Innovative Design Optimization of Rotor Saliency in Tubular Variable Reluctance Resolvers via MEC

Tootoonchian, Farid; Zare, Fateme

doi:10.30503/eecs.2025.494192.1066

Innovative Design Optimization of Rotor Saliency in Tubular Variable Reluctance Resolvers via MEC

Document Type : Original Article

Authors

Farid Tootoonchian ¹

Fateme Zare ²

¹ Iran University of Science and Technology

² Dep. of elec. Engineering, Isfehan Uni. of technology

10.30503/eecs.2025.494192.1066

Abstract

Resolvers are essential position sensors used to determine rotational and linear positions. Based on their structure, they are classified into two main types: wound rotor resolvers and variable reluctance resolvers. This paper analyzes the performance of a tubular variable reluctance resolver using the Magnetic Equivalent Circuit (MEC) method. The proposed model's accuracy is validated by comparing its results with those obtained from 3D finite element simulations.
Furthermore, various configurations of the tubular variable reluctance resolver are examined, including the inner stator long mover, inner stator short mover, and outer stator long mover. Since the number of saliencies in the variable reluctance section significantly influences resolver performance, its effect on accuracy is analyzed for a fixed number of slots. The optimized configuration is identified as the inner stator long mover with five saliencies. Finally, the optimal configuration with the lowest error is experimentally tested, and the results from the fabricated prototype confirm the validity of the conducted studies.

Keywords

Linear Resolver

Tubular Resolver

Variable Reluctance Resolver

Magnetic Equivalent Circuit (MEC)

End Effect

Subjects