电励磁集中式定子绕组同步电机的性能对比分析

doi:10.16180/j.cnki.issn1007-7820.2021.12.004

Abstract

Abstract:

To reduce the torque ripple, this study investigates the effect of different slot/pole ratios and air gaps on the torque ripple of the motor. Under the same size, same speed, and the same excitation, the performance analysis of the electric excitation concentrated winding motor with 12/10, 18/10, 30/10 is carried out. First, the finite element analysis of the motors with different slot/pole ratios is performed and the influence of the uniformity of the air gap of the motors on the cogging torque is comparatively analyzed. Through comparison, it is found that an appropriate slot/pole ratio can reduce cogging torque and the harmonic content of back EMF, and from the perspective of cogging torque, fractional slot motors are lower than integer slot motors. The use of non-uniform air gap can reduce the content of air gap magnetic density harmonics, therefore further reducing cogging torque and torque ripple. After finite element calculation, the inductance of these three kinds of motors and their influence on torque are analyzed. Finally, it is found that the non-uniform air gap has a more obvious effect on reducing the torque ripple of the motor. The torque ripple percentage of the 12/10 motor has been reduced from 10.6% to 4.2%.

Key words: concentrated winding, slot/pole ratio, finite element analysis, torque fluctuation, cogging torque, non-uniform air gap, back EMF, harmonic content

CLC Number:

TN273

PENG Xinglai,LI Zheng. Comparative Analysis of Performance of Electric Excitation Concentrated Winding Motor[J].Electronic Science and Technology, 2021, 34(12): 19-24.

Figures/Tables 15

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References 18

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参数	数值
定子外径/mm	120.0
定子内径/mm	85.0
转子外径/mm	84.0
转子内径/mm	18.7
气隙厚度/mm	0.5
电机长度/mm	76.0
定子每槽匝数(12槽)	230
定子每槽匝数(18槽)	154
定子每槽匝数(30槽)	94

槽/极	T_ripple(均匀气隙)	T_ripple(非均匀气隙)
12/10	10.6%	4.2%
18/10	13.7%	6.3%
30/10	33.4%	12.0%

Comparative Analysis of Performance of Electric Excitation Concentrated Winding Motor

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