Relation between the microstructural properties of electrical steels and the Preisach modelling

In this paper, the relation of the microstructural properties of electrical steels and the material parameters in the dynamic Preisach model is establ ished. Particular experimental work was performed in order to separate the influence of grain size from the crystallographic texture. First, the param eters defined in the dynamic Preisach model has been fitted using the hyste resis loss characteristics. Next, we identified and separated the effect of average grain size from the crystallographic texture on each material para meter defined in the Lorentzian-Preisach distribution function. Here, the s ame texture dependence was identified for all kinds of magnetisation proces ses, i.e. for the irreversible and reversible parts of the quasi-static mag netisation and for the AC excess loss behaviour. Finally, the Preisach dist ribution function is rewritten explicitly including the grain size and crys tallographic texture dependence. (C) 1999 Elsevier Science B.V. All rights reserved.