Influence of magnet shape on the cogging torque of a surface-mounted permanent magnet motor

被引：32
作者：
Zhou M. [1 ,2 ]
Zhang X. [3 ]
Zhao W. [2 ]
Ji J. [2 ]
Hu J. [1 ]
机构：
[1] Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang
[2] School of Electrical and Information Engineering, Jiangsu University, Zhenjiang
[3] Jingjiang College, Jiangsu University, Zhenjiang
来源：
Chinese Journal of Electrical Engineering | 2019年 / 5卷 / 04期
关键词：
Analytical model; Bread-loaf magnet shape; Cogging torque; Finite-element (FE); Surface-mounted permanent magnet (SPM) motor;
D O I：
10.23919/CJEE.2019.000026
中图分类号：
学科分类号：
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. © 2021 Chinese Journal of Electrical Engineering. All rights reserved.
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页码：40 / 50
页数：10
相关论文
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