A bidirectional and isolated DC/DC converter connecting mobile battery systems to a DC grid in commercial buildings

Schulz M, Wild M, Chacon R, Wunder B, März M (2019)

Publication Language: English

Publication Type: Conference contribution, Conference Contribution

Publication year: 2019

Event location: Singapur SG

ISBN: 978-1-7281-3154-2

DOI: 10.1109/IFEEC47410.2019.9014976

Abstract

This paper introduces a novel modulation scheme for an isolated DC/DC converter in step-down direction, which enables a wide input and output voltage range. Losses in the semiconductors on the 380 V bus side are reduced due to zero voltage switching. At charging the battery, the converter works as a buck converter. In this power flow direction the discontinuous and continuous conduction mode of the bidirectional converter are discussed. For a power flow from the safety extra low voltage respectively battery side the converter works in continuous conduction mode as a boost converter. After introducing the specification of the mobile battery application, the topology and the modulation scheme are presented. The operating behavior of the DC/DC converter and the EMI spectrum with the novel modulation scheme are shown to verify the feasibility of the proposed theory. The 500 W prototype of the converter achieves a high peak efficiency of 97.7% in step-down and of 97.5% in step-up direction.

Authors with CRIS profile

Bernd Wunder Lehrstuhl für Leistungselektronik (LEE) Martin März Lehrstuhl für Leistungselektronik (LEE)

How to cite

APA:

Schulz, M., Wild, M., Chacon, R., Wunder, B., & März, M. (2019). A bidirectional and isolated DC/DC converter connecting mobile battery systems to a DC grid in commercial buildings. In IEEE (Eds.), Proceedings of the 2019 IEEE IFEEC. Singapur, SG.

MLA:

Schulz, Matthias, et al. "A bidirectional and isolated DC/DC converter connecting mobile battery systems to a DC grid in commercial buildings." Proceedings of the 2019 IEEE IFEEC, Singapur Ed. IEEE, 2019.

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