Permanent Magnet Eddy Current Comparison of Surface Permanent Magnet Synchronous Motors with Different Permanent Magnet Shapes

摘要

This paper presents the comparisons of permanent magnet (PM) eddy current of surface permanent magnet synchronous motor (SPMSM) with different rare-earth magnet shapes. The PM eddy current is analyzed to compare for each shape by 2 dimensional (2D) finite element analysis (FEA). The eddy current and their loss of particular position of PM are displayed for each model. The effect of partly enlarged air-gap made by PM shape to PM eddy current is studied.