Research on EMI Reduction of Interleaved Bridgeless Power Factor Corrector using Frequency Dithering

Qingnan Li, Ole Cornelius Thomsen, Michael A. E. Andersen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

This paper proposes a cost-efficient method to reduce the electromagnetic interference (EMI) of interleaved Bridgeless PFC (IBPFC) system in a wide frequency range by carefully
designing and utilizing frequency dithering. In this work, a valuable frequency dithering design is implemented for a 3.5kW universal line 2-stage IBPFC for class-D amplifiers. Detailed
evaluations of impacts on EMI reduction from frequency dithering are carried out through both of the theoretical and experimental analysis. Furthermore, the impact on EMI filter's
performances under frequency dithering condition is also
researched through mathematical derivations. Experiments
prove that with a proper design, it is possible to gain an useful
EMI reduction in the IBPFC system by frequency dithering.
Original languageEnglish
Title of host publication2012 IEEE 7th International Power Electronics and Motion Control Conference
PublisherIEEE
Publication date2012
Pages1065-1069
ISBN (Print)978-1-4577-2087-1
DOIs
Publication statusPublished - 2012
EventThe International Power Electronics and Motion Control Conference - Harbin, China
Duration: 2 Jun 20125 Jun 2012

Conference

ConferenceThe International Power Electronics and Motion Control Conference
CountryChina
CityHarbin
Period02/06/201205/06/2012

Keywords

  • EMI reduction
  • Interleaved Bridgeless PFC
  • Frequency dithering
  • Filter
  • Switching frequency.
  • Power harmonic filters
  • Harmonic analysis
  • Frequency measurement

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