异步电机无速度传感器控制系统转子时间常数辨识

Asynchronous Motor Speed-Sensorless AC Drives With Rotor Time Constant Parameter Identification

提出了一种能同时在线辨识转子时间常数和转速的方法。构造了基于无功功率模型辨识转速,转子时间常数辨识采用小信号分析方法,辨识误差由速度估计误差和转矩电流两者的高频分量的乘积得到,实现了电机转子时间常数和转速的同时辨识。仿真试验结果表明,转速和转子时间常数可以准确、快速地跟踪实际值变化。

A method that could simultaneously identify the rotor time constant and the speed on-line was presented. The constructing model based on the instantaneous reactive power to identify the speed,and the rotor time constant estimation used the small signal analysis method. The identification error was obtained by correlation of the high-frequency components of the speed estimator error and the torque producing current,thus enabling simultaneous estimation of the IM speed and the rotor time constant. The simulation results showed that,the speed and the rotor time constant could track the change of the actual values accurately and quickly.