Finite element analysis of the magnetic field in rare-earth permanent magnet systems, with consideration of temperature dependence

Author

Chen, S. ; Binns, K.J. ; Liu, Z. ; Shimmin, D.W.

Author_Institution

Dept. of Electr. Eng. & Electron., Liverpool Univ., UK

Volume

28

Issue

2

fYear

1992

fDate

3/1/1992 12:00:00 AM

Firstpage

1303

Lastpage

1306

Abstract

A finite element method for the solution of the electromagnetic field taking account of the temperature properties of rare-earth magnets is presented. The nonuniform distribution of magnetization caused by the temperature-dependent properties of rare-earth permanent magnets is considered, and both reversible and irreversible changes in the magnetic strength of magnets with temperature are investigated. An analysis of the thermoelectromagnetic coupled problem derived from an apparatus designed for the investigation of the temperature effects on the properties of a rare-earth magnet is performed. Good agreement between numerical and experimental results is obtained

Keywords

demagnetisation; electromagnetic fields; ferromagnetic properties of substances; finite element analysis; magnetisation; permanent magnets; rare earth alloys; temperature distribution; demagnetisation curves; electromagnetic field; finite element method; irreversible changes; magnetic strength; nonuniform distribution of magnetization; rare-earth permanent magnet systems; reversible changes; temperature dependence; thermoelectromagnetic coupled problem; Couplings; Electromagnetic fields; Finite element methods; Magnetic analysis; Magnetic fields; Magnetic properties; Magnetization; Performance analysis; Permanent magnets; Temperature distribution;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.123929

Filename

123929