Optimal flux loss model based of speed sensorless vector control induction motor

The paper presents a cheap and accurate loss model based controller to improve the efficiency and the power factor of the speed sensorless controlled induction motor. The proposed controller calculates the optimal air gap flux verifying high efficiency especially at light load, improving the power factor, and stable operation for a high load step disturbance. The proposed model is cheap where no additional hardware is required. The accuracy and the fast response of the proposed controller in comparison with an online search control method are proved by the experiment results. The efficiency, and the power factor improvements for speed sensorless induction motor by using the optimal flux compared with the rated flux are examined experimentally.