Affiliations: [a] Department of Electromagnetic Theory, Budapest
University of Technology and Economics, Egry József u. 18. Budapest, H-1521
Hungary. Tel.: +36 1 463 2816, +36 1 463 2812; Fax: +36 1 463 3189; E-mail:
{si,pavo, gyimothy}@evtsz1.evt.bme.hu | [b] Institut für Grundlagen und Theorie der
Elektrotechnik, Technical University of Graz, Kopernikusgasse 24, Graz, A-8010
Austria. Tel.: +43 316 873 7263; Fax: +43 316 873 7751; E-mail:
biro@igte.tu-graz.ac.at
Correspondence:
[*]
Corresponding author
Abstract: A method for the approximate prediction of the power loss of a
nonlinear ferromagnetic laminated iron core is presented. The calculation is
made in two subsequent steps. In the first step, the approximate magnetization
of the material is predicted assuming a bulk nonlinear material with
anisotropic electric conductivity. In the second step the nonlinear materials
of the ferromagnetic sheets are replaced with linear ones whose permeability is
spatially inhomogeneous. The actual permeability distributions are determined
based on the nonlinear B-H curve of the material and the
magnetic field values obtained from the first calculation. In this paper the
applicability of the method is demonstrated through calculations made by FEM
studying a benchmark arrangement.
Keywords: eddy current losses, laminated core, inhomogeneous permeability
