Torque ripple reduction in an interior permanent-magnet synchronous motor for servo applications

Author

Zheng, Ping ; Ke, Wenjing ; Song, Zhiyi ; Zhao, Quanbin ; Bai, Jingang

Author_Institution

Dept. of Electr. Eng., Harbin Inst. of Technol., Harbin, China

fYear

2011

fDate

20-23 Aug. 2011

Firstpage

1

Lastpage

5

Abstract

An interior permanent-magnet synchronous motor (IPMSM) used for high-performance industrial servo applications is investigated. Compared with surface mounted PMSM, the IPMSM features simple fixing of permanent magnets. However, torque ripple reduction is still an important issue. Three rotor structures are comparatively studied by the finite-element method (FEM) in this paper. The optimizations of rotor eccentricity for models of 48-slot/8-pole, 36-slot/8-pole and 18-slot/8-pole are investigated, respectively. Moreover, the influences of the permanent magnet (PM) width, the PM slot span angle and the width of slot notch on torque ripple are also discussed.

Keywords

finite element analysis; optimisation; permanent magnet motors; permanent magnets; rotors; servomotors; synchronous motors; torque; 18-slot-8-pole model; 36-slot-8-pole model; 48-slot-8-pole model; FEM; IPMSM; PM slot span angle; finite element method; high-performance industrial servo application; interior permanent magnet synchronous motor; rotor eccentricity optimization; rotor structure; slot notch; torque ripple reduction; Air gaps; Forging; Harmonic analysis; Permanent magnet motors; Permanent magnets; Rotors; Torque;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems (ICEMS), 2011 International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4577-1044-5

Type

conf

DOI

10.1109/ICEMS.2011.6073359

Filename

6073359