Cogging torque reduction of a single-phase brushless DC motor

Author

Huang, Der-Ray ; Ying, Tai-Fa ; Wang, Shyh-Jier ; Zhou, Chi-mou ; Lin, Yin-Kwang ; Su, Kai-Wen ; Hsu, Chung-I G.

Author_Institution

Optoelectron. & Syst. Lab., ITRI, Hsinchu, Taiwan

Volume

34

Issue

4

fYear

1998

fDate

7/1/1998 12:00:00 AM

Firstpage

2075

Lastpage

2077

Abstract

In this research, the cogging torque of a newly designed single-phase brushless DC motor used in CD-ROM application is investigated. A finite element method is employed to numerically analyze the magnetic field distribution inside the motor, in which a three-dimensional mesh is constructed. The torque due to the magnetic coupling between the rotor and stator is estimated based upon the virtual work concept. It is proposed in this paper that the salient pole be divided into several regions in the azimuthal direction. By properly choosing the radii for these regions, the cogging torque can be greatly reduced

Keywords

brushless DC motors; finite element analysis; machine theory; torque; CD-ROM; cogging torque; finite element method; magnetic coupling; magnetic field distribution; numerical simulation; rotor; salient pole; single-phase brushless DC motor; stator; three-dimensional mesh; virtual work; Brushless DC motors; CD-ROMs; Couplings; DC motors; Finite element methods; Forging; Magnetic analysis; Magnetic fields; Rotors; Torque;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.706802

Filename

706802