Cogging Torque Reduction Techniques for Spoke-type IPMSM

International Research and Innovation Summit 2017

Bahrim, F.S.^1 ; Sulaiman, E.^1 ; Kumar, R.^1 ; Jusoh, L.I.^1

Research Center for Applied Electromagnetics, Universiti Tun Hussein Onn Malaysia (UTHM), Parit Raja, Johor, Batu Pahat

86400, Malaysia^1

关键词: 3D-finite element analysis;    Axial pole pairings;    Cogging torque;    Cogging torque reductions;    High power density;    Interior permanent magnet synchronous motor;    Magnetic air gaps;    Undesirable effects;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/226/1/012128/pdf
DOI  :  10.1088/1757-899X/226/1/012128

来源: IOP

【 摘 要 】

A spoke-type interior permanent magnet synchronous motor (IPMSM) is extending its tentacles in industrial arena due to good flux-weakening capability and high power density. In many of the application, high strength of permanent magnet causes the undesirable effects of high cogging torque that can aggravate performance of the motor. High cogging torque is significantly produced by IPMSM due to the similar length and the effectiveness of the magnetic air-gap. The address of this study is to analyze and compare the cogging torque effect and performance of four common techniques for cogging torque reduction such as skewing, notching, pole pairing and rotor pole pairing. With the aid of 3-D finite element analysis (FEA) by JMAG software, a 6S-4P Spoke-type IPMSM with various rotor-PM configurations has been designed. As a result, the cogging torque effect reduced up to 69.5% for skewing technique, followed by 31.96%, 29.6%, and 17.53% by pole pairing, axial pole pairing and notching techniques respectively.