基于瞬时无功功率的异步电机矢量控制在线参数辨识

受现场工况的影响,异步电机在运行过程中参数会发生改变,导致矢量控制定向失准、系统性能下降。考虑到电机的电流模型需要使用互感Lm和转子时间常数Tr参数,利用瞬时无功功率构造在线参数辨识的自适应率,对其进行在线辨识。当系统处于有载状态时辨识,无载状态时辨识。仿真结果证明该方法不受定子电阻的影响,是切实有效的。

On-line Parameter Estimation of Vector Controlled Asynchronous Motor Based on Instantaneous Reactive Power

Asynchronous motor's parameters are varied by the field working-condition during running,which will result in misalignment of vector control and decline of system performance.Applying the instantaneous reactive power to construct the adaptive rate of on-line parameters estimation,mutual magnetic Lm and rotor time constant Tr will be used by the current model of motor to realize on-line estimation.1/Tr is estimated with load,while is estimated without load.Simulation results show that this method is effectiv...