Influence of Magnet Shape on the Cogging Torque of a Surface-mounted Permanent Magnet Motor  

作　　者：Min Zhou Xinxing Zhang Wenxiang Zhao Jinghua Ji Jingning Hu 

机构地区：[1]Research Center of Fluid Machinery Engineering and Technology,Jiangsu University,Zhenjiang 212013,China [2]School of Electrical and Information Engineering,Jiangsu University,Zhenjiang 212013,China [3]Jingjiang College,Jiangsu University,Zhenjiang 212013,China

出　　处：《Chinese Journal of Electrical Engineering》2019年第4期40-50,共11页中国电气工程学报（英文）

基　　金：Supported by the Key Research and Development Program of Jiangsu Province(BE2018107).

摘　　要：The influence of bread-loaf shaped magnet poles under parallel magnetization on the cogging torque of surface-mounted permanent magnet(SPM)motors is studied.For the SPM motors having magnetic poles with eccentricity and sine harmonic compensation,the electromagnetic performances of integer and fractional slot motors are compared.It is found that the cogging torque and torque ripple of the integer and fractional slot motors can be reduced with the same eccentric magnet pole.The cogging torque and torque ripple of a fractional slot motor can be decreased by sine harmonic compensation,however,the same sine harmonic compensation has a small influence in integer slot motors.By varying the magnetic poles,the contribution of the field harmonics(k=(2n+1)p),which are a direct result of magnet magnetization,to the cogging torque also changes.The electromagnetic performance of a 3 kW prototype is tested,and it is found that the experimental results validate the theoretical investigation.

关 键 词：Analytical model bread-loaf magnet shape finite-element(FE) cogging torque surface-mounted permanent magnet(SPM)motor 

分 类 号：O17[理学—数学]