Abstract
Finite element methods for investigating magnetic field and flux density distributions in electrical machines are well established. Several investigators have developed ways of modelling anisotropy and predicting losses. However, the methods of modelling anisotropy do not take proper account of the magnetisation processes which occur in electrical steels. This paper outlines some of the existing methods and discusses their inaccuracies. It considers two methods of attempting to take more accurate account of anisotropy, one based on a domain magnetisation model and the other is an interactive FEM/experimental approach. The final conclusion is that accurate methods of anisotropy modelling must be based on a thorough understanding of magnetisation processes in electrical steels.
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