期刊
IEEE TRANSACTIONS ON POWER ELECTRONICS
卷 38, 期 1, 页码 510-522出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2022.3205773
关键词
Conducted electromagnetic interference (EMI); EMI filter; magnetic cores; magnetic integration
This article proposes a new method to integrate the dc and ac common mode inductors by magnetic coupling, aiming to shrink the volume of EMI filters. The advantage of volume reduction using this method is illustrated through modeling and experiments.
Using passive electromagnetic interference (EMI) filter to suppress the common mode (CM) noises on the dc and ac side of motor drive systems is a common filtering method. Shrinking the volume of CM inductors is the key to the miniaturization of EMI filters. In order to reduce the volume, this article proposes a new method to integrate the dc and ac CM inductors by magnetic coupling. The principle of the filter and the design constraints of coupled CM inductors are analyzed. The filter volume reduction advantage gained by using the proposed method is illustrated. A model is built to describe the relationship between the coupling coefficient and filtering performance. Finally, the procedures for design of coupled inductors are addressed and the results are verified by experiments. In the comparative case study, the volume of coupled inductor is 90% of that of discrete inductor.
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