基于交互式变参数MRAS的直接转矩控制系统

在异步电动机无速度传感器控制系统中,转速估计的精确度对电机内部模型参数误差非常敏感.为消除速度估计误差,电机参数通过一交互式模型参考自适应系统(MRAS)在线辨识,在此基础上建立了一个改进的变参数速度辨识数学模型,并在无速度传感器异步电动机矢量控制系统中对该速度辨识模型进行了研究,实验结果证明了该控制系统的有效性以及速度估计具有较高的精确度.

Direct Torque Control System Based on Mutual and Variable Parameter MRAS

The accuracy of the rotor speed estimation in speed sensorless direct torque control system of induction motor is sensitive to parameter errors of the internal machine model.To eliminate the speed estimation error,the machine parameters were adapted on-line,based on a mutual model reference adaptive system(MRAS).An improved MRAS model was built with variable parameters.The detailed simulation researches were tested on the speed-sensorless direct torque control.Experimental results prove that the control system is effective with good accuracy of speed estimation.