Cogging torque reduction of a single-phase brushless DC motor

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

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

16 Scopus citations


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 reduce.

Original languageEnglish
Pages (from-to)2075-2077
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number4 pt 1
StatePublished - 1 Jul 1998
EventProceedings of the 1998 7th Joint Magnetism and Magnetic Materials - International Magnetics Conference. Part 1 (of 2) - San Francisco, CA, USA
Duration: 6 Jan 19989 Jan 1998

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