基于辅助槽和极弧系数的永磁电机齿槽 转矩削弱分析

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DOI：10.16652/j.issn.1004-373x.2026.10.025

引用格式：，，，等.基于辅助槽和极弧系数的永磁电机齿槽转矩削弱分析[J].现代电子技术，2026，49（10）：172-178.

中图分类号：TN03-34

文献标识码：A

文章编号：1004-373X（2026）10-0172-07

Analysis of permanent magnet motor cogging torque reduction based on auxiliary slots and pole-arc coefficient

Huo Ping， Li Wenchen， Huang Baowang， Wang Zhijun

（College of Mechanical Engineering， North China University of Technology， Tangshan 063000， China）

Abstract： Cogging torque can affect the speed and torque ripple of interior permanent magnet synchronous motor （IPMSM）， causing vibration and noise， thereby reducing the overall performance of the motor. By analyzing the cogging torque expression， the primary parameters affecting cogging torque are identified as the air-gap permeance harmonics and air-gap flux density harmonics. By employing stator auxiliary slots and optimizing the pole-arc coefficient， two parameters can be modified to reduce the cogging torque. Taking an 8-pole 30-slot IPMSM as an example， the effects of the number， position and size of auxiliary slots on cogging torque and the pole-arc coefficient on cogging torque are analyzed， and the optimal pole-arc coefficient that can effectively reduce the cogging torque is calculated. In order to ensure the motor's output performance， an evolutionary algorithm （EA） is utilized to optimize the rotor structure. The results demonstrate that， without compromising motor performance， the no-load phase back electromotive force （EMF） is increased by 5.1%， cogging torque is reduced by 91.4%， and torque ripple is decreased by 45.6%， thereby significantly enhancing the motor's output performance.

Keywords： auxiliary slot; pole - arc coefficient; cogging torque; interior permanent magnet synchronous motor; multi-objective optimization; motor design; electromagnetic performance analysis

0 引言

内置式永磁同步电机具有高效率、高功率因数和高可靠性等优点，已经被广泛应用于航空航天、纯电动汽车、风力发电等领域 [1-2] 。（剩余9765字）