Effect of Flux Density Harmonics on Torque Characteristics of Integer Slot and Fractional Slot PMSMs

IF 5.4 2区工程技术 Q2 ENERGY & FUELS IEEE Transactions on Energy Conversion Pub Date : 2025-01-03 DOI:10.1109/TEC.2025.3525504

Jinhua Chen;Jiutong Yang;Wei Liu;Guilin Yang;Chi Zhang

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Abstract

The airgap flux density harmonics have a significant effect on the cogging torque and torque ripple of permanent magnet synchronized machines (PMSMs). According to pole-slot combinations, the distribution of magnetomotive force (MMF) and flux density of integer slot and fractional slot PMSMs is not the same, and the influence on the torque characteristics is not the same. Based on this, this paper analyzes the effect of flux density harmonics on torque harmonics of integer slot and fractional slot PMSMs. Firstly, the characteristics of the distribution of the flux density of the PMSMs as well as the calculation model of the torque are obtained. The contribution of each flux density harmonic to the average torque of both machines is analyzed. In addition, the relationship between different flux density harmonics, cogging torque and torque ripple is analyzed. The mutual canceling effect of the torque harmonics generated by the flux density harmonics of particular orders is proposed, and the law of particular orders and the mechanism of mutual canceling are investigated. The proposed model is applicable to different types of PMSMs and lays the foundation for the subsequent optimization of torque harmonics.

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磁通密度谐波对整槽和分数槽永磁同步电机转矩特性的影响

气隙磁通密度谐波对永磁同步电机的齿槽转矩和转矩脉动有显著影响。根据极槽组合，整槽和分数槽永磁同步电机的磁动势和磁通密度分布不相同，对转矩特性的影响也不相同。在此基础上，分析了磁通密度谐波对整槽和分数槽永磁同步电机转矩谐波的影响。首先，得到了永磁同步电动机磁通密度分布的特点以及转矩的计算模型；分析了各磁通密度谐波对两机平均转矩的贡献。分析了不同磁通密度谐波与齿槽转矩和转矩脉动之间的关系。提出了特定阶次磁通密度谐波产生的转矩谐波的相互抵消效应，并研究了特定阶次谐波的相互抵消规律和相互抵消机理。该模型适用于不同类型的永磁同步电机，为后续的转矩谐波优化奠定了基础。

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来源期刊

IEEE Transactions on Energy Conversion 工程技术-工程：电子与电气

CiteScore

11.10

自引率

10.20%

发文量

230

审稿时长

4.2 months

期刊介绍： The IEEE Transactions on Energy Conversion includes in its venue the research, development, design, application, construction, installation, operation, analysis and control of electric power generating and energy storage equipment (along with conventional, cogeneration, nuclear, distributed or renewable sources, central station and grid connection). The scope also includes electromechanical energy conversion, electric machinery, devices, systems and facilities for the safe, reliable, and economic generation and utilization of electrical energy for general industrial, commercial, public, and domestic consumption of electrical energy.