Simplified Winding Arrangement for Integrated Multiturn Resolvers

Winding configuration is a crucial factor that highly affects the accuracy of resolvers. A nonoptimal winding could also make the manufacturing process complicated and costly inefficient. In this article, an approach to determine the optimal winding configuration for the resolvers is proposed. This method is applicable for both wound rotor (WR) and variable reluctance (VR) resolvers, and significantly simplifies the winding configuration of resolvers with different pole pairs and teeth numbers. Based on the proposed approach, the winding configuration of multiturn resolvers, which are generally more complicated than single-turn resolvers, is simplified for WR and VR type resolver with different number of stator teeth. In this approach, the reliability of the sensor is also considered. The proposed winding facilitates the manufacturing process and decreases the production costs for the multiturn resolver. The three-dimensional time-stepping finite-element method is used to confirm the correctness of the analysis. Finally, a prototype of the sensor is built and tested to verify the validity of the proposed winding approach. The measured value of the average of absolute position error for 1X/5X resolver is 0.197°/0.081°, and the maximum position error is 0.716°/0.212°.