内置式双V型断桥结构永磁同步电机空载电磁性能解析计算

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DOI：10. 15938/j. emc. 2025.05.004

中图分类号：TM351 文献标志码：A 文章编号：1007-449X（2025）05-0031-10

Analytical calculation of no-load electromagnetic performance for interior permanent magnet synchronous motor with double-V magnetic bridge break shape

YU Boxue'，LIU Guangwei1， SONG Zhihuan²， MEI Tianyu1， YUE Qian¹， ZHANG Fengge 1 （204号（1.School of Electrical Engineering，Shenyang University of Technology，Shenyang 110870，China;2.Hasco Automotive Electric Drive System Co.，Ltd.，Shanghai 201323，China）

Abstract ： With the development of traction motors for new energy vehicles toward higher rotational speeds and power density， magnetic flux leakage in rotor bridges has emerged as a primary constraint on flux utilization eficiency. To address this challenge，an interior permanent magnet synchronous motor （IPMSM） was proposed featuring a novel dual-V-shaped broken-bridge rotor structure. The design eliminates conventional external flux barriers and interpolar ribs，effctively blocking leakage flux paths and improving permanent magnet utilization.To enable rapid calculation of the no-load air-gap magnetic field in this structure ，a hierarchical analytical modeling approach was developed based on the subdomain method. By the proposed method，the dual-V-shaped rotor was decomposed into two independent V-shaped substructures，their respective magnetic field distributions were computed，and the results were superimposed while icorporating correction coeffcients to account for the modulation effects of zero-flux regions.Validation against finite element analysis demonstrates excellent agreement，with only a 3.4% deviation in no-load back-EMF calculation. The results confirm that the proposed method provides both computational efficiency and accuracy in predicting electromagnetic performance，offering avaluable analytical tool for optimizing multi-layer interior permanent magnet motor designs.

Keywords：interior permanent magnet synchronous motor; magnetic bridge break ; analytical model; subdomain method ;layered analytical modeling;complex relative permeance function

0引言

随着新能源汽车的发展，内置式永磁同步电机逐渐向多层化和复杂化方向演变，以实现更高功率密度和更宽调速范围[1]。（剩余11296字）