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An experimental study of common- and differential-mode active EMI filter compensation characteristics

  • North China University of Technology
  • Xi'an Jiaotong University

Research output: Contribution to journalArticlepeer-review

88 Scopus citations

Abstract

Most reported compensation schemes for active electromagnetic interference filters (AEFs) use either voltage canceling or current canceling to deal with high-frequency noise interference. The purpose of this paper is to investigate the compensation characteristics of these two kinds of AEFs for different types of noise sources, i.e., common mode (CM) and differential mode (DM) noise source. This is examined by experimental identification and theoretical analysis of the insertion losses of AEF with voltage- or current-cancellation scheme. It is demonstrated that current-canceling AEFs are effective in eliminating high-impedance CM noise, while voltage-canceling AEFs are good compensation solutions for low-impedance DM noise. The results reported in the paper enable the choice of optimized compensation schemes, using the aforementioned indicated aspects.

Original languageEnglish
Pages (from-to)683-691
Number of pages9
JournalIEEE Transactions on Electromagnetic Compatibility
Volume51
Issue number3 PART 2
DOIs
StatePublished - 2009

Keywords

  • Active filter
  • Common mode (CM)
  • Differential mode (DM)
  • Electromagnetic interference (EMI)
  • Insertion loss
  • Noise impedance

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