Subdomain model for predicting armature reaction field of dual-stator consequent-pole PM machines accounting for tooth-tips

Abstract

This paper presents an exact analytical subdomain model of dual-stator consequent-pole permanent-magnet (DSCPPM) machines accounting for tooth-tips, which can accurately predict the armature reaction field distribution in DSCPPM machines. In the proposed subdomain model, the field domain is composed of four types of sub-regions, viz. magnets, outer/inner air gaps, slots and slot openings. The analytical expressions of vector potential in each sub-region are determined by boundary and interface conditions. In comparison to the analytically predicted results, the corresponding flux density field distributions computed by finite element (FE) method are analyzed, which confirms the excellent accuracy of the developed subdomain model.