Optimization of a Reluctance Resolver

Variable reluctance (VR) resolver is a transducer used for detecting rotational speed and position. It is an electromagnetic system and is good in reliability and durability. In the paper, an optimization model for the rotor shape of a VR is presented. The shape of the rotor is described by Fourier series. Taguchi optimization method combined with finite element method (FEM) is used to explore the optimal rotor shape for achieving the minimum error of angular position of VR. In the optimization, FEM is used to calculate the design sample, and verify the proposed design from Taguchi analysis. The object function of the optimization is built for identifying the error of the angular position. A VR with 3-pole pairs is used as example to show the effectiveness of the optimization model.