Improved instantaneous reactive power compensator applied sensorless control of IPMSM with adaptive back EMF and current model observer

This paper presents the sensorless control method that employs the adaptive back-EMF(Electromotive Force) and current model observer(CMO) of interior permanent magnet synchronous motor(IPMSM) with improved instantaneous reactive power compensator(IRP). The estimated back EMF considering a saliency is obtained by using the adaptive control method. The estimated EMF is inputted to the CMO for estimating the position and speed of the rotor. In order to improve the shortcomings of conventional compensation method with IRP, the modified instantaneous reactive power compensator which is considering the saliency-based EMF is applied. The validity of the control system presented is verified by the simulation.