Analysis of magnetization of magnet in the rotor of line start permanent magnet motor

Author

Lee, C.K. ; Kwon, B.I. ; Kim, B.-T. ; Woo, K.I. ; Han, M.G.

Author_Institution

Dept. of Electr. Eng., Hanyang Univ., Ansan, South Korea

Volume

39

Issue

3

fYear

2003

fDate

5/1/2003 12:00:00 AM

Firstpage

1499

Lastpage

1502

Abstract

Line start permanent magnet motor (LSPM) is an effective model of a high-efficiency motor at a constant velocity. Post-assembly magnetization is necessary to reduce manufacture costs. The purpose of this paper is to design the magnetizing fixture and analyze the magnetization characteristics. First, the magnetizing fixture reducing the eddy current is designed. Second, the magnetization of NdFeB magnetized by the designed fixture is analyzed. The time-stepping finite-element method combined with the Preisach model is used to analyze the magnetizing magnetic field intensity and to calculate the magnetization vector. With the magnetization vector, the surface flux density and back-electromagnetic force of the LSPM are calculated and compared with experiment results, which, in turn, agree well with the analysis results.

Keywords

DC motors; eddy currents; finite element analysis; machine theory; magnetic flux; magnetic hysteresis; magnetisation; permanent magnet motors; permanent magnets; rotors; starting; NdFeB; Preisach model; back-electromagnetic force; constant velocity; eddy current reduction; high-efficiency motor model; line start PM motor; magnetization characteristics; magnetization vector; magnetizing fixture; magnetizing magnetic field intensity; post-assembly magnetization; surface flux density; time-stepping FEM; time-stepping finite-element method; Costs; Eddy currents; Finite element methods; Fixtures; Magnetic analysis; Magnetic flux; Magnetization; Manufacturing; Permanent magnet motors; Rotors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2003.810184

Filename

1198509