Investigation on Sensorless PI-IFOC Speed Control Based Flux and Speed Estimator for High Power Induction Motor

This paper is to investigate the Proportional Integral (PI) controller that can be used with Indirect Filed Oriented Control (IFOC) mechanism. The PI controller used the parameters generated from the flux and speed estimator based on dq and park transformation of voltage and current inverter output. This estimator represents the sensorless technique that can be applied to the high-power AC motor rated at 20 Hp. The results are in good agreement where the estimator has less than 5% error between the speed estimator and reference speed controller which give faster response based on speed and flux controller with a superior performance on the IM speed.