A new approach to analysis and mitigation of PM motor cogging torque

Author

Tavakkoli, M.A. ; Madani, S.M.

Author_Institution

Dept. of Electr. Eng., Isfahan Univ. of Technol., Isfahan

fYear

2008

fDate

10-13 Nov. 2008

Firstpage

2003

Lastpage

2008

Abstract

Torque pulsation reduction of permanent magnet synchronous motor (PMSM) is an important design issue. One component of this pulsation is cogging torque, which depends on magnetic configuration of stator and rotor (e.g., magnets and slots shape and dimensions). This paper presents a new physical and mathematical analysis of cogging torque for surface mount PM (SFPM) motor. Based on the analysis, a mathematical formula is derived for the cogging torque and verified by FEM simulation. Based on the presented analysis, a new method of air-bridge shaping to reduce cogging torque is presented for an interior PM motor (IPM). The FEM result shows significant reduction of the cogging torque, due to new air bridge design.

Keywords

finite element analysis; mathematical analysis; permanent magnet motors; surface mount technology; synchronous motors; torque; FEM; PMSM; bridge design; cogging torque; interior PM motor; magnetic configuration; mathematical analysis; permanent magnet synchronous motor; rotors; stators; surface mount PM motor; torque pulsation reduction; Analytical models; Forging; Magnetic analysis; Mathematical analysis; Permanent magnet motors; Rotors; Shape; Stators; Synchronous motors; Torque;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics, 2008. IECON 2008. 34th Annual Conference of IEEE

Conference_Location

Orlando, FL

ISSN

1553-572X

Print_ISBN

978-1-4244-1767-4

Electronic_ISBN

1553-572X

Type

conf

DOI

10.1109/IECON.2008.4758264

Filename

4758264