低速工况车用永磁同步电动机直接转矩控制研究  

Research on Direct Torque Control with Permanent Synchronous Motors for Vehicle in Low Speed

作　　者：黄智宇[1,2] 李景俊[1,2] 鲜知良 尤云功 

机构地区：[1]重庆邮电大学,重庆400065 [2]重庆高校汽车电子与嵌入式系统工程研究中心,重庆400065

出　　处：《微特电机》2014年第6期43-47,共5页Small & Special Electrical Machines

基　　金：重庆市基础与前沿研究计划项目(cstc2013jcyj-A40042);重庆市科技人才培养计划资助项目(cstc2013kjrc-qnrc40005)

摘　　要：永磁同步电动机直接转矩控制具有动态响应快、结构简单的特点,但在低速工况存在磁链和转矩脉动,会导致低速性能差的问题。本文以电动汽车用永磁同步电动机为研究对象,在低速工况下通过对传统直接转矩控制策略进行分析和改进,根据电动汽车驱动系统特性,完成了直接转矩控制算法设计、模型搭建及代码自动生成,最后结合电机测试台架,对永磁同步电动机在低速工况下的控制性能进行测试。实验结果表明改进后的直接转矩控制系统在低速工况下具有良好的启动和调速性能。Direct torque control for permanent magnet synchronous motor has fast dynamic response and simple structure,but there are flux and torque ripple in low-speed conditions which will lead to bad performance of low-speed problem.An electric vehicle with permanent magnet synchronous motor was proposed,the traditional direct torque control（DTC） strategy in low-speed conditions was analyzed and improved.The direct torque control algorithm design,model building and code automatically generated were completed.The DTC system was tested in low-speed condition combined with the test bench of motor.The results show that the improved DTC has better performance of start and speed control in low-speed condition.

关 键 词：直接转矩控制 电动汽车 永磁同步电动机 低速工况 

分 类 号：TM351[电气工程—电机] TM341