Excitation inductance on-line identification method, current control method and system of linear induction motor

The invention discloses an excitation inductance on-line identification method, a current control method and a current control system of a linear induction motor, and belongs to the technical field of linear motor control, and the method comprises the steps: in each control period, calculating a back electromotive force observation value # imgabs1 # by taking # imgabs0 # as a reference model and calculating a back electromotive force em by taking # imgabs2 # as an adjustable model, and adaptively updating the observation value # imgabs4 # of the excitation inductance according to the # imgabs3 #, outputting the updated observation value of the excitation inductance as an identification result of the current control period, and applying the identification result of the excitation inductance to model prediction current control of the linear induction motor. According to the method, the influence of direct-current bias and current noise on online identification of the excitation inductance can be suppressed, and