电动汽车用永磁同步电机涡流损耗分析及优化  

Analysis and Optimization of Eddy Current Losses in PMSM for Electric Vehicles

作　　者：宋腾飞[1,2] 燕秀龙 凌志豪 SONG Tengfei;YAN Xiulong;LING Zhihao(University of Electronic Science and Technology,Chengdu 610000,China;Suzhou Inovance Automotive Co.,Ltd.,Suzhou 215104,China)

机构地区：[1]电子科技大学,成都610000 [2]苏州汇川联合动力系统股份有限公司,苏州215104

出　　处：《微特电机》2025年第3期33-37,共5页Small & Special Electrical Machines

基　　金：国家重点研发计划(2022YFB2502704)资助项目。

摘　　要：以一台230 kW电动汽车用永磁同步电机为研究对象,建立了永磁体涡流计算理论模型和电机有限元计算模型,对永磁体在正弦及SVPWM供电下涡流损耗进行了计算,并对永磁体涡流损耗在整个电动汽车运行区间的损耗占比进行了分析。为了降低永磁体的涡流损耗,对径向、轴向两种永磁体分段方式进行了计算与对比。制作了相关样机并进行了实验测试,实测结果表明,分段永磁体结构相比于整段永磁体结构,电机综合路况效率提高了0.3%,验证了分段永磁体可有效降低内置式永磁同步电机的涡流损耗。Taking a 230 kW permanent magnet synchronous motor(PMSM)for electric vehicles(EVs)as the research object,a theoretical model for permanent magnet eddy current calculation and a finite element calculation model for the motor were established.The eddy current losses of permanent magnet under sinusoidal and PWM power supply were calculated,and the proportion of eddy current losses of permanent magnet in the entire operating range of the EVs was analyzed.Loss calculations and comparisons were carried out for the radial and axial segmentation methods of the permanent magnet.Relevant prototypes were made and experimental tests were conducted.The measured results showed that the segmented permanent magnet structure improved the comprehensive road condition efficiency of the motor by 0.3%compared to the integral permanent magnet structure,verifying that segmented permanent magnets can effectively reduce the eddy current loss of the interior PMSM.

关 键 词：永磁同步电机 电动汽车 涡流损耗 分段永磁体 

分 类 号：TM351[电气工程—电机]