Identification and Model of Near Field Magnetic Coupling in a PFC Converter

Author

Junping, He ; Jianguo, Jiang ; Wei, Chen

Author_Institution

Dept. of Electr. Eng., Tsinghua Univ., Beijing

fYear

2005

fDate

16-16 June 2005

Firstpage

323

Lastpage

327

Abstract

The attenuation characteristic of on board EMI filter may be deteriorated greatly by the stray magnetic field produced by main circuit of switched mode power supply. In this paper, the magnetic coupling effect between a PFC inductor and an EMI common mode inductor is studied by experiments after analyzing the stray magnetic field distribution characteristic of PFC inductor and the sensitivity of common mode inductor. A differential mode EMI model of this PFC converter is built up, which includes the magnetic coupling effect. Based on this model, the coupling EMI component is distinguished. The unequal EMI emission phenomenon on L and N line is explained too. In the end, several measures are proposed to decrease DM emission and verified by experiments

Keywords

electromagnetic interference; inductors; magnetic fields; power convertors; power factor correction; sensitivity; switched mode power supplies; EMI common mode inductor; EMI filter; PFC converter; PFC inductor; differential mode EMI model; near field magnetic coupling; stray magnetic field; switched mode power supply; unequal EMI emission phenomenon; Attenuation; Coupling circuits; Electromagnetic interference; Filters; Inductors; Magnetic analysis; Magnetic circuits; Magnetic fields; Magnetic separation; Switched-mode power supply;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 2005. PESC '05. IEEE 36th

Conference_Location

Recife

Print_ISBN

0-7803-9033-4

Type

conf

DOI

10.1109/PESC.2005.1581643

Filename

1581643