Reduction of radiated electromagnetic interference in 4-phases pulse width modulation converter system

Author

Kim, Hee-Jung ; Kim, Hyun ; Ahn, Seung-Young ; Oh, Il-Young ; Yook, Jong-Gwan

Author_Institution

Dept. of Electr. & Electron. Eng., Yonsei Univ., South Korea

fYear

2008

fDate

10-12 Dec. 2008

Firstpage

39

Lastpage

42

Abstract

Radiated electromagnetic interference (EMI) in pulse width modulation (PWM) converter system is analyzed using discrete time Fourier series (DTFS) and a snubber circuit. The causes of radiated EMI are found through DTFS analysis of output waveform of switched voltage. By designing a snubber circuit with resistor (R) and capacitor (C) filter, overshoot and ringing of switched voltage are suppressed and the EMI is also reduced. The important factors are to minimize peak voltage and to reduce power dissipation in selecting of RC value. The design of snubber circuit is considered these points and measured EMI shows the improvement of 6 dBuV/m.

Keywords

Fourier series; electromagnetic interference; pulse width modulation; snubbers; 4-phases pulse width modulation converter system; DTFS; discrete time Fourier series; output waveform; peak voltage; power dissipation; radiated electromagnetic interference; resistor capacitor filter; snubber circuit; switched voltage; EMP radiation effects; Electromagnetic analysis; Electromagnetic interference; Fourier series; Pulse circuits; Pulse width modulation; Pulse width modulation converters; Snubbers; Time series analysis; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Advanced Packaging and Systems Symposium, 2008. EDAPS 2008. Electrical Design of

Conference_Location

Seoul

Print_ISBN

978-1-4244-2633-1

Electronic_ISBN

978-1-4244-2634-8

Type

conf

DOI

10.1109/EDAPS.2008.4735993

Filename

4735993