Enhanced Efficiency and Power Density in Next-Gen Power Electronics Through Zero Overvoltage Switching

Schmied N, Kerscher M, Matlok S, Eckardt B, März M (2025)

Publication Type: Conference contribution

Publication year: 2025

Publisher: IEEE

City/Town: New York City

Pages Range: 1-6

Conference Proceedings Title: 2025 Energy Conversion Congress & Expo Europe (ECCE Europe)

Event location: Birmingham GB

DOI: 10.1109/ECCE-Europe62795.2025.11238816

Abstract

High-voltage power electronics, utilizing wide-bandgap devices, can realize superior efficiency and power density designs compared to silicon-based power electronics. The fast switching transitions of those devices lead to higher overvoltage peaks and voltage oscillations. Zero Overvoltage Switching (ZOS) combines the fast switching speed of wide-bandgap devices with the prevention of voltage oscillations. This paper examines the advantages of ZOS through the example of a dc-dc converter. It presents a simulation method that simulates the channel current inside the transistor, allowing further analysis of the resulting switching losses. For the first time, a comparison of switching losses is possible between a converter that applies ZOS and a conventional switching converter. The difference in switching losses is reflected in the efficiency difference measured on a 30 kW dc-dc converter prototype. Under identical operating conditions, ZOS achieves 47.4% lower losses at full load compared to the conventional switching variant.

Authors with CRIS profile

Nico Schmied Lehrstuhl für Leistungselektronik (LEE) Moritz Kerscher Lehrstuhl für Leistungselektronik (LEE) Stefan Matlok Lehrstuhl für Leistungselektronik (LEE) Bernd Eckardt Lehrstuhl für Leistungselektronik (LEE) Martin März Lehrstuhl für Elektronische Bauelemente

How to cite

APA:

Schmied, N., Kerscher, M., Matlok, S., Eckardt, B., & März, M. (2025). Enhanced Efficiency and Power Density in Next-Gen Power Electronics Through Zero Overvoltage Switching. In 2025 Energy Conversion Congress & Expo Europe (ECCE Europe) (pp. 1-6). Birmingham, GB: New York City: IEEE.

MLA:

Schmied, Nico, et al. "Enhanced Efficiency and Power Density in Next-Gen Power Electronics Through Zero Overvoltage Switching." Proceedings of the 2025 Energy Conversion Congress & Expo Europe (ECCE Europe), Birmingham New York City: IEEE, 2025. 1-6.

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