Research On Adaptive Vector Control System Of Induction Motor

This dissertation is the research of the vector control system of asynchronous machine and the research of applying the adaptive control to the vector control system .It was vector control means, rotor flux' observation and adaptive estimation ofrotor speed as well that this dissertation emphases.First of all, introducing timing technical develop in recent years, the mode of speed regulation and vector control 'idea, this dissertation discussed the math model, co-ordinate vector change and asynchronous machine ' controllability and observability. Next, the mode of vector control and every part in vector control system were studied and the mode of flux-oriented was discussed. The focus rotor flux observation problem in directness vector control system with torque internal ring, rotation speed and flux closed loop was studied. A means of rotor flux' adaptation distinguish independent of rotor resistance was put forward. Making an approach to popular without speed sensor vector control system for the moment and putting forward an adaptive estimation means on-line about rotor speed.At the end of this dissertation, the study of simulation was applied to vector control system that this paper discussed and the simulation outcome was given out. Conclusion was made for research work and the further aim of research work was put forward.