Torque increase of permanent magnet synchronous motor with low-speed and high-torque

被引：0
|
作者：
Xu Y.-M. [1 ]
Jin L. [2 ]
Ai M.-M. [3 ]
Liu W.-H. [3 ]
机构：
[1] School of Electrical and Information Engineering, Changzhou Institute of Technology, Changzhou
[2] Suzhou Huichuan Technology Joint Power Research Center, Suzhou
[3] School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin
来源：
Dianji yu Kongzhi Xuebao/Electric Machines and Control | 2022年 / 26卷 / 12期
关键词：
cogging torque; electric machine design; output torque; permanent magnet synchronous motor; rotor opening; unequal tooth width;
D O I：
10.15938/j.emc.2022.12.012
中图分类号：
学科分类号：
摘要：
Due to the problem of torque increase of permanent magnet synchronous motor, a 48-slot, 40-pole, 160 kW internal tangential direct drive permanent magnet synchronous motor with low-speed and large-torque is taken as the research object. The torque characteristics of the motor are improved by reducing the cogging torque and increasing the output torque. The unequal tooth width of stator is used to weaken the cogging torque and the rotor yoke hole is used to increase the output torque. Firstly, the unequal tooth widths of stator was obtained according to method of stator tooth slot grouping and deflection proposed in this paper, and Fourier decomposition was performed on the air gap magnetic density and the analytical formula of cogging torque under unequal tooth width was derived. The influence rule of unequal tooth width on cogging torque and the variation rule of weakening effect with deflection angle of stator tooth slot were obtained. The optimal deflection angle which can effectively suppress the cogging torque was given. The results were verified by finite element method. Secondly, the output torque of the motor with holes in the rotor yoke was studied and the influence rule of the hole shape, size and number on output torque was analyzed. The simulation analysis shows that the output torque can be appropriately increased by opening holes in the rotor yoke, and the optimum hole shape,size and number are achieved. © 2022 Editorial Department of Electric Machines and Control. All rights reserved.
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页码：116 / 127
页数：11
相关论文
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