Magnetic Coupling Common Mode Conducted EMI Analysis and Improvement in a Boost Converter

被引：3
|
作者：
He, Junping [1 ]
Liu, Yujin [1 ]
Wang, Cong [1 ]
Cao, Lingling [1 ]
机构：
[1] Harbin Inst Technol, Power Elect Ctr, Shenzhen 518055, Peoples R China
来源：
WORLD ELECTRIC VEHICLE JOURNAL | 2021年 / 12卷 / 04期
基金：
中国国家自然科学基金;
关键词：
common mode conducted emission; stray magnetic coupling; mutual inductance extraction; boost converter; EMC design;
D O I：
10.3390/wevj12040225
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Common mode (CM) electromagnetic interference (EMI) has been a difficult subject in electromagnetic compatibility (EMC) analysis and design of power converters for electric vehicles (EV) because of its complex formation mechanism and hidden propagation path. This paper studies a new mechanism of CM conducted emission caused by the leakage flux of a toroidal inductor in the main circuit of a boost DC/DC converter. The stray magnetic source and the CM inducted loops are firstly identified out by simulation analysis and experiments. Then a comprehensive conducted emission circuit model including magnetic coupling parameters is built to explain this CM EMI formation mechanism. Finally, several effective magnetic coupling suppression methods are proposed and verified, such as changing the installation angle of the inductor and the shape of the magnetic core. The research results are helpful to the EMC understanding and design of power electronic converters.
引用
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页数：10
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