Influence of magnet shape on torque behavior in surface-mounted permanent magnet motors

Author

Huangda Lin ; Dong Wang ; Dezhi Liu ; Junquan Chen

Author_Institution

Inst. of Power Electron. Technol., Naval Univ. of Eng., Wuhan, China

fYear

2014

fDate

22-25 Oct. 2014

Firstpage

44

Lastpage

47

Abstract

This paper discusses influence of magnet shape on torque behavior in surface-mounted permanent magnet (SPM) motors. The effect of pole embrace optimization, magnet-skew and magnet shaping have been analyzed in different 8-pole, 24-slot, three phase SPM motors which having the same stator configuration. Finite-element method (FEM) is used to predict Back-EMF and torque ripple. The result shows magnet-skew can reduce cogging torque efficiently. Magnet sharping with 3rd harmonic increases average torque compared with sine magnet shaping and lower torque ripple compared with magnet-skew with optimized pole embrace.

Keywords

electric potential; finite element analysis; harmonic analysis; permanent magnet motors; stators; surface mount technology; torque; 3rd harmonic; FEM; SPM motors; back-EMF prediction; cogging torque reduction; finite-element method; magnet-skew; pole SPM motors; pole embrace optimization; sine magnet shaping; slot SPM motors; stator configuration; surface-mounted permanent magnet motors; three phase SPM motors; torque ripple behavior prediction; Forging; Harmonic analysis; Magnetic flux; Magnetoacoustic effects; Rotors; Shape; Torque;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems (ICEMS), 2014 17th International Conference on

Conference_Location

Hangzhou

Type

conf

DOI

10.1109/ICEMS.2014.7013448

Filename

7013448