无速度传感器直接转矩控制系统的MATLAB仿真

MATLAB simulation of speed sensorless direct torque control system

采用定子磁链u-n模型计算定子磁链,并在此基础上将模型参考自适应应用于直接转矩控制系统中,实现了系统的无速度传感器运行。针对3kW异步电动机,采用MATLAB/SIMULINK软件进行了仿真。仿真结果表明,该系统对电机定子磁链的观测精度高,速度运算较准确,在全速范围内能保持较高的性能。

In this DTC system simulation model, the estimation of the stator flux is based on u-n model. The model reference adaptive method is proposed to estimate the speed and realize a simple and high performance speed sensorless system. This approach has been implemented on MATLAB/SIMULINK software in 3kW drive. The simulation results show that the method gives satisfying estimation of stator flux and rotor speed in the whole speed range.