Coupled magneto-elastic FE model for simulation of electrical machines

Issue title: Special Volume: Proceedings of the eleventh International Symposium on Applied Electromagnetics and Mechanics ISEM-Versailles ISEM 03

Article type: Research Article

Authors: Belahcen, Anouar^a

Affiliations: [a] Helsinki University of Technology, P.O. Box 3000, FIN-02015-HUT, Finland. Tel.: + 358 451 2382; Fax: + 358 451 2991; E-mail: anouar.belahcen@hut.fi

Abstract: This work presents a magneto-elastic FE model for simulation and analysis of electrical machines. The model includes magnetic non-linearity and stress dependent magnetisation. Magnetostriction and effects of geometry changes on magnetic field are accounted for. The circuit equations of the windings are solved simultaneously with the magnetic and displacement fields. Calculations without magnetostriction, show that the radial displacement of the stator core of a synchronous machine is lower than the one calculated with a non-coupled model. The difference in displacement field suggests that the magnetostriction changes due to a difference in stresses. Measured magnetostriction at different stresses is also presented for comparison.

Keywords: magneto-elastic, coupling, magnetostriction, electrical machines

DOI: 10.3233/JAE-2004-549

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 19, no. 1-4, pp. 135-138, 2004