Post Assembly Magnetization Patterns in Rare-Earth Permanent-Magnet Motors

Author

Dorrell, D.G. ; Hsieh, M.-F. ; Hsu, Y.-C.

Author_Institution

Dept. of Electron. & Electr. Eng., Glasgow Univ.

Volume

43

Issue

6

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

2489

Lastpage

2491

Abstract

This paper illustrates a method for verifying the full magnetization of a rare-earth permanent-magnet motor when it is magnetized using a post-assembly method. The usual method of manufacturing a rare-earth magnet machine is to premagnetize before assembly, however, the assembly can be cumbersome. It is possible to magnetize after assembly. This is a critical procedure. If the magnetizing current is too low, then incomplete magnetization occurs. If it is too high, then the winding will overheat and be damaged. A simple method can be used to ascertain the correct magnetization current and this is put forward here. The method is verified experimentally

Keywords

assembling; magnetisation; magnets; permanent magnet motors; magnetization patterns; magnetizing current; post-assembly method; rare-earth magnet machine; rare-earth permanent magnet motors; Assembly; Ferrites; Finite element methods; Magnetic analysis; Magnetic anisotropy; Magnetic flux; Magnetic materials; Magnetization; Permanent magnet motors; Perpendicular magnetic anisotropy; Magnetization; permanent-magnet motors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2007.893715

Filename

4202702