Frequency dependence of hysteresis curves in conducting magnetic materials

Thumbnail Image
Date
1994-11-15
Authors
Jiles, David
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Authors
Person
Jiles, David
Distinguished Professor Emeritus
Research Projects
Organizational Units
Organizational Unit
Journal Issue
Is Version Of
Versions
Series
Department
Ames National Laboratory
Abstract

An extension of the hysteresis model has been developed that takes into account the effects on the hysteresis curves of eddycurrents in electrically conducting media. In the derivation presented it is assumed that the frequency of the applied field is low enough (or the thickness of the material medium small enough) that the skin effect can be ignored so that the magnetic field penetrates uniformly throughout the material. In this case, the dc hysteresis equation is extended by the addition of a classical eddy‐current‐loss term depending on (i) the rate of change of magnetization with time, (ii) the resistivity of the material, and (iii) the shape of the specimen; and on an anomalous (or excess) eddy‐current‐loss term which depends on (dB/dt)3/2. In the limit, as the frequency of the magnetic field tends to zero, the frequency‐dependent hysteresis curve approaches the dc curve.

Comments

The following article appeared in Journal of Applied Physics 76 (1994): 5849 and may be found at http://dx.doi.org/10.1063/1.358399.

Description
Keywords
Citation
DOI
Copyright
Sat Jan 01 00:00:00 UTC 1994
Collections