Title :
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
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;
Conference_Titel :
Electrical Machines and Systems (ICEMS), 2011 International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4577-1044-5
DOI :
10.1109/ICEMS.2011.6073359
