2005•Proceedings of the CSEERequires access

ANALYSIS ON THE EMI EFFECT OF STRAY MAGNETIC FIELD FROM MAIN CIRCUIT OF A PFC SWITCHED MODE POWER SUPPLY

Jianguo Jiang

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.The magnetic coupling effect between a PFC inductor and an EMI common mode choke is studied by experiments after analyzing the stray magnetic field distribution characteristic of PFC inductor and the sensitivity of common mode choke.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 phenomena on L and N line is explained too.In the end,several measures are proposed to decrease DM emission and verified by experiments.

About this research paper

What this paper is about

Why it matters

OpenAlex reports 2 citations for this work. Citation counts describe recorded attention and do not establish research quality.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

Key concepts: Choke, EMI, Inductor, Electromagnetic interference, Electrical engineering, Common-mode signal, Coupling (piping), Attenuation