Eddy current loss calculations for skew, bracket and wedge domain walls as in (110) (001) SiFe laminations

Abstract

Calculations are presented of the eddy current losses associated with magnetization of ferromagnetic laminations by the motion of skew domain walls. Skew domain walls, i.e. inclined to the sheet normal, are characteristic of Goss oriented silicon iron sheet. The results of similar calculations are also presented for domain walls kinked into a form resembling a Dirac bracket (, and wedge shaped domains. The cyclic magnetization loss is calculated for a model in which magnetization reversal is initiated by the growth of wedge domain structures which transform to skew wall pairs on crossing the sheet. The losses calculated for all models are somewhat less than those given by the well known Pry and Bean (1958) model.