Laminated core modeling under rotational excitations including eddy currents and hysteresis

This article presents a numerical model for the electromagnetic analysis of hysteretic-laminated cores under rotational excitations. The computational approach is based on the finite element solution of a two-dimensional fiel d magnetic problem in a homogeneous structure, where the skin effect due to macroscopic eddy currents in the lamination depth is included through a ge neralized dynamic constitutive relationship between B and H. The proposed m odel, after validation, is applied to the analysis of a laminated disk, eva luating the effects of the supply frequency and distorsion on power losses and B-H loops. (C) 2001 American Institute of Physics.