异步电机无速度传感器矢量控制系统中扩展卡尔曼滤波器的优化研究

Research on optimimized extended kalman filter for speed sensorless vector control of induction motor drive

利用扩展卡尔曼滤波器,将转速看成一个状态量,根据定子的电流和电压值估算转速。通过仿真对滤波器初值的选取进行了研究,得到优化的卡尔曼滤波器,试验结果表明,速度估算的准确性高,系统对于电机参数的变化不敏感,具有较强的鲁棒性。

Base on the stator currents and stator voltages,take the rotor speed as a state variable of the system,this paper presents a Extended Kalman Filter to estimate the rotor speed.The optimized Filter is got by choosing the proper initial value.The experiment results show estimation values of the speed have a high veracity and system is insensitive to the machine parameter variations and performance a strong robustness.