期刊
IEEE TRANSACTIONS ON POWER ELECTRONICS
卷 37, 期 6, 页码 7013-7027出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2021.3133068
关键词
Magnetic cores; Magnetic flux; Inductors; Windings; Magnetic separation; Inductance; Magnetic circuits; High-frequency magnetic components; loss characteristic analysis; magnetic circuit orthogonal decoupling; magnetic integrated structure; optimal decoupling condition
资金
- 2020 State Grid Science Technology Project (Research Project: Research on the Key Technologies of High Efficiency and Compact Multi-Port DC Transformer) [SGJSDK00PW2000236]
- National Natural Science Foundation of China [51922028]
- DMC Co., Ltd.
- Am Magnetoelectric Technology Co., Ltd.
- Hefei Huayao Electronic Industry Co., Ltd.
This article proposes an orthogonal decoupling magnetic integrated structure (ODMIS) to reduce the volume of the transformer and inductor in a DAB converter. ODMIS achieves the magnetic decoupling of the transformer and inductor and provides optimized decoupling conditions to minimize core loss. Experimental results demonstrate that ODMIS has high overall efficiency and power density.
The volume of magnetic components (transformer and inductor) in a dual active bridge (DAB) converter is a crucial factor determining its power density. This article proposes an orthogonal decoupling magnetic integrated structure (ODMIS) for DAB converter, which aims to reduce the volume of the transformer and inductor. The integrated series inductor and magnetizing inductor do not affect each other in the ODMIS, so the design process of the transformer and inductor can be separated. The condition to realize magnetic circuits decoupling of the transformer and inductor is derived. The loss characteristics of the magnetic core are analyzed, and the optimal decoupling condition to minimize the core loss is also derived. A 400 V/6 kW/20 kHz DAB converter prototype is built to validate the effectiveness of the ODMIS. The measured full-load overall efficiency of the DAB test platform is 97.55%, and the power density of the magnetic integrated components is 10.08 kW/L. Finally, the prototype comparisons between the proposed ODMIS and two existing magnetic integrated structures and discrete magnetic component method are conducted, and the advanced feature of the ODMIS is illustrated.
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