Analysis of Windings in Variable Reluctance Resolver

• Published in: IEEE transactions on magnetics Vol. 51; no. 5; pp. 1 - 10
• Main Authors: Ge, X., Zhu, Z. Q., Ren, R., Chen, J. T.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.05.2015; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Air gaps; Alternate winding; Coils; Finite element analysis; Harmonic analysis; Magnetism; Motors; resolver; Rotors; stator slot and rotor pole combination; Stator windings; variable reluctance; Windings; resolver; stator slot and rotor pole combination; variable reluctance (VR); Alternate winding
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2014.2369993

In this paper, the relationship between the numbers of stator slots, winding polarities, and rotor poles for variable reluctance resolvers is derived and verified, which makes it possible for the same stator and winding to be shared by the rotors with different poles. Based on the established relationship, a simple factor is introduced to evaluate the level of voltage harmonics as an index for choosing appropriate stator slot and rotor pole combinations. With due account for easy manufacturing, alternate windings are proposed without apparent deterioration in voltage harmonics of a resolver. In particular, alternate windings with nonoverlapping uniform coils are proved to be possible for output windings in some stator slot and rotor pole combinations, which further simplify the manufacture process. Finite element method is adopted to verify the proposed design, together with experiments on the prototypes.