Modeling Core Losses Under Exciting Waveforms With Zero Voltage Period in Power Converters

Zhou Yan, Wenxuan Xie, Chongyuan Ma, Liang Huang

Research output: Journal PublicationArticlepeer-review

Abstract

When the exciting waveform contains the interval of zero voltage, additional core losses have been observed, but lack of a clear physical explains. These additional losses may come from two aspects. The first one is the released energy caused by the interfacial dielectric loss between the isolation layers and grains. A function with two extracted relaxation coefficients is used to model the interfacial dielectric loss. The less important one is the released energy from the parasitic inductance of core materials. Based on the microscale material structure, an equivalent eddy current loss circuit model is proposed in this article, to include these two aspects. Based on the proposed model, core losses in N87 and 3C90 materials have been predicted successfully. The experimental results are in agreement with both theoretical analyses and simulation results.

Original languageEnglish
Pages (from-to)1378-1386
Number of pages9
JournalIEEE Transactions on Industrial Electronics
Volume70
Issue number2
DOIs
Publication statusAccepted/In press - 2022

Keywords

  • Bridge circuits
  • Core loss
  • Core losses
  • Dielectric losses
  • Eddy currents
  • Ferrites
  • Mathematical models
  • Voltage
  • ferrite materials
  • full-bridge converters

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