The influence of magnetic component on common-mode current in a boost converter

Author

Kchikach, M. ; Pong, M.H. ; Qian, Z.M.

Author_Institution

Dept. of Electr. Eng., Hong Kong Univ., Hong Kong

Volume

2

fYear

2000

fDate

2000

Firstpage

925

Abstract

Common mode current causes EMI in switching power supply. An inductor in a switching power supply is often connected to a node with high dv/dt and its influence on overall common mode current is investigated. In the present work it is discovered that an inductor does not produce much common mode noise compared to a MOSFET terminal. This is because the inductor core attracts an electric field from the windings and its capacitance to earth is reduced compared to one without a core. Simulation and experimental results, based on the emission map of the printed circuit board (PCB), are presented to clarify the ideas

Keywords

DC-DC power convertors; capacitance; electric current measurement; electromagnetic interference; inductors; printed circuits; switched mode power supplies; windings; EMI; MOSFET terminal; boost converter; capacitance to earth reduction; common mode current measurement; common-mode current; electric field; emission map; inductor; inductor core; magnetic component; printed circuit board; switching power supply; Circuit noise; Current measurement; Earth; Electromagnetic interference; Frequency; Inductors; MOSFET circuits; Parasitic capacitance; Power supplies; Switching converters;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Motion Control Conference, 2000. Proceedings. IPEMC 2000. The Third International

Conference_Location

Beijing

Print_ISBN

7-80003-464-X

Type

conf

DOI

10.1109/IPEMC.2000.884635

Filename

884635