Mitigation of conducted EMI in quasi-resonant DC-DC converters by frequency modulation

Author

Junhong, Deng ; Vilathgamuwa, Mahinda ; Jet, Tseng King

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore

Volume

2

fYear

1996

fDate

6-10 Oct 1996

Firstpage

1117

Abstract

This paper describes the generation of conducted electromagnetic interference (EMI) in quasi-resonant DC-DC power converters (QRC). An EMI mitigation technique using frequency modulation is proposed along with experimental verification. The switching voltage and input current harmonic spectra are modelled in the frequency domain in order to quantify the amount of common mode and differential mode EMI at certain range of frequencies. The switching voltage and input current harmonic spectra are shown to be significantly depressed as a result of switching frequency modulation

Keywords

DC-DC power convertors; electromagnetic interference; frequency modulation; harmonic distortion; power system harmonics; resonant power convertors; switching circuits; conducted EMI mitigation; experimental verification; frequency domain; input current harmonic spectra; quasi-resonant DC-DC power converters; switching frequency modulation; switching voltage; DC-DC power converters; Electromagnetic interference; FCC; Frequency modulation; MOSFET circuits; Power harmonic filters; Switches; Switching converters; Switching frequency; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 1996. Thirty-First IAS Annual Meeting, IAS '96., Conference Record of the 1996 IEEE

Conference_Location

San Diego, CA

ISSN

0197-2618

Print_ISBN

0-7803-3544-9

Type

conf

DOI

10.1109/IAS.1996.560219

Filename

560219