Instantaneous power control of induction machines using a novel filtering approach on the back-EMF estimates

The instantaneous power control algorithm (IPC) has been presented recently as an alternative to field oriented control (FOC) and direct torque control (DTC) for induction machine drive systems. However, implementation issues have prevented experimental results from achieving the results obtained in simulation. This paper addresses the main issue that causes a disparity between the simulation and experimental results - the quality of the back-emf estimates used in the IPC algorithm. In addition, a sensorless control strategy that naturally arises from measurements available in IPC will be briefly discussed.