Improved Method for Electromagnetic Analysis of Axial-Flux Permanent-Magnet Motor With 3-D Leakage Flux in Overhang Structures

Abstract

In this study, an improved analytical technique for axial-flux permanent-magnet (AFPM) motors is proposed, considering overhang and end leakage flux effects. To account for leakage flux at permanent magnet ends and overhang effects, flux coefficients are determined through the magnetic equivalent circuit (MEC) method and incorporated into the subdomain method. The accuracy of this improved analytical technique is verified by comparing the results with those obtained from 3-D finite element analysis. The proposed method achieves a balance between computational efficiency and accuracy, providing an effective method for AFPM motor design and analysis.