Mras Based Speed Estimator for Vector Controlled Induction Motor Drives
نویسندگان
چکیده
1,2 Department of EEE, Sree Buddha College of Engineering, Pattoor, Alappuzha Abstract— Model Reference Adaptive System (MRAS) based speed sensorless estimation of vector controlled induction motor drives are presented in this paper. New speed and current estimation techniques are presented. These are used to formulate a single current sensor based vector controlled drive. The proposed method is immune to stator resistance variation. MRAS is a speed estimation method having two models. The error between the two models estimates the required speed. With the help of a vector rotator the two phase currents are transformed to actual values of d and q axis currents. The current estimation on the other side extracts the information of the phase currents in two phase stationary reference frame by using the corresponding synchronous reference frame variables and the vector rotator. The new speed and current estimation techniques are simulated in MATLAB/SIMULINK. Keywords— Induction Motor, Vector Control, Sensorless Control, Speed Estimation, MRAS, Current Estimation
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