Comparison of a simple and a detailed model of magnetic hysteresis with measurements on electrical steel

Hanif Tavakoli (School of Electrical Engineering, Royal Institute of Technology, Stockholm, Sweden)
Dierk Bormann (ABB AB – Corporate Research, Power Technologies, Västerås, Sweden)
David Ribbenfjärd (School of Electrical Engineering, Royal Institute of Technology, Stockholm, Sweden)
Göran Engdahl (School of Electrical Engineering, Royal Institute of Technology, Stockholm, Sweden)

Abstract

Purpose

For efficient magnetic field calculations in electrical machines, the hysteresis and losses in laminated electrical steel must be modeled in a simple and reliable way. The purpose of this paper is to investigate and discuss the potential of a simple complex‐permeability model.

Design/methodology/approach

A frequency dependent complex‐permeability model as well as a more detailed model (describing hysteresis, classical eddy current effects, and excess losses separately) are compared to single‐sheet measurements on laminated electrical steel. It is discussed under which circumstances the simple complex‐μ model is an adequate substitute for the more detailed model.

Findings

A satisfactory agreement of the simple complex‐μ model was found with both detailed model and measurements, improving with increasing frequencies. This is true not only for the effective permeability function, but holds also for the detailed HB characteristics (hysteresis).

Originality/value

It is demonstrated that the complex‐μ model is a reliable and convenient starting point for the estimation of flux distribution and losses in complicated magnetic core geometries.

Keywords

Citation

Tavakoli, H., Bormann, D., Ribbenfjärd, D. and Engdahl, G. (2009), "Comparison of a simple and a detailed model of magnetic hysteresis with measurements on electrical steel", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 28 No. 3, pp. 700-710. https://doi.org/10.1108/03321640910940954

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Publisher

:

Emerald Group Publishing Limited

Copyright © 2009, Emerald Group Publishing Limited

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