xiongzheng(1), MENG Xin(1), NIE Gongzhe(1), YANG Haoran(1)
(1)SICHUAN UNIVERSITY - CHINA |
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| 0078-epe2025-full-10073297.pdf |
| This study examines the impact of varying operating load limits on control strategies and performance of alkaline electrolyzer arrays in renewable energy-based hydrogen production. Lower load limits improve hydrogen production by 10.63%, especially during low wind availability, but cause slight imbalances in load distribution. |
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| DS1k - Topic 7: Active Devices and Components |
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Chair(s):
LUTZ Josef - TU Chemnitz - GERMANY |
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| 258 - Measurement Techniques of Threshold Voltage Shift and Recovery in GaN e-HEMTs |
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ETOZ Burhan(1), DEB Arkadeep(1), ORTIZ-GONZALEZ Jose(1), ALATISE Layi(1)
(1)UNIVERSITY OF WARWICK - UNITED KINGDOM |
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| 0258-epe2025-full-11312728.pdf |
| This paper presents two different techniques of threshold voltage shift (?VTH) and recovery characterisation in GaN e-HEMTs. The first technique applies a stressing gate voltage (VGS) of defined magnitude and duration and then measures a ?VTH at different time intervals by shorting the gate-to-drain terminals of the e-HEMT while passing a sensing current trough the drain-source. In the second technique, after the VGS stress, a sensing current through the 3rd quadrant of the GaN e-HEMT is used to measure the 3rd quadrant voltage as an indicator of ?VTH. Both measurements show the same trends. With positive VGS stress, ?VTH is positive (due to electron capture at the p-GaN/AlGaN interface) and then becomes negative over time due to faster electron release than hole release. The magnitude of the initial positive ?VTH is proportional to the VGS stress while the recovery rate is inversely proportional of VGS stress. |
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| 259 - Modelling of SiC and GaN Transistors Based on Pulsed S-Parameter Measurements |
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HERGT Martin(1), HAMMER Bernhard(2), SACK Martin(3), MAYER Lukas W.(4), NIELEBOCK Sebastian(1), HILLER Marc(3)
(1)SIEMENS AG - GERMANY
(2)ABB AG - GERMANY
(3)KARLSRUHE INSTITUTE OF TECHNOLOGY (KIT) - GERMANY
(4)SIEMENS AG - AUSTRIAPresented by: HERGT Martin - Siemens AG - GERMANY |
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| Presented by: HERGT Martin - Siemens AG - GERMANY |
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| 0259-epe2025-full-10491336.pdf |
| For the design of fast-switching inverters a precise model of power semiconductors is required. Based on pulsed S-parameter measurements in the frequency range of 2 MHz to 500 MHz a SiC MOSFET and a GaN HEMT have been characterized. As basis for precise modelling, measurements under varying load conditions have been taken for many operating points covering the pinch-off, ohmic, and active regions. The employed model to describe the transistor uses a circuit comprising 12 circuit elements. Thereby, the elements of the intrinsic transistor vary with the transistor’s operating point and parameters describing the influence of the package are considered to be constant. The model parameters have been adjusted iteratively. A comparison of the obtained model with the original S-parameter measurements exhibits an excellent match. |
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| 034 - Test Setup for Measuring the Impact of Gate Stress on a GaN-HEMT's Output Characteristic |
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BREIDENSTEIN Daniel(1), ROESEL Sophia(1), KOHLHEPP Benedikt(2), DUERBAUM Thomas(1)
(1)FRIEDRICH-ALEXANDER-UNIVERSITY ERLANGEN-NUREMBERG - GERMANY
(2)TECHNICAL UNIVERSITY OF BERLIN - GERMANYPresented by: BREIDENSTEIN Daniel - FAU Erlangen - GERMANY |
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| Presented by: BREIDENSTEIN Daniel - FAU Erlangen - GERMANY |
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| 0034-epe2025-full-11371142.pdf |
| Precisely estimating conduction losses requires knowledge of the device's output characteristic in the ohmic region. For GaN-HEMTs, it dynamically depends on time, temperature, and applied biases. To study the impact of gate bias over time, a transient measurement approach is applied, that can acquire the start of the output characteristic with a single pulse. This ensures neglectable impact of temperature changes and trapping state on the single measurement. In addition, the short acquisition time allows studying the impact of the bias in the milliseconds range. Therefore, the measurement pulses are altered with stress intervals. While reference measurements for a traditional Si-MOSFET under constant gate bias show almost no change in the output characteristic over time, test results for a commercial GaN-HEMT reveal changes for low gate voltages. This demonstrates that the user should at least be aware of such trapping problems effecting measurements, which may lead to differences in characterization and application. |
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| 040 - Characterization of an Integrated GaN Driver for Power Switching Applications |
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KOHLHEPP Benedikt(1), HALHOUL Houssam(2), WIECZOREK Nick(1), GENG Xiaomeng(1), SCHELLHASE Lars(2), HILT Oliver(2), DIECKERHOFF Sibylle(1)
(1)TECHNICAL UNIVERSITY OF BERLIN - GERMANY
(2)FERDINAND-BRAUN-INSTITUT - GERMANYPresented by: KOHLHEPP Benedikt - Power Electronics, TU Berlin - GERMANY |
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| Presented by: KOHLHEPP Benedikt - Power Electronics, TU Berlin - GERMANY |
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| 0040-epe2025-full-15523579.pdf |
| Modern GaN-HEMTs require appropriate driving circuits to enable fast switching. Thus, monolithic integration of power switches and gate drivers is necessary. Therefore, this paper demonstrates a GaN driver to control a GaN power switch. Besides static and pulsed characterization, the driver’s performance is validated through continuous switching tests, demonstrating effective operation with turn-on and turn-off times of an emulated load of 1.68 ns and 1.84 ns, respectively. |
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| 122 - Losses Evaluation on Parallel Diodes Using a Double Pulse Test Circuit |
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HENN Gustavo(1), RAYMOND-LARUINA Frédéric(2), DE OLIVEIRA FILHO Herminio(1), PHULPIN Tanguy(3)
(1)UNILAB - UNIVERSIDADE DA INTEGRACAO INTERNACIONAL DA LUSOFONIA AFRO-BRASILEIRA - BRAZIL
(2)EDF R&D - FRANCE
(3)GEEPS - FRANCE |
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| 0122-epe2025-full-17500056.pdf |
| This paper aims to optimize efficiency by combining diodes, such as SiC Schottky or PiN Si in parallel. For each combination, conduction and switching losses are estimated using datasheet in addition to double pulse test circuit validation. The parallelization of each diode is studied to propose the best configuration. |
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| 126 - Parasitic Capacitances Effect on Transient Current Sharing in Parallel Connection of GaN FETs |
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MUSUMECI Salvatore(1), BARBA Vincenzo(1), PASTORELLI Michele(1), PALMA Marco(2)
(1)POLITECNICO DI TORINO - ITALY
(2)EFFICIENT POWER CONVERSION - ITALY |
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| 0126-epe2025-full-13534822.pdf |
| The paper deals with the impact of parasitic capacitance on the switching operation of GaN FET devices in parallel connection. A suitable experimental board has been developed to investigate the switching transient current share features for several GaN FETs connected in parallel to perform a single high-current switch. Every device can be driven independently, and a source shunt per each GaN FET monitors the transistor current. Simulation runs and experimental tests show the switching mechanism and parameters involved in the transients’ current share. The paper aims to give insights into the designing boards of paralleled GaN FETs regarding the influence of parasitic capacitances in the transient current peak distribution to find the maximum parasitic capacitance reachable without overcoming the limit of impulsive device current. The study contributes to developing reliable power modules made of several GaN FETs in parallel connection. |
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| 169 - Using SiC JBS diode as voltage clamping in SSCB application: performances and limitations |
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TOURNIER Dominique(1), BROSSELARD Pierre(2), BEVILACQUA Pascal(2), DEPALMA Jean-François(1)
(1)MERSEN - FRANCE
(2)UNIVERSITE DE LYON, INSA LYON, AMPERE - FRANCEPresented by: TOURNIER Dominique - MERSEN - FRANCE |
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| Presented by: TOURNIER Dominique - MERSEN - FRANCE |
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| 0169-epe2025-full-09213302.pdf |
| The performances and limitation of SiC JBS diodes used as clamping devices for SSCB have been investigated trough simulation and experimental measurements. The simulations evaluations are based on CAD and electro-thermal circuit modelling of packaged devices. The simulations have been done on a wide blocking voltage range, form 80V to 1.7kV. An optimal trade-off in terms of layout and avalanche capability has been found. A failure criterion in terms of power density has been established, linked to device top metal layers melting (around 500°C) and measured on commercial devices. Avalanche to Nominal current Ratio varies between 6 up to 10 depending on the manufacturer. A LTspice electro-thermal model allows to predict the required SiC devices area to achieve specific performances. Finally, a demonstrator of 1.2kV-2x50A-SOT227 SiC JBS clamping diode is presented. |
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| 176 - Maximize advantages in hard and soft-switching applications with optimal use of a modern SiC MOSFET with low output capacitance |
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YEON Jaeeul(1), AKBAR Syeda Qurat ul ain(1), WU Qibin(2)
(1)INFINEON TECHNOLOGIES AUSTRIA AG - AUSTRIA
(2)INFINEON TECHNOLOGIES AUSTRIA AG - CHINA |
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| 0176-epe2025-full-12300612.pdf |
| Silicon carbide (SiC) MOSFETs have superior properties at high voltage and high power compared to silicon (Si) devices in almost all aspects due to their material advantages such as three times larger band gap, three times larger thermal conductivity, ten times higher critical electric field, two times higher saturation velocity and so on. SiC MOSFETs can thus significantly improve the performance of the system. In addition to the well-known advantages of SiC MOSFETs over Si MOSFETs and IGBTs, a deeper understanding and right usage of SiC MOSFETs can help enhance device performance and maximize system value propositions. In this paper, a parameters-oriented approach is proposed to select the right SiC MOSFET device corresponding to the requirements of each application. The proposed approach has been validated by PLECS simulation results of representative hard and soft switching applications. |
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| 183 - High temperature characterizations of a monolithic 900 V GaN power device for current source inverter applications |
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NGUYEN Van-Sang(1), ESCOFFIER René(2), CATELLANI Stephane(1), BIER Anthony(1)
(1)CEA-INES - FRANCE
(2)CEA - COMMISSARIAT A L'ENERGIE ATOMIQUE (GRENOBLE) - FRANCEPresented by: NGUYEN Sang - CEA - France - FRANCE |
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| Presented by: NGUYEN Sang - CEA - France - FRANCE |
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| 0183-epe2025-full-10082335.pdf |
| Based on the recent works [1-4] on the current source inverter for photovoltaic (PV) application with Silicon Carbide (SiC) devices, this work presents the design and the characterizations of a monolithic GaN (Gallium Nitride) device where the GaN transistor and the diode in series connection are built up on a single chip for a specific current source inverter topology. This work presents the details of this monolithic 900 V GaN device in the first section, and then the static characterizations by using of an automatic industrial equipment (B1506 from Keysight) with a high temperature thermostream will be shown in the second section. A specific double pulse test-bench is detailed for high temperature dynamic characterization with the high speed current and voltage probes, this monolithic GaN device can be heated-up locally up to 175°C by using an infrared beam station. |
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| 261 - SiC MOSFET turn-off overvoltage measurement |
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GALDEANO Mikel(1), BARRIOS Ernesto Luis(1), ELIZONDO-MARTINEZ David(1), SANCHIS Pablo(1)
(1)PUBLIC UNIVERSITY OF NAVARRE - SPAINPresented by: GALDEANO Mikel - UPNA - SPAIN |
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| Presented by: GALDEANO Mikel - UPNA - SPAIN |
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| 0261-epe2025-full-11430976.pdf |
| Selecting the appropriate measurement system is crucial in power electronics. This is especially important during MOSFET’s turn-off process, where it is essential to measure the voltage rise and accurately capture the peak overvoltage. During turn-off, the interaction between the MOSFET and the parasitic element of the PCB creates a resonance. This phenomenon leads to an overvoltage, which peaks at the resonance frequency and can potentially damage the device. This paper discusses the characteristics of the measurement system needed to capture the peak overvoltage accurately. A step-by-step guide is proposed to ensure the correct selection of the probe and its correct use. This guide is experimentally validated on a three-level converter, where drain-source voltage measurements have been performed with and without a ground reference. The drain to source measurement method proposed in this paper is accurate, cost-effective and capable of minimizing induced noise. |
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| 309 - Static vs. Dynamic Characterization of p-GaN HEMTs: Discrepancies in Electrical Characteristics and their Dependence on Bias History |
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ROCHE Ludovic(1), TRÉMOUILLES David(1), MARCAULT Emmanuel(2), ALONSO Corinne(1)
(1)LABORATOIRE D'ANALYSE ET D'ARCHITECTURE DES SYSTEMES DU CNRS - FRANCE
(2)CEA OCCITANIE - FRANCEPresented by: ROCHE Ludovic - LAAS-CNRS - CEA Occitanie - FRANCE |
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| Presented by: ROCHE Ludovic - LAAS-CNRS - CEA Occitanie - FRANCE |
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| 0309-epe2025-full-15325282.pdf |
| Quasi-static electrical characteristics of p-GaN HEMTs fluctuate with bias history. This study evidences that dynamic operation is fortunately highly reproducible without pre-conditioning. The original experimental setup highlights that quasi-static data alone is insufficient for modeling dynamic behavior, while allowing precise detection of discrepancies, enabling improved transient modeling. |
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| DS1l - Topic 7: Integration and Packaging |
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Chair(s):
LUTZ Josef - TU Chemnitz - GERMANY |
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| 109 - A method for detecting the start of delamination at the corners of solder joint in a 3D PCB Integration Assembly of MOSFET SiC |
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BOUZERD Souhila(1), DUPONT Laurent(1)
(1)SATIE LABORATORY - FRANCEPresented by: BOUZERD Souhila - SATIE - FRANCE |
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| Presented by: BOUZERD Souhila - SATIE - FRANCE |
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| 0109-epe2025-full-09384097.pdf |
| The article discusses a method for evaluating the delamination initiation at solder joint corners in a 3D assembly of SiC MOSFETs integrated into a PCB substrate to design a half bridge. This assembly leads to soldering two metallic materials and addresses the integration of small active chips with larger heat-sinks. This technological development is part of the perspective of evaluating the robustness of a new assembly model for wide band Gap components. This assembly consists of metallic base-plate corresponding to the heat-sink soldered on the copper foil of a PCB substrate. Conventional methods fail to detect delamination initiation effectively due to the optimized commutation cell design. Finite element simulations are carried out to assess the sensitivity of another method. Then, prototypes with controlled delamination rate are developed. The results demonstrate that electrical method is sensitive to detect the low delimitation rates comparing to thermal method. |
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| 190 - Effects of Removing Bottom-side Copper in Baseplate-less Power Modules |
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KRISTENSEN Nikolaj(1), IVERSEN DEICHGRAEBER Jakob(1), BRACKOVIC Kerim(1), BECZKOWSKI Szymon(1), MUNK-NIELSEN Stig(1), BJØRN JØRGENSEN Asger(1)
(1)AALBORG UNIVERSITY - DENMARKPresented by: KRISTENSEN Nikolaj - AAU Energy - DENMARK |
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| Presented by: KRISTENSEN Nikolaj - AAU Energy - DENMARK |
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| 0190-epe2025-full-17293604.pdf |
Performance of SiC MOSFETs are limited by the
inherent parasitic elements originating from the
packaging structure. In this paper, the parasitic
capacitance of a 1.2 kV SiC MOSFET half-bridge
power module is significantly reduced by removing
the bottom-side copper, and the influence on
its electrical and thermal performance is experimentally
evaluated. Finally it is concluded that
even though the modified module show significant
advantages in turn-on switching energy, an
increase in turn-off energy offsets it while also
achieving a worse thermal performance. |
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| DS1m - Topic 7: Cooling Circuits and Thermal Management |
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Chair(s):
LUTZ Josef - TU Chemnitz - GERMANY |
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| 121 - Improving thermal management of SiC MOSFET through cold plates and/or power modules optimization |
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CHERIEF Wahid(1), CASADO RAMONEDA Aitor(2), GIOLAT Jérôme(1), AVENAS Yvan(3), KHAZAKA Rabih(2), DEBEZE Mickael(1)
(1)MERSEN - FRANCE
(2)SAFRAN TECH - FRANCE
(3)G2ELAB CNRS/G-INP/UGA - FRANCE |
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| 0121-epe2025-full-19274056.pdf |
| An experimental and numerical investigation on the impact of internal heat spreader and optimized cold plate for cooling SiC power module is presented. Silver-diamond (AgD) composites are used as heat spreaders under the SiC chips, while the cold plates are fitted with specific geometries to enhance convective heat transfers. This study is conducted for a flow regime varying from 500 < Reynolds < 8000. Thermal results show that the use of heat spreaders induces a 20% reduction of Rth(j-a). Similarly, an optimized cold plate design would reduce the cold plate thermal resistance by more than 55%. The study demonstrates that the heat spreader efficiency is better in the case of the use of an optimized design cold plate. |
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| DS1n - Topic 7: Reliability and Life-Cycle Assessment |
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Chair(s):
LUTZ Josef - TU Chemnitz - GERMANY |
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| 251 - A Real-time Condition Monitoring Technique for SiC MOSFET Gate Oxide Degradation Based on Turn-Off Delay Time Interval |
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JAZAYERI Seyed Mojtaba(1), NAGHIBI Javad(1), MOHSENZADE Sadegh(2), MEHRAN Kamyar(1)
(1)QUEEN MARY UNIVERSITY OF LONDON - UNITED KINGDOM
(2)K.N. TOOSI UNIVERSITY OF TECHNOLOGY - IRANPresented by: JAZAYERI Seyed Mojtaba - QMUL - UNITED KINGDOM |
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| Presented by: JAZAYERI Seyed Mojtaba - QMUL - UNITED KINGDOM |
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| 0251-epe2025-full-16423036.pdf |
| Gate oxide degradation can be regarded as one of the major categories of chip-related reliability issues in Silicon Carbide MOSFETs. This paper proposes an online condition monitoring technique (CMT) based on turn-off delay time as a precursor for gate oxide degradation. The method is real-time and does not need any change into the device's normal operation. The experimental results showed the proposed technique can provide a high-resolution assessment of the gate oxide degradation level of the device. |
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| DS1o - Topic 8: Magnetic Components – Inductors and Transformers |
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Chair(s):
DOPPELBAUER Martin - KIT - ETI - GERMANY |
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| 012 - Reconfigurable single-layer air coil inductor with bistable compliant windings |
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SELIGER Norbert(1), LEIRICH Nico(1)
(1)TECHNICAL UNIVERSITY OF APPLIED SCIENCES ROSENHEIM - GERMANYPresented by: SELIGER Norbert - TH Rosenheim - GERMANY |
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| Presented by: SELIGER Norbert - TH Rosenheim - GERMANY |
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| 0012-epe2025-full-10421480.pdf |
| We present an air coil with bistable compliant single layer windings. Due to stable elastic snapping deformation of wire segments, the self-inductance of the air coil can be precisely varied in multiple steps. A numerical and analytical design methodology is proposed and successfully validated by magneto-quasi-static field simulations and experiments on prototypes. |
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| 018 - Integrating PV Systems with Non-Standard Grid Voltages: The Need for Low-Induction Transformers |
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BADRI José Antonio(1), RIBA Jordi-Roger(1), GARCIA Antoni(1), TRUJILLO Santi(2), MARZÀBAL Albert(2)
(1)UNIVERSITAT POLITECNICA DE CATALUNYA - SPAIN
(2)SALICRU - SPAINPresented by: BADRI José Antonio - UPC - SPAIN |
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| Presented by: BADRI José Antonio - UPC - SPAIN |
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| 0018-epe2025-full-09470750.pdf |
| Installing grid-connected photovoltaic (PV) systems is challenging in regions with non-standard grid voltages, as PV inverters are designed for standard levels. To overcome this limitation, transformers can be used, but their inrush current often trips inverter protection. This paper explores this issue, emphasizing the need for specially designed low-induction transformers. |
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| 095 - Mission-Profile Based Reliability Framework for Medium-Frequency Transformers |
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MELIGY Ahmed(1), COELHO-MEDEIROS Rafael(1), COLAK Ilknur(1), SEDDIK Bacha(2)
(1)SCHNEIDER ELECTRIC - FRANCE
(2)UNIV GRENOBLE ALPES - G2ELAB - FRANCEPresented by: MELIGY Ahmed - Schneider Electric - FRANCE |
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| Presented by: MELIGY Ahmed - Schneider Electric - FRANCE |
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| 0095-epe2025-full-10141749.pdf |
| This paper presents a theoretical framework for assessing the reliability of medium frequency transformers by dividing their structure into dielectric regions and forecasting its lifetime based on mission profiles. The framework incorporates both random failure and wear-out analysis to provide reliability estimates, highlighting specific failure mechanisms associated with high-frequency switching and insulation stresses. A case study of a 200 kW, 15 kHz dual active bridge converter is presented to demonstrate the proposed methodology. The derived lifetime distribution can support the design of the medium-frequency transformer and help evaluate the related risk of unreliability. |
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| 159 - Development of High-Frequency Molded Transformer for SST with Simultaneous Insulation and Forced Air-Cooling capabilities |
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YONETOMI Ritsuki(1), KUSAKA Keisuke(1)
(1)NAGAOKA UNIVERSITY OF TECHNOLOGY - JAPANPresented by: YONETOMI Ritsuki - Nagaoka Univ. of Tech. - JAPAN |
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| Presented by: YONETOMI Ritsuki - Nagaoka Univ. of Tech. - JAPAN |
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| 0159-epe2025-full-02065772.pdf |
This paper proposes a new plastic mold structure for medium-frequency molded transformers used in solid-state transformers (SSTs), aiming to enhance both the cooling performance of windings and insulation capabilities. In medium-frequency transformers for 6.6-kV SST, high-voltage insulation performance is required between the primary and secondary windings. Therefore, insulation should be provided by molding around the windings. In contrast, an effective cooling method for windings is necessary because copper losses in the windings also increase as the operating frequency rises.
In this paper, temperature rise in the windings, which is a problem in medium-frequency molded transformers, is addressed by applying plastic molding only to the high electric field generating part in a structure that allows efficient cooling. Experimental results show that the developed transformer, which has a power density of 12.6 kW/L, continuously transmit 37.5 kW with a maximum transmission efficiency of 99.2%. In addition, partial discharge tests of the developed transformer show that it has sufficient insulation performance for SST with a 6.6-kV input. |
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| 162 - Overview, Comparison and Extension of Concepts for Current-Controlled, Adjustable Inductances |
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SCHIERLE Guido(1), PFEIFFER Jonas(2), HOFFMANN Klaus F.(1)
(1)HELMUT SCHMIDT UNIVERSITY - GERMANY
(2)SUMIDA COMPONENTS & MODULES GMBH - GERMANY |
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| 0162-epe2025-full-15335776.pdf |
Magnetic components are an important part of many DC/DC converters. The use of active premagnetization makes them adjustable, which means an additional degree of freedom in the design of the respective converter topology. However, when selecting the most suitable premagnetization method for the specific application, various impact factors should be taken into account to ensure an optimal design.
This paper presents, analyzes and discusses impact factors such as the adjustability range of the inductance value, the magnetic feedback as well as the behaviour of the auxiliary circuit for different premagnetization methods and different inductor design approaches. The measurement verification was carried out using a buck converter. |
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| 173 - 2D FEM Modeling Comparison of Multi-Winding Magnetic Couplers for Power Electronics Applications |
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CASSIN Floran(1), MERCIER Adrien(1), LABOURÉ Éric(1), DALBAVIE Jeanne-Marie(2), GOMEZ Patrice(2)
(1)GDR SEEDS, GEEPS, UNIVERSITE PARIS-SACLAY - FRANCE
(2)IKOS LAB - FRANCEPresented by: CASSIN Floran - GeePs, Paris-Saclay - Ikos Lab - FRANCE |
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| Presented by: CASSIN Floran - GeePs, Paris-Saclay - Ikos Lab - FRANCE |
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| 0173-epe2025-full-17224825.pdf |
| Multiple-Active Bridge (MAB) converters, an extension of Dual-Active Bridge (DAB) converters, have emerged as a promising approach for multi-source, multi-load energy exchanges. A critical factor in their performance is the design of the multi-windings magnetic coupler, which determines the equivalent inductances and consequently the power flow between ports. This paper presents 2D FEM modeling techniques for multi-windings magnetic couplers, comparing various geometries models to balance precision and speed. The air gap-free FEM geometry reduces simulation time while maintaining accuracy, whereas the two stretched models involve a trade-off between precision on electrical model parameters. |
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| 256 - Innovative Flyback Transformer Design : Enhancing Efficiency and Reducing Harmonic Current |
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MO Wai Keung(1), PAASCH Kasper M(1), EBEL Thomas(1)
(1)THE UNIVERSITY OF SOUTHERN DENMARK - DENMARKPresented by: MO Wai Keung - University of Southern Denmark - DENMARK |
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| Presented by: MO Wai Keung - University of Southern Denmark - DENMARK |
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| 0256-epe2025-full-13073509.pdf |
| A novel flyback transformer design reduces harmonics and improves efficiency. It use two auxiliary windings and a curved air gap. Simulations and experiments show significant improvements compared to traditional designs. Future research will focus on optimizing the design for various applications and power levels. |
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| DS1p - Topic 8:Dielectric and Interconnecting Components – Capacitors, Insulators, Cables, PCBs, Bus Bars |
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| 008 - New DC-Link bus bar and capacitors integration for 800V inverter |
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BERNARDINO Kévin(1), FOUET Thomas(1)
(1)MERSEN - FRANCE |
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| 0008-epe2025-full-14223495.pdf |
| E-mobility faces an increasing need to enhance the performance of electric vehicles (EV). In this context, a project is underway to develop an 800V inverter with high power density. This article focuses on the development of a new DC-Link system, including laminated bus bars, capacitors, and cooling components. The main challenge was meeting capacitance and inductance requirements, within limited volume and thermal limitations of assembled components. This development has resulted in characterized prototypes, validating the results obtained from preliminary simulations. Optimized thermal management ensures the DC-Link temperature is controlled, guaranteeing capacitors lifespan up to 40,000h for an inverter with a nominal voltage up to 900V. This work also includes the Life Cycle Assessment (LCA) of the product, showing that 96% of the greenhouse gases emitted by the product are produced during its operating phase. |
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| 333 - A high voltage, high current transmission-line-pulse testbench for the reliability investigation of deep depletion, metal-insulator-semiconductor trench capacitors |
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GILLOT Camille(1), ESCOFFIER René(2), ALLARD Bruno(1), BUFFLE Larry(3), VOIRON Frédéric(3)
(1)LABORATOIRE AMPERE - CNRS - FRANCE
(2)CEA - COMMISSARIAT A L'ENERGIE ATOMIQUE (GRENOBLE) - FRANCE
(3)MURATA INTEGRATED PASSIVE SOLUTIONS - FRANCEPresented by: GILLOT Camille - INSA Lyon - CEA Leti - FRANCE |
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| Presented by: GILLOT Camille - INSA Lyon - CEA Leti - FRANCE |
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| 0333-epe2025-full-15310318.pdf |
This paper presents a work-in-progress design of a transmission-line-pulse testbench (TLPTB) for the investigation of the reliability of deep depletion, on-metal insulator semiconductor (MIS) capacitor at wafer level scale.
Firstly, we describe the capacitor (DUT) and the targeted application requiring the investigation of reliability: a snubber for wide-band gap (WBG) transistor. Then we explain the capacitor ageing mechanism induced specifically in the snubber application. We need to stress the capacitor repeatedly under high voltage (1000 V) and high current (100 A). The TLPTB is suitable for such stress pattern. The design is based on SPICE simulation prior to a board layout design. The theoretical subsection describes the expected stress sequence. The physical implementation is discussed along with a measurement setup. |
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12:00 – 12:15 Mersen Solutions for Power Management Jérome Michoux - Business Development & Marketing Manager The megatrends around the new era of electrification are pushing back the boundaries of power distribution, and this fast-changing world is creating new constraints for passive components. Let’s go through them by analysing different applications and see how MERSEN is able to support customers in meeting these new technical and industrial requirements and how the collaboration with partners helps. |
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13:50 - 14:05: Typhoon HILTyphoon HIL Fully-Integrated Toolchain: Streamlining the Development Cycle from Offline to HIL Simulation Dr. Caio Osório Typhoon HIL Fully-Integrated Toolchain - Learn how Typhoon HIL solutions simplify the adoption of model-based engineering, enabling you to accelerate development, reduce costs, and enhance the reliability of your projects. With Typhoon HIL’s fully integrated toolchain, engineers can design, test, and optimize controllers while seamlessly transitioning from offline simulations with TyphoonSim to high-fidelity HIL testing using flagship real-time simulators—enabling simulation, validation, and continuous testing from the very beginning.
14:35 - 14:50: Hitachi Energy Advanced Semiconductor Solutions for High-Demand Applications: Progress and Future Trends by Hitachi Energy Virgiliu Botan, Global Product Manager |
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| Gaston Berger Amphitheatre |
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Chair(s):
DWORAKOWSKI Piotr - SuperGrid Institute - FRANCE |
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| 364 - The role of HVDC in reducing carbon emissions |
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DAVIDSON Colin(1)
(1)GE GRID SOLUTIONS - UNITED KINGDOM |
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| 0364-epe2025-full-13531794.pdf |
High-Voltage Direct Current (HVDC) is the most high-power application of power electronics. HVDC has been commercially available as a niche technology in power grids for 70 years, first using Line-Commutated Converters and, in the last 25 years, using Voltage-Sourced Converters. However, in the last five years the growth of HVDC has been spectacular, much of it associated with the large-scale integration of renewable energy sources. HVDC has been used for decades to connect remote hydro generating stations to load centres. More recently, HVDC allows offshore wind farms to be built far from shore, where the wind is stronger and steadier, beyond the maximum distance over which the power can be efficiently transmitted using AC cables. HVDC is now starting to be used for connecting large-scale solar parks to the grid. HVDC also allows long-distance interconnectors to be built between neighbouring power grids so that local fluctuations of renewable energy output can be smoothed out by aggregating power generation over a wider geographical area.
With this growth comes new challenges. Two in particular will be discussed in the talk. The first concerns the transition from point-to-point HVDC links (the established practice)) to multi-terminal HVDC networks. The second concerns how the HVDC converters are controlled, especially in view of the fact that the growth of renewable energy sources means that power grids now contain far less rotating inertia in the form of synchronous machines than was the case 20 years ago. The first challenge involves new protection methods and new types of HVDC equipment, while the second involves new control algorithms for the HVDC converters. Both challenges make HVDC a fascinating and important topic for the industry. |
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| LS2a - Topic 9 - AC/DC and DC/AC Converter Topologies (II) |
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| Gaston Berger Amphitheatre |
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Chair(s):
HEGAZY Omar - Vrije Universiteit Brussel - BELGIUM
EL BAGHDADI Mohamed - Vrije Universiteit Brussel - BELGIUM |
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| 185 - Investigations on Phase-Modular PFC with Integrated DC-link Energy Buffer for Single-Phase Operation |
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IURICH Mattia(1), VOLLMAIER Franz(1), LANGBAUER Thomas(1), HUANG Zhen(1), PETRELLA Roberto(1)
(1)SILICON AUSTRIA LABS GMBH - AUSTRIAPresented by: IURICH Mattia - Silicon Austria Labs - AUSTRIA |
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| Presented by: IURICH Mattia - Silicon Austria Labs - AUSTRIA |
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| 0185-epe2025-full-13485211.pdf |
In this paper a two-stage bidirectional Power Factor Correction (PFC) boost-buck topology featuring a novel built-in energy storage buffer functionality is proposed, specifically tailored for (isolated) OBC applications.
Main concept idea is to allow a certain amount of voltage oscillation at twice the line frequency at the output of the boost PFC stage (allowing a significant reduction of the dc-bus capacitor), and let the cascaded step down converter, namely the SCB-PPB, to dynamically absorb the pulsating energy, aiming at supplying a stiff voltage for the multi-port DCX stage feeding the battery.
The topology incorporates modular single-phase TP modules that deliver 3.6kW each in a three-phase set-up, or can be configured in parallel for single-phase operation at 2.4kW each, resulting in total output powers of 11kW and 7.2kW, respectively.
The proposed active buffer solution allows enhancing the power density of the system, by minimizing the capacitor size, and makes use of varied semiconductor devices with breakdown voltages of 750V and 1.2kV.
A MOO process is adopted to seek for the most effective balance between bulk capacitance and inductive components against losses and switching frequencies, thus achieving peak power density.
Comprehensive analytical and simulation results are shown to validate the effectiveness of the proposal, together with a sketch of the actual experimental prototype. |
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| 214 - Construction and Application of a Five-Level Inverter for Maximum Power Point Tracking (MPPT) of the Photovoltaic (PV) |
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SIADATAN Alireza(1), SEPEHRINOUR Maryam(2), KARIMI Hamed(3)
(1)YORK UNIVERSITY - CANADA
(2)ALGOMA UNIVERSITY - CANADA
(3)KHATAM UNIVERSITY - IRANPresented by: SIADATAN Alireza - York University - CANADA |
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| Presented by: SIADATAN Alireza - York University - CANADA |
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| 0214-epe2025-full-23211995.pdf |
| Considering the high initial cost of a solar system, achieving maximum power output is crucial. In this paper, the Nemo conduction method is utilized to reach the maximum power point of an 80W solar module. This method is also used to supply power to an Ohmic inductor load from a five-level inverter with an active diode barrier at the output of a boost converter. With this setup, a two-level five-level inverter has been developed, and a predictive control method is employed to regulate the inverter, resulting in a five-level waveform at the output. The predictive control simulation successfully generates a five-level three-phase voltage while ensuring that the output current closely tracks the reference current and the voltage of the floating capacitors is controlled. The construction and simulation results demonstrate the accuracy and speed of locating the optimal point to maximize energy production. |
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| 277 - Model Predictive Current Control for G2V/V2G Bidirectional Operation of Onboard Charger |
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KOH Hyun-Gyu(1), KANG Tae-Seok(1), IRFAN Sami(2), CHOI Yeong-Jun(1)
(1)JEJU NATIONAL UNIVESITY - KOREA (REPUBLIC OF)
(2)CHUNG-ANG UNIVERSITY - KOREA (REPUBLIC OF)Presented by: KOH Hyun-Gyu - Jeju National University - KOREA (REPUBLIC OF) |
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| Presented by: KOH Hyun-Gyu - Jeju National University - KOREA (REPUBLIC OF) |
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| 0277-epe2025-full-10312754.pdf |
| This paper proposes a straightforward method using model predictive current control (MPCC) to achieve bidirectional power transfer in electric vehicle on-board chargers (OBCs). Unlike existing studies requiring separate controller structure changes and control gain adjustments for grid-to-vehicle (G2V) and vehicle-to-grid (V2G) modes, the proposed method enables seamless mode switching. Utilizing a totem-pole power factor correction (PFC) converter, with the primary leg switching at high frequency and the secondary leg at grid frequency, and a CLLC resonant converter, the system achieves soft switching and bidirectional power transfer. The proposed strategy maintains high power factor greater than 0.99 and input current total harmonic distortion (THD) less than 3% in G2V mode, ensures stable 180-degree phase-shifted power transfer in V2G mode, and maintains stable soft switching at the resonant frequency in both modes. |
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| LS2b - Topic 1 - Electromobility (II) |
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Chair(s):
BOUSCAYROL Alain - University of Lille - L2EP - FRANCE
VAN MIERLO Joeri - Vrije Universiteit Brussel - BELGIUM |
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| 006 - Vehicle-Driven Operation of an Adaptive IPT System with Tolerance to Large Magnetic Coupling Coefficient Variations |
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LÓPEZ-ALCOLEA Francisco Javier(1), MOLINA-MARTÍNEZ Emilio José(1), PARREÑO-TORRES Alfonso(1), GARCÍA-JIMÉNEZ Jaime(1), VAZQUEZ Javier(1), RONCERO-SÁNCHEZ Pedro(1)
(1)UNIVERSITY OF CASTILLA-LA MANCHA - SPAINPresented by: LÓPEZ ALCOLEA Francisco Javier - UCLM - SPAIN |
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| Presented by: LÓPEZ ALCOLEA Francisco Javier - UCLM - SPAIN |
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| 0006-epe2025-full-10361093.pdf |
| This paper proposes an adaptive operation of a bidirectional inductive power transfer (IPT) system designed for the wireless charging of electric vehicles (EVs). It is composed of two controllers and an expert control layer that monitors the operation, giving the system this adaptability feature. Experimental results demonstrate its correct operation. |
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| 166 - Design Considerations and Validation of a GaN e-HEMT-Based Cryogenic Power Converter |
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HAM Jisun(1), MAENG Junyeol(1), IM Chaemin(1), SEO Dongsu(1), KOO Jaheum(1), HAHN Seungyong(1), CUI Shenghui(1)
(1)SEOUL NATIONAL UNIVERSITY - KOREA (REPUBLIC OF)Presented by: HAM Jisun - Seoul National University - KOREA (REPUBLIC OF) |
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| Presented by: HAM Jisun - Seoul National University - KOREA (REPUBLIC OF) |
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| 0166-epe2025-full-17283491.pdf |
| As efforts to reduce CO2 emissions grow, cryogenic power electronic converters are gaining attention for applications in electric propulsion, aerospace, and superconducting technologies. This paper presents the design and experimental validation of a power converter using GaN enhancement-mode high electron mobility transistors (e-HEMTs) optimized for cryogenic environments. Losses and efficiency are compared at room temperature (RT) and cryogenic temperature (CT), highlighting the influence of temperature on device characteristics and converter performance. Results show significant loss reductions at CT, with air cooling for RT testing and liquid nitrogen for CT experiments. These findings demonstrate the viability of GaN e-HEMT-based converters in cryogenic applications. |
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| 175 - Comparative Stability Study of a Dual Active Bridge-Based Battery Charger with Advanced Modulation Schemes |
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SCOHIER Martin(1), DEBLECKER Olivier(1), BAKHSHIDEH ZAD Bashir(1)
(1)UNIVERSITY OF MONS - BELGIUMPresented by: SCOHIER Martin - UMons - BELGIUM |
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| Presented by: SCOHIER Martin - UMons - BELGIUM |
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| 0175-epe2025-full-19475052.pdf |
| Thanks to their galvanic isolation and bidirectional power transfer features, the Dual Active Bridge (DAB) converters can offer a promising solution for interconnecting battery chargers to emerging DC grid applications. When cascaded with LC filters, the charger stability can be affected by the impedance interactions caused by the closed-loop charging process. This is exacerbated by the wide range of operating points in terms of DC voltages as well as the numerous Modulation Schemes (MS). To address this, the current paper extends the averaged small-signal model to the case of a Constant Current Constant Voltage (CC-CV) charging process. A stability analysis method is proposed to compare Single, Extended, Dual and Triple Phase Shift MS during a charging cycle. Simulation results validate the proposed models and highlight the flaws of advanced MS under varying operating conditions. |
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| LS2c - Topic 2 - Smart grids and renewable energy (II) |
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Chair(s):
BENCHAIB Abdelkrim - SuperGrid Institute - FRANCE
DWORAKOWSKI Piotr - SuperGrid Institute - FRANCE |
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| 027 - Real-Time Power Loss Optimized Operationof a Solid State Transformer by Utilizing the Common-Mode Voltage |
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MERZ Tobias(1), MENGER Nikolas(1), SIEGEMUND Max-Emanuel(1), SCHWENDEMANN Rüdiger(1), HILLER Marc(1)
(1)KARLSRUHE INSTITUTE OF TECHNOLOGY (KIT) - GERMANYPresented by: MERZ Tobias - KIT ETI - GERMANY |
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| Presented by: MERZ Tobias - KIT ETI - GERMANY |
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| 0027-epe2025-full-10452618.pdf |
This article presents a general methodology
and a real-time solvable, analytical model for reducing the
total losses of the cells of a Solid-State Transformer (SST).
The efficiency is increased with the usage of the online
optimized common-mode voltage u_CM. Measurements on
a 400VAC to 750VDC, 45kW SST test bench verify the
calculation results and the operating principle of the
algorithm. A loss reduction of up to 20% is possible
without introducing additional restrictions to the SST. |
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| 168 - Off-Grid Wind Energy Conversion System with Supercapacitor-Assisted Control for Optimal Green Hydrogen Production |
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RAUSELL Eduardo(1), NAVARRO Gustavo(1), ARNALTES Santiago(2), BLANCO Marcos(3), LAFOZ Marcos(1), NÁJERA Jorge(1), URDA Valentín(1)
(1)CENTRO DE INV. ENERGETICAS, MEDIOAMBIENTALES Y TECNOLOGICAS - SPAIN
(2)UNIVERSITY CARLOS III OF MADRID - SPAIN
(3)CENTRO DE INV. ENERGETICAS, MEDIOAMBIENTALES Y TEC - SPAINPresented by: RAUSELL Eduardo - CIEMAT - SPAIN |
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| Presented by: RAUSELL Eduardo - CIEMAT - SPAIN |
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| 0168-epe2025-full-10063895.pdf |
| This paper presents and validates a novel control strategy for directly integrating wind energy conversion systems (WECSs) with electrolyzers (ELZs) in off-grid systems maximizing electrical power and hydrogen production. The study builds on previous research that directly integrates WECSs with ELZs, eliminating the need for energy storage systems by using the ELZ as a controllable load, managed through maximum power point tracking (MPPT). Although this approach has shown effective results, it also led to significant current fluctuations in the ELZ. The new contribution of this study is the integration of supercapacitors (SCs) and modification of the control to smooth current fluctuations in the ELZ, reducing its degradation and improving operational efficiency. Simulations demonstrate the effectiveness of this control strategy, showing enhanced power management and reduced current peaks as SCs absorb power surges. This reduces ELZ cycling and degradation, extending its lifespan and offering a possible cost-effective solution for green hydrogen production in remote or offshore locations. |
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| 332 - Application of Jellyfish Search Algorithm? for Reactive Power Planning-based Power Losses Minimization in Electrical Power Networks |
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HAKMI Sultan(1)
(1)JAZAN UNIVERSITY - SAUDI ARABIAPresented by: HAKMI Sultan - JAZAN UNIVERSITY - SAUDI ARABIA |
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| Presented by: HAKMI Sultan - JAZAN UNIVERSITY - SAUDI ARABIA |
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| 0332-epe2025-full-22485668.pdf |
This study investigates the application of the
Jellyfish Search Optimization (JFSO) algorithm for Reactive
Power Planning (RPP) to minimize power losses in electrical
power networks. The RPP problem is formulated as a multi
objective optimization task that seeks to reduce active power
losses and minimize the investment costs of reactive power
compensators. The performance of the JFSO algorithm is
benchmarked against Differential Evolution (DE) and Particle
Swarm Optimization (PSO) algorithms on the IEEE 30-bus
test system under two case studies: (1) minimizing active power
losses alone and (2) minimizing both losses and investment
costs. For minimizing the losses in Case 1, JFSO reduced
power losses from an initial 5.6 MW with 18.2% reduction,
compared to 16.8% for DE and 11.0% for PSO. In Case 2,
JFSO minimized the total costs to $2,391,466/year,
outperforming DE and PSO, which resulted in $2,435,863/year
and $2,629,826/year, respectively. The findings demonstrate
that JFSO offers superior optimization performance with
enhanced convergence properties. By effectively balancing
investment and operational costs, the proposed algorithm
provides a robust solution for efficient RPP. |
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| LS2d - Topic 7 - Reliability & Systems & Packaging |
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Chair(s):
LUTZ Josef - TU Chemnitz - GERMANY
KOHLHEPP Benedikt - Power Electronics, TU Berlin - GERMANY |
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| 059 - Good practices to sort 650 V GaN die inside a PCB |
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GUTIERREZ GALEANO Alonso(1), GUILLOT Laurent(2), HAMELIN Pierre-Yves(3), MARCAULT Emmanuel(1), ORSATELLI Marc(1), IZOULET Antoine(1), GAVELLE Mathieu(1), LAGADEC Aymeric(3)
(1)CEA - COMMISSARIAT A L'ENERGIE ATOMIQUE (GRENOBLE) - FRANCE
(2)STMICROELECTRONICS - ITALY
(3)ELVIA ELECTRONICS - FRANCEPresented by: GUTIERREZ GALEANO Alonso - CEA - FRANCE |
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| Presented by: GUTIERREZ GALEANO Alonso - CEA - FRANCE |
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| 0059-epe2025-full-14101969.pdf |
| This work studies the embedding of 650V d-mode GaN within a PCB using double-side microvias. The study begins with a comparison of electrical parameters before and after packaging in a sample of devices. This comparison aims to evaluate the packaging impact. After, all packaged devices are characterized and statistically classified. This classification allows detecting some parts with atypical values. X-ray tomography on these atypical parts highlight backside die delamination or voids on them. However, this failure detection method could be time-consuming. Therefore, this study proposes a method based on S-parameters for early failure detection. S-parameters analysis and test results on the identified backside delaminated devices reveal their tendency to have higher intrinsic capacitance. Finally, lessons learned through this study have led to propose some guidelines to improve the embedded PCB process for better sort practices. |
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| 029 - Low inductance power module optimized for Flying Capacitor Topology |
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LASSERRE Philippe(1), DUCHESNE Cyrille(1), GOPISHETTI Anusha(1)
(1)DEEP CONCEPT - FRANCEPresented by: LASSERRE Philippe - DEEP Concept - FRANCE |
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| Presented by: LASSERRE Philippe - DEEP Concept - FRANCE |
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| 0029-epe2025-full-17375430.pdf |
| In Renewable Energy domain, power converter require adapted solutions to increase electrothermal performances. In this paper, a high-performance packaging architecture is proposed, dedicated to a flying capacitor topology. Based on 750V SiC bare dies, interconnection technologies, materials and optimized design was established to obtain a dedicated power module, with the support of finite element modeling. A specific assembly process was developed with innovative tooling and was tested at the end of process by electrical static tests and Xray analysis. Power electrical performances was measured by double pulse test method. Electrical characterization and module simulation recovered the value of inductance close to 6nH. Next step is to evaluate the robustness of this new power module with campaigns of passive temperature cycling and power cycling to be performed. |
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| 063 - Power Cycling Reliability of Paralleled IGBT Chips Heated with Conduction and Switching Losses |
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ABUOGO James(1), LUTZ Josef(1), BASLER Thomas(1)
(1)CHEMNITZ UNIVERSITY OF TECHNOLOGY - GERMANYPresented by: ABUOGO James - TU Chemnitz - GERMANY |
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| Presented by: ABUOGO James - TU Chemnitz - GERMANY |
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| 0063-epe2025-full-12321046.pdf |
| The results of a power cycling test (PCT) of switches in a commercially available baseplate-less IGBT module with two paralleled chips are presented. The thermal imbalance between the two paralleled chips caused by direct bonded copper (DBC) substrate layout design was found to be the most influencing factor for lifetime of these switches. A modification of the DBC layout is suggested to homogenize thermal loading of the paralleled chips. |
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| LS2e - Topic 8 - Magnetic Components – Inductors and Transformers (II) |
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Chair(s):
VAN DEN BOSSCHE Alex - Ghent University - BELGIUM |
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| 196 - A Novel Optimization Method for Accurate AC resistance prediction of High Frequency Transformer |
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BARG Sobhi(1), BARG Souhaib(2), BERTILSSON Kent(1)
(1)MID SWEDEN UNIVERSITY - SWEDEN
(2)CENTRAL UNIVERSITY OF TUNIS - TUNISIA |
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| 0196-epe2025-full-10024321.pdf |
| Existing methods for high frequency design have two main limitations which significantly affect the design accuracy: (1) the choice of the suitable filling factor and (2) the inaccurate prediction of the Ac resistance. This paper proposes a novel numerical method to determine an accurate estimation of the Ac resistance and avoid the need of using the filling factor in the design process. The performed experimental results are in good agreement with the developed theoretical results. The study shows that the variation of the optimal B is the inverse of the root-mean-square core volume variation. |
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| 199 - Inductive, Capacitive and Resistive Aspects Modeling of Planar Windings Applied to a 1MHz LLC Converter |
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DIHANE Oussama(1), SADARNAC Daniel(2), PHULPIN Tanguy(2), LABOURÉ Éric(3), GASCHER Alain(1), SOBRAYEN Lingeshwaren(4)
(1)AMPERE S.A.S.-RENAULT GROUP - FRANCE
(2)GEEPS - FRANCE
(3)GDR SEEDS, GEEPS, UNIVERSITE PARIS-SACLAY - FRANCE
(4)ENERSYS - FRANCEPresented by: DIHANE Oussama - Oussama DIHANE - FRANCE |
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| Presented by: DIHANE Oussama - Oussama DIHANE - FRANCE |
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| 0199-epe2025-full-17591092.pdf |
| Planar transformers and inductors are subject to parasitic capacitances that can alter the operation of the converter using them. This article integrates capacitive aspects into conventional inductive and resistive modeling developed by Dowell. This leads to a relatively simple software program that enables fast simulation of planar components’ frequency behavior, predicts conductors’ current distribution, and deducts the resulting losses. Finally, an application example is proposed consisting of optimizing the design of a transformer by adjusting its windings, the nature of its materials, and the position of an air gap, to minimize current oscillations in the converter that could result from excessive parasitic capacitors. |
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| 201 - Modelling of Nanocrystalline Common-Mode Chokes with Custom Shape by Simulation-Based Extraction of Effective Permeability |
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HACKL Herbert(1), KONRAD Werner(1), STOIBER Martin(1), RIENER Christian(1), AUINGER Bernhard(1), HEINISCH Martin(2)
(1)SILICON AUSTRIA LABS GMBH - AUSTRIA
(2)BMW MOTOREN GMBH - AUSTRIAPresented by: STOIBER Martin - Silicon Austria Labs GmbH - AUSTRIA |
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| Presented by: STOIBER Martin - Silicon Austria Labs GmbH - AUSTRIA |
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| 0201-epe2025-full-14235030.pdf |
| Knowing the complex relative permeability of a ferrite or nanocrystalline core material is crucial to predict the insertion impedance of common-mode chokes. In practice, however, the material properties are often not known across the full desired frequency range. Additionally, factors like core shape, lamination and strip thickness influence the effective permeability and consequently the choke’s impedance behaviour. This paper presents a workflow to create core material models that can be used in electromagnetic simulations to estimate the impedance behaviour of common-mode chokes. The core’s material characteristics are determined by iteratively fitting model parameters to an impedance measurement using a generic laboratory setup. The resulting core model is then employed to predict the impedance of a common-mode choke in the intended application. |
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| Panel Discussion - Focus Topic 2 - Smart grids & renewable energy |
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Chair(s):
HEYBERGER Jean-Baptiste - SuperGrid Institute - FRANCE
DWORAKOWSKI Piotr - SuperGrid Institute - FRANCE |
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| Confirmed panelists:
* Benjamin Graff, CNR, “Linear Photovoltaic Powerplant: potential development in France and use cases at CNR” * Olivier Grellier, SNCF, “Linear Photovoltaïc: use cases at SNCF” * Thomas Lagier, ITER, “Power Converters for nuclear fusion applications at ITER” * Sébastien Silvant, SuperGrid Institute, “InterOPERA at Crossroads: Advancing Multi-Vendor HVDC Interoperability”
* Mohamed Rashwan, Transgrid Solution, keynote summary "HVDC and Power Electronics enabling the energy transition * Colin Davidson, GE Vernova Grid Systems Integration, keynote summary “The role of HVDC in reducing carbon emissions”
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