A novel variable reluctance resolver for HEV/EV applications

In order to simplify the manufacturing process of variable reluctance (VR) resolvers for HEV/EV applications, a novel VR resolver with non-overlapping tooth-coil windings is proposed in this paper. A comparison of the winding configurations is firstly carried out between the existing and the proposed designs, followed by the description of the operating principle. Further, the influence of actual application conditions is investigated by finite element (FE) analyses, including operating speed and assembling eccentricity. In addition, identical stator and windings of the novel design can be employed in 3 resolvers of different rotor saliencies. The voltage difference amongst the 3 rotor combinations, as well as the detecting accuracy, is further investigated. Finally, prototypes are fabricated and tested to verify the analyses.