基于空间矢量调制的直接转矩控制  

Direct torque control based on space vector modulation

作　　者：景晓东[1] 高赟[1] 李燕涛[2] 王坤 

机构地区：[1]西安科技大学电气与控制工程学院,陕西西安710054 [2]渭南广播电视发射台,陕西渭南714000 [3]中国新时代国际工程公司,陕西西安710054

出　　处：《工矿自动化》2013年第9期96-99,共4页Journal Of Mine Automation

基　　金：陕西省教育厅科研项目(09JK568)

摘　　要：针对传统的直接转矩控制存在较大的转矩和磁链脉动问题,提出了一种基于空间矢量调制的直接转矩控制策略。该控制策略采用磁链、转矩PI控制器代替传统直接转矩控制系统中的滞环比较器,以空间矢量脉宽调制代替电压矢量开关表合成电压矢量,来补偿磁链误差和转矩误差,达到消除滞环脉动的目的。Matlab/Simulink仿真结果表明,基于空间矢量调制的电动机控制系统相对于传统的直接转矩控制系统,磁链轨迹更接近圆形,转矩、磁链和电流响应脉动更小。In view of problems of big ripple of torque and flux linkage of traditional direct torque control,the paper proposed a control strategy of direct torque control based on space vector modulation.The control strategy uses flux and torque PI controller to instead of hysteresis comparator of traditional direct torque control system,and adopts space vector pulse width modulation to instead of voltage vector switch to synthetic voltage vector which can compensate for flux error and torque error to avoid hysteresis ripple.The Matlab/Simulink simulation result shows that the flux truck of control system of motor based on space vector pulse width modulation is more closed to round,and its torque and flux and current ripple is smaller compared with the traditional direct torque control system.

关 键 词：异步电动机 直接转矩 空间矢量脉宽调制 圆形磁链 

分 类 号：TD614[矿业工程—矿山机电]