Reducing Torque Ripple of a Permanent Magnet Motor Used in Industrial Robots Based on Structure of Eccentric and Concave Stator Tooth

doi:10.11985/2018.10.005

Abstract

Abstract:

In order to optimize the permanent magnet synchronous motor(PMSM) used in industrial robots with 36 slots and 8 poles, the structure of eccentric and concave stator tooth is proposed. This structure is based on the thinking of different air gap length, and the finite element analysis software ANSYS Maxwell is used to model and analyze the PMSM with the structure. The total harmonic distortion of the air gap magnetic field, the total harmonic distortion of the back EMF, the torque ripple coefficient under different eccentric distances are studied, and the influence of the structure of eccentric and concave stator tooth for cogging torque is analyzed. The simulation experiment results show that the structure of eccentric and concave stator tooth can effectively improve the air gap flux density waveform, and reduce output torque ripple and amplitude of cogging torque.

Key words: Finite element simulation, eccentric stator tooth, total harmonic distortion, torque ripple, cogging torque

CLC Number:

TM351

Wang Wei,Du Xiaobin,Hu Bi,Hu Tuxiong. Reducing Torque Ripple of a Permanent Magnet Motor Used in Industrial Robots Based on Structure of Eccentric and Concave Stator Tooth[J]. Journal of Electrical Engineering, 2018, 13(10): 22-28.

Figures/Tables 14

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偏心距离 /mm	气隙磁通密度		反电动势		转矩波动系数K(%)
偏心距离 /mm	基波幅值/T	THD(%)	基波幅值/T	THD(%)	转矩波动系数K(%)
0	0.866 4	28.65	263.810 0	17.20	8.81
5	0.866 1	28.67	263.804 5	17.13	8.79
10	0.865 2	28.60	263.743 1	17.12	8.73
15	0.864 9	28.51	263.705 6	17.09	8.70
20	0.864 2	28.47	263.659 4	17.04	8.65
25	0.863 6	28.38	263.611 4	17.01	8.61
30	0.862 7	28.28	263.543 6	16.99	8.55
35	0.861 7	28.19	263.458 0	16.96	8.51
40	0.860 4	27.98	263.350 1	16.94	8.46
45	0.858 7	27.85	263.205 5	16.93	8.43
50	0.856 5	27.60	262.997 8	16.92	8.31
55	0.853 5	27.19	262.691 1	16.90	8.14
60	0.848 6	26.62	262.190 7	16.90	7.86
65	0.838 5	25.60	261.033 0	16.87	7.34
70	0.814 4	24.12	257.703 7	15.07	5.68

电机编号	130SJTR-MZ096C（A4Y3X）
齿槽转矩/N·m	0.34
齿槽转矩波动率(%)	0.42

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