Optimal design of Permanent Magnet Linear Motor for reducing cogging force

Author

Wenmei Huang ; Chunyuan Shi ; Yinlong Xue ; Guiying Song ; Yuesheng Ling

Author_Institution

Key Lab. of Electro-Magn. Field & Electr. Apparatus Reliability of Hebei province, Hebei Univ. of Technol., Tianjin, China

fYear

2014

fDate

Aug. 31 2014-Sept. 3 2014

Firstpage

1

Lastpage

4

Abstract

Reducing the thrust ripple is one of the important analysis and research contents of Permanent Magnet Linear Motor (PMLM). The thrust ripple was mainly caused by the cogging force and the end force. In this paper, in order to reduce cogging force in PMLM, the mechanism of cogging force was analyzed. And the analytical expression of the cogging force was got using energy method and Fourier expansion. Based on the expression, the effect of slot-poles number, pole-arc coefficient and slot-opening coefficient on cogging force is studied by using Ansoft. The optimized motor parameters of reducing cogging force have been listed. The results show that the optimized motor parameters make the cogging force improved. And the effect is very significant.

Keywords

finite element analysis; linear motors; permanent magnet motors; Ansoft; Fourier expansion; PMLM; cogging force reduction; energy method; permanent magnet linear motor; pole-arc coefficient; slot-opening coefficient; slot-poles number effect; thrust ripple reduction; Force; Forging; Iron; Magnetic cores; Magnetic flux; Permanent magnet motors; Permanent magnets; Permanent magnet linear motor; cogging force; pole-arc coefficient; slot-opening coefficient; slot-poles matching;

fLanguage

English

Publisher

ieee

Conference_Titel

Transportation Electrification Asia-Pacific (ITEC Asia-Pacific), 2014 IEEE Conference and Expo

Conference_Location

Beijing

Print_ISBN

978-1-4799-4240-4

Type

conf

DOI

10.1109/ITEC-AP.2014.6941264

Filename

6941264