Internal Model Based Adaptive Regulation for Stator Current of Induction Motors and Its Implementation

Within stator voltage equation of asynchronism motor in directional rotor magnetic field,there exists the cross coupling of excitation current and torque current.This make the regulation of torque current influenced by excitation current.An internal model based adaptive regulation for stator current of induction motors is proposed in the paper.The design methodology of the IMC based current regulator of internal model is presented and its dynamic and robust characterics are analyzed using matrix singular values.The on-line parameter identification of internal model is realized using RLS estimation and its implementation method is given on indirect rotor flux oriented control(IFOC) of induction motor drives.The simulating and experimental results have verified the satisfied performance of the adaptive internal model current control in IFOC induction motors.