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Magnetic near field predication and suppression of a Flyback SMPS

  • Xiao Guang Zhang*
  • , Jun Ping He
  • , Li Sun
  • , Yi Wang
  • *Corresponding author for this work
  • School of Electrical Engineering and Automation, Harbin Institute of Technology
  • Harbin Institute of Technology Shenzhen

Research output: Contribution to journalArticlepeer-review

Abstract

In order to study the distribution and characteristics of magnetic radiation around a Flyback power supply, an easy induced voltage calculation method of near field magnetic radiation is proposed. After building up a high frequency circuit simulation model, resonant phenomenon among parasitic inductors and capacitors in main circuit and its impaction on magnetic radiation were analyzed and verified by experiment. The simple induced voltage calculation method of near field magnetic radiation was deduced. Several magnetic radiation control methods, such as metal ground mirror plane, shielding method, were proposed. The validity and correctness of the novel are verified by simulation and experiment results.

Original languageEnglish
Pages (from-to)21-25+31
JournalDianji yu Kongzhi Xuebao/Electric Machines and Control
Volume14
Issue number10
StatePublished - Oct 2010
Externally publishedYes

Keywords

  • Magnetic field analysis
  • Radiation prediction
  • Radiation suppression
  • Switch mode power supply

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