电动车用永磁同步电机转子结构对弱磁调速性能分析  

Analysis of the Speed Adjusting Ability with Field Weakening of Rotor Structure of Permanent Magnet Synchronous Motor for Electric Vehicle

作　　者：温嘉斌[1] 郭晗 荆超 刘金辉 WEN Jia-bin;GUO Han;JING Chao;LIU Jin-hui(School of Electrical and Electronic Engineering,Harbin University of Science and Technology,Harbin 150080,China)

机构地区：[1]哈尔滨理工大学电气与电子工程学院,哈尔滨150080

出　　处：《哈尔滨理工大学学报》2019年第6期73-78,共6页Journal of Harbin University of Science and Technology

基　　金：黑龙江省自然科学基金(E201302).

摘　　要：针对电动汽车驱动电机既要满足低速区大转矩输出,同时又要满足高速恒功率区宽弱磁调速范围的特殊要求,提出采用具有铁桥分段的V型永磁同步电动机作为驱动电机。通过分析对比不同转子磁路结构对电机主要运行特性参数的影响表明:同时采用非均匀气隙、V型铁桥分段永磁体、改变相邻磁极间距,不仅有利于改善空载气隙磁密波形,而且也满足增加电机恒功率区弱磁扩速范围和低速区大转矩输出的要求。并采用这种结构设计了20 kW电动汽车驱动用内置式永磁同步电机,结合有限元对电机主要性能进行了电磁计算。The V-type permanent magnet synchronous motor with iron bridge segment is proposed as the driving motor for electric vehicle.This kind of motor needs to have big torque output in the low-speed region,as well as wide-speed adjusting range with field weakening in the high-speed constant power region.By analyzing and comparing the influence of different rotor magnetic circuit structure on the main parameters of motor running characteristics,we conclude that:the combination of non-uniform air gap,V-shaped iron bridge segmented permanent magnet,and the change of adjacent magnetic pole spacing improve the no-load air gap magnetic tight waveform,increase the motor constant power area of the wide-speed adjusting range with field weakening,and satisfy the requirement of large torque output in low speed zone.In this study,a built-in permanent magnet synchronous motor is designed to drive a 20kW electric vehicle,and the performance of the motor is evaluated by finite element method.

关 键 词：电动汽车 永磁同步电动机 弱磁扩速 交直轴电感 

分 类 号：TM313[电气工程—电机]