Analysis of Surface Mounted Permanent Magnet Motors Using Combined Winding Function and Conformal Mapping Method

摘要

The conventional winding function theory (WFT) has main defects in the modeling of air-gap and magnetic saturation effect. Therefore, this paper presents an improved winding function theory (IWFT) for performance analysis of surface mounted permanent magnet (SMPM) motors, which removes all drawbacks of the conventional WFT. IWFT can precisely take into account the stator slotting, the winding distribution, the magnetic induction inside permanent magnets (PMs), the PM magnetization, and the magnetic saturation, simultaneously. To consider the harmonics of air-gap permeance, IWFT gets help from the conformal mapping (CM) method. The accuracy of this developed method is verified by comparing the results obtained through IWFT with the corresponding results obtained by conventional WFT, and finite element method (FEM).