摘要：Analysis of radial force, vibration, and noise in low-speed, high-torque density spoke-type PMSMs with symmetric and asymmetric as

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Analysis of radial force, vibration, and noise in low-speed, high-torque density spoke-type PMSMs with symmetric and asymmetric assisted poles designs

具有对称和非对称辅助磁极设计的低速、高扭矩密度辐条型永磁同步电机的径向力、振动和噪声分析

Sayyed Haleem Shah; Yun-Chong Wang; Dan Shi; Jian-Xin Shen

S. H. Shah, Y. -C. Wang, D. Shi and J. -X. Shen, "Analysis of radial force, vibration, and noise in low-speed, high-torque density spoke-type PMSMs with symmetric and asymmetric assisted poles designs," in CES Transactions on Electrical Machines and Systems, doi: 10.30941/CESTEMS.2025.00003.

Abstract—This article investigates the radial electromagnetic force, vibration, and noise phenomenon in a low-speed, high-torque density spoke-type permanent magnet synchronous machine (ST-PMSM) designed with assisted poles having symmetric and asymmetric topologies. Firstly, an analytical expression for the machine radial electromagnetic force (REMF) is derived to quickly estimate the REMF characteristics for the ST-PMSM with assisted poles having symmetric and asymmetric topologies. The 2D-Fourier decomposition method is applied to investigate the radial electromagnetic force harmonics (REMFHs). Secondly, Finite element (FE) models are designed for the machine structural analysis. Subsequently, the FE models and modal analysis are explored for different design cases of the analyzed machine. Lastly, vibration and noise behavior are investigated using an FE approach for the machine designs under symmetric and asymmetric assisted poles topologies. The findings indicate an increase in the richness of REMFHs, alongside a decrease in both the fundamental frequency and the lowest non-zero order of REMF, attributed to the presence of asymmetric assisted poles. Consequently, it is investigated that while considering the vibration and noise response in ST-PMSMs designed with asymmetric assisted poles topologies, it is essential to thoroughly account for induced non-zero low-order harmonics and their optimization for better vibration and noise performance.

摘要—本文研究了低速、高转矩密度轮辐式永磁同步电机(ST-PMSM)中的径向电磁力、振动和噪声现象，该电机设计有对称和非对称拓扑的辅助磁极。首先，推导出电机径向电磁力(REMF)的解析表达式，以快速估计具有对称和非对称拓扑辅助极点的圣PMSM的REMF特性。应用2D-傅立叶分解方法研究径向电磁力谐波。其次，设计了用于机器结构分析的有限元模型。随后，针对所分析机器的不同设计情况，探讨了有限元模型和模态分析。最后，使用有限元方法研究了对称和非对称辅助极点拓扑下电机设计的振动和噪声行为。研究结果表明，由于非对称辅助极点的存在，REMFHs的丰富性增加，同时基频和REMF的最低非零阶降低。因此，研究表明，在考虑采用不对称辅助极点拓扑设计的ST-PMSM的振动和噪声响应时，有必要彻底考虑感应非零低阶谐波及其优化，以获得更好的振动和噪声性能。

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Moving towards the reliability-oriented design of hairpin winding for EV traction machines driven by SiC inverter

面向可靠性的SiC逆变器驱动电动汽车牵引机发夹绕组设计

Xiaowei Ju; Yue Zhang; Zhiwei Xue; Yuan Cheng; Shumei Cui

X. Ju, Y. Zhang, Z. Xue, Y. Cheng and S. Cui, "Moving towards the reliability-oriented design of hairpin winding for EV traction machines driven by SiC inverter," in CES Transactions on Electrical Machines and Systems, doi: 10.30941/CESTEMS.2025.00005.

《中国电工技术学会电机与系统学报（英文）》(CES TEMS)是中国电工技术学会和中国科学院电工研究所共同主办、IEEE PELS学会技术支持的英文学术期刊。期刊发表国内外有关高性能电机系统、电机驱动、电力电子、可再生能源系统、电气化交通等研发及应用领域中原创、前沿学术论文。中国工程院院士马伟明担任主编，IEEE的执委Don Tan博士为国际主编。目前已被ESCI、EI、Scopus、 Inspec、Google scholar、IEEE Xplore、中国科学引文数据库(CSCD) 核心版、DOAJ、CSTPCD、知网、万方、维普等数据库收录。

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来源：汽车掌上社评