Induction Motor Vector Control Based on Adaptive Identification of Rotor Resistance

In the induction motor frequency control system, the variation of rotor resistance which can be changed by the temperature rise and skin effect affects the estimation of rotor flux. The precise of rotor resistance restricts the performance of the control system. In order to improve of the vector control system, the rotor resistance must be identified real-time and accurately. According to model reference adaptive system(MRAS), a new method of rotor resistance identification based on rotor flux orientation is proposed. Based on Lyapunov stabilization theory, this method is simple, small amount of calculation and identification precision. The model of rotor resistance adaptive identification under induction motor vector control is completed using Matlab/Simulink. The simulation results certify that the proposed algorithm is useful to identify the rotor resistance precisely and rapidly.