三相感应电机SVM-DTC系统  

Three-phase Induction Motor SVM-DTC System

作　　者：刘健楠[1] 马西庚[1] 孔鹏[1] 李香香[1] 

机构地区：[1]中国石油大学(华东)信息与控制工程学院,山东东营257061

出　　处：《电气传动》2015年第5期21-25,共5页Electric Drive

摘　　要：传统的三相感应电动机直接转矩控制(DTC)方案中由于使用了滞环比较器与开关选择表,使得逆变器开关频率不固定,并会造成电机输出转矩脉动过大的问题。针对上述问题,引入了一种基于定子磁链定向的空间矢量调制(SVM)直接转矩控制方案,并对参考电压矢量采用了5段式合成方案。最后,通过Matlab/Simulink组件对系统进行建模仿真,并分别与传统直接转矩控制系统和基于12扇区划分的直接转矩控制系统进行了对比。结果表明,该系统能够克服直接转矩控制系统的固有缺点,有效降低电机转矩与定子磁链的脉动。Using hysteresis comparators and switch- table, drawbacks like variable switching frequency and large torque ripple are caused in the conventional three-phase induction motor direct torque control （DTC） system. In this case, a space vector modulation （SVM） DTC system based on stator flux orientation using five- section synthesis scheme for the reference voltage vector was proposed. Finally, the system was compared with the conventional DTC system and the system based on 12-sector by simulation through Matlab/Simulink. The results show that the system can overcome the shortcomings in conventional DTC system and reduces the torque and stator flux ripple effectively.

关 键 词：感应电机 直接转矩控制 空间矢量调制 5段式合成 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]