Electromagnetic design optimization of a powder aligning fixture for a compression-molded anisotropic NdFeB ring magnet

Author

Kinsey, David J. ; Jewell, Geraint W. ; Howe, David ; Williams, Andrew J. ; Lillywhite, Sarah J. ; Harris, I. Rex

Author_Institution

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

Volume

40

Issue

3

fYear

2004

fDate

5/1/2004 12:00:00 AM

Firstpage

1702

Lastpage

1707

Abstract

The paper describes the design optimization of an electromagnet for aligning anisotropic NdFeB powder during the compression molding of a two-pole ring magnet. The optimization method makes extensive use of both two- and three-dimensional magnetostatic finite-element analysis in order to demonstrate the influence of various design features on the performance of the electromagnet and the limitations of two-dimensional analysis. Measurements on a prototype powder-aligning system validate the optimization method.

Keywords

boron alloys; compression moulding; electromagnets; finite element analysis; fixtures; iron alloys; magnetic anisotropy; neodymium alloys; optimisation; permanent magnets; NdFeB; anisotropic powder; anisotropic ring magnet; compression molding; compression-molded ring magnet; electromagnet performance; electromagnetic design optimization; magnetostatic finite-element analysis; neodymium alloys; permanent magnets; powder aligning fixture; powder-aligning system; powdered magnetic materials; two-dimensional analysis; two-pole ring magnet; Anisotropic magnetoresistance; Design optimization; Electromagnetic analysis; Electromagnets; Fixtures; Magnetic anisotropy; Magnetostatics; Optimization methods; Perpendicular magnetic anisotropy; Powders; Finite-element methods; neodymium alloys; permanent magnets; powdered magnetic materials;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2004.826625

Filename

1298948