Analysis and design guide of active EMI filter in a compact package for reduction of common-mode conducted emissions

Dongil Shin, Sungnam Kim, Geunseok Jeong, Jaesu Park, Joungwook Park, Ki Jin Han, Jingook Kim

Research output: Contribution to journalArticlepeer-review

80 Scopus citations

Abstract

A common-mode (CM) active filter was designed in a compact package to suppress CM conducted emissions at a switching mode power supply (SMPS). Based on the analytical expressions considering both stability and performance, the design and optimization rules for the proposed active filter have been presented. After verifying its performance by measurements using vector network analysis, the proposed filter was installed in a 200-W SMPS board with 64 and 110 kHz switching frequencies, demonstrating its usefulness by experiments. The performance degradation due to the magnetic saturation and the AEF grounding impedance was also analyzed and investigated.

Original languageEnglish
Article number7047781
Pages (from-to)660-671
Number of pages12
JournalIEEE Transactions on Electromagnetic Compatibility
Volume57
Issue number4
DOIs
StatePublished - 1 Aug 2015

Keywords

  • Active EMI filter (AEF)
  • active filter
  • common mode (CM)
  • conducted emission (CE)
  • electromagnetic interference (EMI)
  • feed forward
  • switching mode power supply (SMPS)

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