Research In Sensorless Vector Control Of Induction Motor Based On Mras Technique

Model Reference Adaptive System (MRAS) represents one of the most attractive and popular solutions for sensorless control of AC drive. According to the principle of asynchronous motor vector control,taking two phase rotating coordinates current model as the adjustable model and improved voltage model as reference model,a speed sensorless vector control system is built The model reference adaptive system (MRAS) method is used to identify system speed .Model reference adaptive system method is applied to asynchronous motor speed estimation and achieves speed sensorless control of asynchronous motor. The approach is implemented on Matlab /Simulink software.The simulation results show that the system has good control performance and accuracy. It proves the feasibility and practicability of the system.