In-situ magnetization of NdFeB magnets for permanent magnet machines

Author

Chang, Liuchen ; Eastham, Tony R. ; Dawson, Graham E.

Author_Institution

Dept. of Electr. Eng., Queen´´s Univ., Kingston, Ont., Canada

Volume

27

Issue

5

fYear

1991

fDate

9/1/1991 12:00:00 AM

Firstpage

4355

Lastpage

4359

Abstract

In-situ magnetizers are needed to facilitate the assembly of permanent magnet machines and to remagnetize the magnets after weakening due to a fault condition. The air-core magnetizer in association with the silicon steel lamination structure of the rotor has advantages over its iron-core counterpart. This method has been used to magnetize the NdFeB magnets in a 30-hp permanent magnet synchronous motor. The magnetizing capability for different magnetizer geometries was investigated for the magnetization of NdFeB material. The design, testing, and operation of this magnetizer are reported.

Keywords

boron alloys; ferromagnetic properties of substances; iron alloys; magnetisation; neodymium alloys; permanent magnet motors; synchronous motors; 30 hp; NdFeB magnets; air-core magnetizer; design; in-situ magnetisation; magnetizing capability; operation; permanent magnet machines; permanent magnet synchronous motor; rotor; silicon steel lamination structure; testing; Assembly; Geometry; Lamination; Magnetic materials; Magnetization; Permanent magnet machines; Permanent magnet motors; Rotors; Silicon; Steel;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.105061

Filename

105061