Title :
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
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;
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
DOI :
10.1109/EDAPS.2008.4735993
