Journal
2021 IEEE 22ND WORKSHOP ON CONTROL AND MODELLING OF POWER ELECTRONICS (COMPEL)
Volume -, Issue -, Pages -Publisher
IEEE
DOI: 10.1109/COMPEL52922.2021.9645978
Keywords
DAB; modeling; magnetizing inductance; dual-active bridge converter; soft-switching
Categories
Funding
- Solar Energy Technologies Office of U.S. Department of Energy
- U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy (EERE) under the Solar Energy Technologies Office [34019]
- U.S. Department of Energy [EE0002064]
- DOE Public Access Plan
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This paper analyzes the operation and performance of the DAB converter with consideration of transformer magnetizing inductance, and shows that it impacts the soft-switching region, power transfer capability, and leakage inductor current. A simulation case study and experimental validation with a DAB converter prototype are provided to verify the analysis.
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.
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