无速度传感器直接转矩控制系统仿真研究

The Simulation Research of Speed Sensor-Less Direct Torque Control System

针对异步电机无速度传感器直接转矩控制中由于磁链观测误差导致电机低速性能不好的问题,采用闭环磁链状态观测器观测定转子磁链。在此基础上分别对自适应转速辨识法和直接计算转速辨识法进行了仿真研究,并比较了两种方法的优缺点,为实践应用提供了一定的参考。

This paper aims at the problem of the poor performances of motor with low speed caused by the flux observation errors in the direct torque control of asynchronous machine with speed sensor-less,and the closed loop flux state observer is adopted to observe and measure the flux,on the basis of which,the simulation study is made of the adaptive rotor speed identification method and the direct calculating rotor speed method respectively. And also, the advantages and disadvantages of two methods are compared whereby providing a certain reference for the practical application.