Measurement and modeling of thermal effects on magnetic hysteresis of soft ferrites

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Hai Yan Lu
  • Jian Guo Zhu
  • S.Y. Ron Hui

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number4352037
Pages (from-to)3952-3960
Journal / PublicationIEEE Transactions on Magnetics
Volume43
Issue number11
Publication statusPublished - Nov 2007

Abstract

We present experimental measurement of thermal effects on magnetic hysteresis of soft ferrite cores commonly used in high-frequency inductors and transformers and propose a method to model the thermal effects. We measured the major hysteresis loops of soft ferrite core samples from various vendors at different temperatures, and found that the saturation points of the limiting hysteresis loops vary with the temperature substantially in a nonlinear manner, but within the normal operating temperature range, typically 20degC-100degC, this variation can be approximately regarded as linear with an acceptable error. We propose a simple method based on this approximation for determining the limiting hysteresis loop of a soft ferrite for a given temperature. This method is validated by the substantial agreement between the experimental measurement and simulation by the scalar Preisach hysteresis model of major hysteresis loops of the test samples at different temperatures. Since most manufacturers provide the limiting loops of their soft ferrite cores at two typical temperatures, the proposed method is very convenient for engineering applications. © 2007 IEEE.

Research Area(s)

  • Magnetic hysteresis measurement, Magnetic hysteresis modeling, Soft ferrites, Thermal effects

Citation Format(s)

Measurement and modeling of thermal effects on magnetic hysteresis of soft ferrites. / Lu, Hai Yan; Zhu, Jian Guo; Hui, S.Y. Ron.

In: IEEE Transactions on Magnetics, Vol. 43, No. 11, 4352037, 11.2007, p. 3952-3960.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review