双频逆变器供电型感应电动机SVM-DTC系统  

Inverter with Double-frequency Supplied SVM-DTC System of Induction Motor

作　　者：王明渝[1] 赵俊晖[1] 龙利[1] 周延静[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《电气传动》2009年第4期20-24,共5页Electric Drive

基　　金：重庆市自然科学基金(CSTC2007BB3169);重庆大学研究生科技创新基金(200706A1B0080208)

摘　　要：建立了基于双频逆变器供电的感应电机空间矢量调制直接转矩控制(SVM-DTC)系统。根据双频变换的思想推导出双频逆变器的拓扑结构,并分析了双频逆变器的工作模式。双频逆变器保持了与高频单元相同的动静态特性,同时由于低频单元分担了很大部分的开关电流,使系统减小了损耗,提高了效率。为了减小转矩脉动,同时对双频逆变器的高频部分实现恒频控制,对感应电机采用基于空间矢量调制(SVM)的直接转矩控制(DTC)系统。仿真结果表明,该方案对感应电机的控制具有很好的性能。A kind of inverter with double-frequency supplied space vector modulation direct torque control （SVM-DTC） of induction motor was proposed. According to the theory of the converter with double-frequency, the topology of a new kind of inverter with double-frequency was derived, and the working states were analyzed. This kind of inverter has good dynamic and static performance as the high frequency inverter. And since the low frequency unit shares the current of the high frequency unit, the loss is decreased. To reduce torque ripple and fix the switching frequency of the high frequency unit, the SVM-DTC theme is implemented in the system. The simulation results show the validity of this system.

关 键 词：双频逆变器 感应电动机 空间矢量调制 直接转矩控制 

分 类 号：TM301.2[电气工程—电机] TM346