Magnet shaping for minimal magnet volume in machines

Author

Dubois, Maxime R. ; Polinder, Henk ; Ferreira, Jan A.

Author_Institution

Delft Univ. of Technol., Netherlands

Volume

38

Issue

5

fYear

2002

fDate

9/1/2002 12:00:00 AM

Firstpage

2985

Lastpage

2987

Abstract

An expression for the no-load flux linkage in permanent-magnet (PM) machines is derived. From this expression, a method, is proposed to increase the no-load flux linkage generated in a stator winding per volume of PM material. The method is suitable for machines with short pole pitch and is applied to a transverse-flux machine with single-sided surface-mounted PM. The result is an increase of 37% of the no-load flux linkage per volume of PM, compared with the case of rectangular PM covering 100% of the pole pitch. An increase of 15% is also obtained, if compared with the common practice of using PM covering 80% of the pole pitch.

Keywords

brushless DC motors; machine theory; magnetic flux; permanent magnet machines; stators; Nd-Fe-B; Nd-Fe-B magnets; brushless dc PM machines; magnet shaping; minimal magnet volume; no-load flux linkage; permanent-magnet machines; short pole pitch; single-sided surface-mounted PM; stator winding; transverse-flux machine; Building materials; Coils; Conductors; Couplings; Geometry; Integral equations; Magnetic flux; Magnetic materials; Stator windings; Steel;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.803197

Filename

1042432