Speed Estimation Methods Based on MRAS

In order to solve the speed estimation problems of speed sensorless vector-controlled induction motordrives,based on the paper MRAS identification theory,by the use of the voltage vector induction to estimates the motor speed,the results of the motor speed estimates is effective and the simulation experiment is consistent,therefore,the proposed MRAS based on speed sensorless vector-controlled induction motor drives have good performance in stady-state and transient-state operation.It shows the MRAS and the voltage vector induction are feasibility and the correctness.