基于交互式MRAS理论的直接转矩控制系统

Direct Torque Control System Based on Mutual MRAS Scheme

在异步电机无速度传感器直接转矩控制系统中,电机定子电阻随着温度的变化而产生漂移进而影响整个系统的控制精度。利用交互式模型参考自适应系统(Mutual MRAS)在对转速进行辨识的同时能够精确地对定子电阻进行估计。使整个系统对电阻的变化具有较强的鲁棒性,提高了整个系统的控制精度。实验证明该控制方法的有效性。

The stator resistance variation can be generated when temperature changing in Speed-sensorless Direct Torque Control system. It could determinate the precision of control system. Mutual MRAS speed identification model was proposed to implement a speed sensorless direct torque control of induction motor, the stator resistance can be tracked very well. So the control system is not sensitive to the stator resistance variation. Computer simulations are given to show its effectives.