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Impact of the Transformer Magnetizing Inductance on the Performance of the Dual-Active Bridge Converter...

by Shiyuan Yin, Suman Debnath, Rafal P Wojda, Phani Ratna Vanamali Marthi, Maryam Saeedifard
Publication Type
Conference Paper
Book Title
2021 IEEE 22nd Workshop on Control and Modelling of Power Electronics (COMPEL)
Publication Date
Page Numbers
1 to 7
Publisher Location
New Jersey, United States of America
Conference Name
Conference Location
Virtual, Tennessee, United States of America
Conference Sponsor
Conference Date

The magnetizing inductance of the high-frequency transformer in the dual-active bridge (DAB) converter is usually assumed to be much larger than its leakage inductance, thereby the magnetizing current can be negligible. However, ignoring the magnetizing current will lead to an error in the DAB converter design process. This paper analyzes the operation and performance of the DAB converter for a general case in which the transformer magnetizing inductance is taken into consideration. The analysis shows that the magnetizing inductance impacts the soft-switching region, the power transfer capability, and the leakage inductor current. A simulation case study is provided to verify the analysis. A DAB converter prototype is built to experimentally validate the analysis as well.