Study on vector control system of speed sensorless for induction motor

In order to realize the real-time identification of motor rotor speed,this paper proposes to estimate the motor speed by the voltage and current measured at the end-region of motor.Through the estimation,the model reference adaptive control for the vector control of speed sensorless can be achieved.In the MATLAB/Simulink,the vector control system of speed sensorless based on this method is established and the simulation experiment is carried out.Simulation result shows that this system enjoys good static dynamic state character and stability.