Output voltage correction of an induction motor drive using a disturbance observer with speed sensor-less vector control method

This paper applies and evaluates a method for error voltage correction using a disturbance observer for an induction motor where will be controlled by speed-sensor-less vector method. The disturbance observer uses a fast-response observer, which responses ten times as fast as a current controller in sensor-less vector control. The voltage error is efficiently corrected by using the proposed method. The proposed method is validated on the basis of the experimental results. This method can reduce the current distortion to about 1/3 times smaller.