Influence of Permanent Magnets Chamfering on Cogging Torque of Surface-Mounted Permanent Magnet Synchronous Motor

doi:10.11985/2018.01.006

Abstract

Abstract:

Aiming at the problem that the cogging torque of permanent magnet motor influences its control precision and performance, this paper proposed a method that the permanent magnets chamfering can suppress the cogging torque effectively. Take a 30- slot/10-pole permanent magnet motor as an example, the finite element model of the electromagnetic field of the motor is established by using the numerical simulation principle,The method of reducing the cogging torque by chamfering is simulated and analyzed.The results show that the size of the cogging torque is related to the height and the width of the permanent magnet chamfering. Selecting the appropriate cutting angle height and width can effectively reducing the cogging torque. The simulation results show the effectiveness and correctness of the method of cogging torque reduction.

Key words: Surface-mounted permanent magnet synchronous motor, finite element method, cogging torque, chamfering

CLC Number:

TM351

Yu Zhang,Mufan Wang,Chongqi Hou,Chuanqing Wang,Jianxiong Shi,Dong Zhang,Xiaohua Bao. Influence of Permanent Magnets Chamfering on Cogging Torque of Surface-Mounted Permanent Magnet Synchronous Motor[J]. Journal of Electrical Engineering, 2018, 13(1): 38-42.

Figures/Tables 7

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Tab.2

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Fig.5

References 8

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参数	数值
额定功率/kW	1.5
额定电压/V	224
额定频率/Hz	150
极数	10
槽数	30
定子外径/mm	126
转子内径/mm	78
铁心长度/mm	50

	h = 0	h = 0.5h₀	h = 0.75h₀
T_max	11.76	9.98	9.01
T_min	5.98	6.06	5.94
T_avg	8.87	8.02	7.47
T_tr	0.326	0.244	0.205

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