Fault Detection and Mitigation of DC/DC Converters with Semiconductor-Based Isolation for DC-EVSEs

Drexler K, Zhou Y, Wunder B, Lorentz V, März M (2025)

Publication Type: Conference contribution

Publication year: 2025

Publisher: IEEE

Pages Range: 1-6

Conference Proceedings Title: 2025 IEEE Seventh International Conference on DC Microgrids (ICDCM)

DOI: 10.1109/ICDCM63994.2025.11144678

Abstract

In larger electric vehicle (EV) charging parks supplied by a common DC bus, the galvanically isolated DC/DC converters usually used in the charging stations constitute a significant portion of the overall costs, size and losses. To reduce these costs, a DC/DC converter with semiconductor-based isolation is examined in this paper. To achieve a similar level of safety as galvanically isolated converters, faults within the converter must be detected and mitigated. A fault detection and mitigation strategy is therefore introduced, regarding always-on faults of semiconductors in order to enhance the safety aspects of this converter topology. A bidirectional 50 kW converter prototype is designed for the application of charging 400 V and 800 V EVs from an industrial 650 V DC-grid. The fault detection is validated with laboratory measurements. A comparison of the efficiency and power density of the Semiconductor-based Isolation (SCI) converter with a conventional converter is performed, revealing significant advantages of the proposed topology like a size reduction of approximately 33 %.

Authors with CRIS profile

Yan Zhou Lehrstuhl für Leistungselektronik (LEE) Martin März Lehrstuhl für Elektronische Bauelemente

Involved external institutions

Fraunhofer-Institut für Integrierte Systeme und Bauelementetechnologie (IISB) DE Germany (DE)

How to cite

APA:

Drexler, K., Zhou, Y., Wunder, B., Lorentz, V., & März, M. (2025). Fault Detection and Mitigation of DC/DC Converters with Semiconductor-Based Isolation for DC-EVSEs. In 2025 IEEE Seventh International Conference on DC Microgrids (ICDCM) (pp. 1-6). IEEE.

MLA:

Drexler, Kilian, et al. "Fault Detection and Mitigation of DC/DC Converters with Semiconductor-Based Isolation for DC-EVSEs." Proceedings of the 2025 IEEE Seventh International Conference on DC Microgrids (ICDCM) IEEE, 2025. 1-6.

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