FEM Computation of Magnetic Field and Iron Loss in Laminated Iron Core Using Homogenization Method

Author

Kaimori, Hiroyuki ; Kameari, Akihisa ; Fujiwara, Koji

Author_Institution

Sci. Solutions Int. Lab., Inc, Tokyo

Volume

43

Issue

4

fYear

2007

fDate

4/1/2007 12:00:00 AM

Firstpage

1405

Lastpage

1408

Abstract

This paper presents a novel method for analyzing transient magnetic fields in laminated iron cores. It is based on the finite-element method and a newly developed homogenization method is applied to model the lamination effectively. The homogenized constitutive relations, of which the approximation is only applicable to low-frequency problems, are derived analytically, neglecting eddy currents induced by time-varying magnetic fluxes parallel to the lamination. The loss due to the neglected eddy currents is estimated in the postprocessing state utilizing the obtained magnetic field variation. The calculated magnetic field is in good agreement with the measurement for a benchmark problem. It is demonstrated that the homogenized relations can be applied to the low-frequency problems

Keywords

eddy current losses; finite element analysis; laminates; magnetic cores; magnetic fields; magnetic flux; transient analysis; FEM computation; eddy currents; finite element method; homogenization method; homogenized constitutive relations; iron loss; laminated iron core; magnetic field calculation; post processing; time-varying magnetic flux; transient magnetic field analysis; Eddy currents; Finite element methods; Iron; Lamination; Magnetic analysis; Magnetic cores; Magnetic field measurement; Magnetic fields; State estimation; Transient analysis; Anisotropic nonlinear magnetic field analysis; homogenization method; iron loss; laminated iron core;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2007.892429

Filename

4137753