Improved Simulation for Sensorless Vector Control System on MRAS

The speed sensorless vector control system was established based on the fundamental equations of induction motor for vector control.This paper proposes a novel scheme for a speed sensorless vector control system of induction motor based on MRAS.As the traditional MRAS uses pure integrator,which results in accumulated error and DC offset problem easily,the paper presents the improved integral model rotor flux estimation model by increasing filter.On the platform Matlab/Simulink,the system was simulated.Simulation results show that the motor speed error is approximately 1%,and the system has better dynamic performance and better load disturbances attenuation.