Analysis and Suppression of Core and PM Losses in Fractional-Slot Permanent Magnet Vernier Machine and PMSM for in-Wheel Application

IF 4.5 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Industry Applications Pub Date : 2025-03-06 DOI:10.1109/TIA.2025.3548602

Yanlei Yu;Shuangchun Xie;Feng Chai;Yulong Pei;Xi Zhang;Christopher H. T. Lee

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Abstract

In the article, the comparative study of core loss and permanent magnet (PM) loss in fractional-slot permanent magnet vernier machines (PMVMs) and permanent magnet synchronous machines (PMSMs) for in-wheel drive are investigated. Firstly, the definitions of “Family” and “Group” for armature magnomotive force harmonics in fractional-slot PM machines are proposed, and the relationship between PMVM and PMSM is illustrated, where the generalized PMSM concept is proposed. Secondly, the core and and PM losses are calculated and compared by the theoretical and finite-element analysis (FEA) methods. The contribution of each harmonic on the core and PM losses is extracted, where the sub-harmonic and slot-harmonic that not contributed to the torque are mostly responsible for core and PM losses. Thirdly, the influence of stator slot opening, flux barriers, and PWM control on the core loss, PM loss, and torque are all investigated. The losses of PMVM and PMSM under various conditions is calculated and exhibited, and the PM loss is much severer in PMVM. Finally, two prototypes of PMVM and PMSM are manufactured and tested, and the total losses and efficiencies are measured, where the experiments agree well with the FEA and theoretical analysis.

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分槽永磁游标机和轮毂永磁同步电机的磁芯和永磁损耗分析与抑制

本文对分槽式永磁游标电机（pmvm）和轮毂驱动永磁同步电机（pmms）的铁芯损耗和永磁损耗进行比较研究。首先，给出了分数槽永磁电机电枢磁动力谐波的“族”和“群”的定义，阐述了分数槽永磁电机电枢磁动力谐波与永磁同步电机的关系，提出了广义的永磁同步电机概念。其次，采用理论分析和有限元分析的方法计算和比较了铁芯和永磁材料的损耗。提取各谐波对铁芯和永磁损耗的贡献，其中对转矩没有贡献的次谐波和槽谐波主要对铁芯和永磁损耗负责。第三，研究了定子槽开度、磁通屏障和PWM控制对铁心损耗、永磁损耗和转矩的影响。计算并展示了PMVM和PMSM在不同条件下的损耗，PMVM中的PM损耗要严重得多。最后，制作了两种永磁同步电机样机并进行了测试，测量了总损耗和效率，实验结果与有限元分析和理论分析吻合较好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Industry Applications 工程技术-工程：电子与电气

CiteScore

9.90

自引率

9.10%

发文量

747

审稿时长

3.3 months

期刊介绍： The scope of the IEEE Transactions on Industry Applications includes all scope items of the IEEE Industry Applications Society, that is, the advancement of the theory and practice of electrical and electronic engineering in the development, design, manufacture, and application of electrical systems, apparatus, devices, and controls to the processes and equipment of industry and commerce; the promotion of safe, reliable, and economic installations; industry leadership in energy conservation and environmental, health, and safety issues; the creation of voluntary engineering standards and recommended practices; and the professional development of its membership.