The Study Of Adaptive Vector Control System For Asynchronous Motor

Based on speed control strategies of the asynchronous motor vector control system, its current condition and development in home and abroad, in this thesis analyzes the research achievements of using adaptive control as the speed control strategy.Expounded the vector control principle, and built up the mathematics model of the asynchronous motor and analyzed the sensitivity to parameter of vector control of asynchronous motor. Based on this, the reduced-order load torque observer and rotor magnet chain observer is designed, which are used to observe the disturbance of the load torque and variety of the motor's parameter. The results are used to adjust the asynchronous motor system throw adaptive control to control law on line to improve resisting interference. Finally, using the computer simulation tools Matlab/Simulink to simulate and analyze, the results verified the proposed method is effective, that is to say, vector control system of asynchronous motor which uses adaptive control strategy is robustness and high dynamic.