Measuring, modeling, and decoupling of saturation-induced saliencies in carrier-signal injection-based sensorless AC drives

The focus of this paper is the measuring, modeling, and decoupling of satur ation-induced saliencies in carrier-signal injection-based sensorless contr ol. First, techniques for the measurement of saturation-induced saliencies are presented. The goal of these measurements is to provide useful informat ion on the position and magnitude of the various saturation-induced salienc ies. Using the results from several different experimental measurements, mo dels are developed explaining the source and behavior of the saturation-ind uced saliencies. The paper concludes by presenting methods for decoupling t he effects caused by the parasitic saturation-induced saliencies, eliminati ng the errors that they cause in rotor position or flux angle estimation.