耿凯, 胡文静, 刘林,等.新型非对称交错磁极永磁同步电机转矩脉动分析与抑制方法[J].河南理工大学学报（自然科学版）,2026,45(1):143-152.

GENG K, HU W J, LIU L, et al.Torque ripple analysis and suppression method of novel asymmetric interleaved magnetic pole permanent magnet synchronous motor[J].Journal of Henan Polytechnic University(Natural Science) ,2026,45(1):143-152.

新型非对称交错磁极永磁同步电机转矩脉动分析与抑制方法

耿凯1, 胡文静1, 刘林2, 吴进科3, 韩玉桐4, 化思展1, 王伟1

1.山东理工大学 交通与车辆工程学院，山东 淄博  255000；2.潍坊万隆电气股份有限公司，山东 潍坊 261000；3.山东本途新能源车业有限公司，山东 泰安  271000；4.山东哈普沃动力科技股份有限公司，山东 淄博  255000

摘要: 目的 针对传统对称磁极永磁同步电机气隙磁密波形畸变率大、转矩脉动高等问题，提出一种新型非对称交错磁极永磁同步电机结构。 方法 建立考虑非均匀气隙和漏磁通的电机等效磁路模型，结合绕组函数理论，推导气隙磁密和转矩脉动系数解析表达式，分析转子磁极参数对磁密谐波幅值及转矩脉动的影响规律。利用有限元法，以提高电机气隙磁密幅值、输出转矩和抑制齿槽转矩为优化目标，对转子偏心距、磁极偏转角度和移动距离等关键参数进行优化，获得最优匹配参数。试制样机进行实验验证，并将优化前后的电磁特性与输出性能进行对比。 结果 结果表明，优化后，当转子偏心距为10.5 mm，转子磁极偏转角度为4.5°，移动距离为0.1 mm时，气隙磁密波形畸变率减小53.3%，齿槽转矩和转矩脉动分别降低24.4%，56.3%，平均输出转矩提升1.6%。齿槽转矩与输出转矩的样机实验结果与仿真结果相对误差分别仅为6.06%，2.30%，验证了有限元分析方法的有效性。 结论 提出的新型非对称交错磁极永磁同步电机结构与磁极参数优化方法可有效减少气隙磁密谐波含量，抑制转矩脉动，提升电机运行性能，为永磁同步电机转矩脉动分析与优化提供理论参考。

关键词:永磁同步电机;交错磁极;磁极偏移;非均匀气隙;转矩脉动

doi:10.16186/j.cnki.1673-9787.2023040052

基金项目:国家自然科学基金资助项目（52275261）；山东省自然科学基金资助项目（ZR2022QE116）

收稿日期:2023/04/24

修回日期:2023/12/09

出版日期:2025-12-03

Torque ripple analysis and suppression method of novel asymmetric interleaved magnetic pole permanent magnet synchronous motor

Geng Kai1, Hu Wenjing1, Liu Lin2, Wu Jinke3, Han Yutong4, Hua Sizhan1, Wang Wei1

1.School of Transportation and Vehicle Engineering， Shandong University of Technology， Zibo  255000， Shandong， China；2.Weifang Wanlong Electric Co.， Ltd.， Weifang  261000， Shandong， China；3.Shandong Bentu New Energy Vehicle Co.， Ltd.， Taian  271000， Shandong， China；4.Shandong Hapuwo Power Technology Co.， Ltd.， Zibo  255000， Shandong， China

Abstract: Objectives Aiming at the problems of large air gap flux density waveform distortion and high torque ripple of traditional symmetrical magnetic pole permanent magnet synchronous motor（PMSM）， a novel rotor of asymmetric interleaved magnetic pole PMSM was proposed. Methods The equivalent magnetic circuit model of the motor considering non-uniform air gap and leakage flux was established. Combined with the winding function theory， the analytical expressions of air gap flux density and torque ripple coefficient were derived. The influence law of rotor magnetic pole parameters on the amplitude of flux density harmonics and suppressing torque ripple was analyzed. By using the finite element method， the air gap flux density amplitude， cogging torque and output torque of the motor were taken as the optimization objectives. The structural parameters of the rotor eccentricity， magnetic pole deflection angle and moving distance were optimized. The optimal matching parameters was obtained. The prototype was experimentally verified， and the electromagnetic characteristics and output performance before and after optimization were compared. Results The results showed that when the rotor eccentricity was 10.5 mm， the deflection angle of the rotor magnetic pole was 4.5 °， and the moving distance was 0.1 mm， the air gap flux density waveform distortion rate was reduced by 53.3%. The cogging torque and torque ripple were reduced by 24.4% and 56.3%， respectively. The average output torque was increased by 1.6%. The relative error between the experimental value and the simulation value of the cogging torque and the output torque of the prototype were 6.06% and 2.30% respectively. The difference between the results was small， which verified the effectiveness of the finite element analysis method. Conclusions the new structure and magnetic pole parameter optimization method proposed in this paper could effectively reduce the harmonic content of the air gap magnetic density. The torque ripple was suppressed and the motor operation performance was improved. A theoretical reference for the analysis and optimization of PMSM torque ripple was provided.

Key words:permanent magnet synchronous motor;interleaved magnetic pole;magnetic pole deflection and movement;non-uniform air gap;torque ripple