基于空间矢量调制的永磁同步电机新型直接转矩控制策略  

New Direct Torque Control Method for PMSM Based on Space Vector Pulse Width Modulation

作　　者：邢岩[1] 王旭[1] 刘岩[1] 杨丹[1] 

机构地区：[1]东北大学信息科学与工程学院,辽宁沈阳110819

出　　处：《电气传动》2013年第S1期6-10,共5页Electric Drive

基　　金：中央高校基础科研经费资助(N100304008)

摘　　要：永磁同步电机传统直接转矩控制稳态时有明显的磁链、转矩和电流脉动,而且开关频率不恒定,设计了一种基于参考空间电压矢量调制的直接转矩控制,用PI调节器模块代替了传统直接转矩控制中的滞环控制器,用空间电压矢量调制模块代替了传统直接转矩控制中的开关表,根据磁链和转矩偏差准确选择有效电压矢量及其作用时间。仿真结果表明,基于参考空间电压矢量调制的直接转矩控制在保持传统直接转矩控制响应快、鲁棒性优点的基础上,可以在很大的程度上减小磁链和转矩脉动,具有更好的动静态性能。Disadvantages of conventional direct torque control(DTC)systems for permanent magnet synchronous motors(PMSM)are notable torque,flux and current pulsations and variable switching frequency during steady state. A new method which combines space vector modulation(SVM) with direct torque control is proposed where the hysteresis controllers and the switch table in conventional DTC system are replaced by PI controller and SVM,respectively. The active voltage vectors are selected and the action time is calculated accurately according to torque and flux error. The simulation results indicate that the quick and robust response merits are preserved,also the method produced less flux linkage and torque ripple and have a better dynamic and static performance.

关 键 词：直接转矩控制 空间矢量调制 MATLAB/SIMULINK 永磁同步电机 

分 类 号：TM341[电气工程—电机]