Optimal pole shape design for the reduction of cogging torque of brushless DC motor using evolution strategy

Author

Kyung Chung, Tae ; Ki Kim, Suk ; Hahn, Song-Yop

Author_Institution

Dept. of Electr. Eng., Chungang Univ., Seoul, South Korea

Volume

33

Issue

2

fYear

1997

fDate

3/1/1997 12:00:00 AM

Firstpage

1908

Lastpage

1911

Abstract

This paper describes a design procedure that reduces the cogging torque of brushless DC motors. This paper proposes that a predefined slot shape on the pole surface reduces the cogging torque. Standard finite elements are used for field calculation, Maxwell stress tensor for torque calculation and an evolution strategy for the optimal design process to determine the slot size. Verified experiment shows that the proposed algorithm reduces the level of mechanical vibration and noise substantially

Keywords

acoustic noise; brushless DC motors; design engineering; electromagnetic fields; finite element analysis; genetic algorithms; machine theory; torque; Maxwell stress tensor; brushless DC motor; cogging torque reduction; evolution strategy; field calculation; finite elements; genetic algorithm; optimal pole shape design; pole surface; predefined slot shape; slot size; torque calculation; Brushless DC motors; Finite element methods; Forging; Noise level; Noise reduction; Process design; Shape; Tensile stress; Torque; Vibrations;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.582662

Filename

582662