基于模型参考方法的感应电机磁链的自适应观测及参数辨识

Adaptive Flux Estimation and Parameters Identification of Induction Motors Based on Model Reference Approach

提出一种基于模型参考方法的自适应定子磁链观测器,这种观测器不必预先知道电机的任何参数值,并且因运行时电机参数发生改变而发生的观测偏差也是收敛的。当电机的激励电压满足所谓“充分激励”的条件时,还可以同时作为参数辨识器;即使输入电压不满足充分激励的条件,但如果部分参数已知,仍然可以辨识其余的参数。仿真和实验结果验证了该方法的正确性。

Based on model reference approach, an adaptive stator flux estimator for an induction motor is put forward. Estimating error caused by parameters mismatch is convergent while machine is operating. The estimator can be used for parameter identifier on condition that input voltage is a persistent excitation. Given one of the parameters or more, the rest can still be identified by this estimator even if input voltage is not persistent. The validity and practicability is verified by simulation and experiment results.