Position sensorless control for wound-field synchronous motor with double three-phase wound stator using extended electromotive force model

In this paper, a position sensorless control method for the Wound-Field Synchronous Motor with Double Three-phase wound stator(D-WFSM) in middle or high speed driving is proposed. Extended electromotive force observer used commonly for PMSMs is selected for the target motor's position sensorless control method. However, the method is mainly used for motors with single-set stator and that for motors with two-set stator has not been applied. This is the first time to apply the position sensorless method based on extended electromotive force into WFSMs and two-set motors. Therefore, in this paper, a new extended electromotive force model for two-set motors is proposed. Then, the effectiveness of the proposed method is verified through experiments.