摘  要：为了精确计算水下航行体推进装置用无铁心永磁盘式电机的绕组涡流损耗，提出一种分段式三维磁场有限元法。该方法通过三维磁场有限元分析得出电机三维气隙磁密，然后采样气隙主磁通与绕组端部处磁密切向和轴向分量，再经过傅里叶分解得出各次谐波分布，从而计算出绕组涡流损耗。文章通过仿真分析与试验验证，结果表明该方法较分段式等效直线电机二维有限元法的计算结果更精确。
关键词：分段式；三维磁场有限元；涡流损耗；无铁心；永磁盘式电机

Abstract:  In order to accurately calculate the winding eddy current loss of Axial-Flux-Permanent-Magnet(AFPM) brushless machines without stator cores，which is used for propelling underwater vehicles，this paper proposed a segmental 3D magnetic field finite element analysis method．Through the 3D magnetic field FEA，the 3D air-gap magnetic density of machine can be obtained，then tangential and radial field component of main flux and winding end were sampled．By using FFT，each high-order of harmonic wave distribution was obtained, and the calculation of winding eddy current loss was done．Through simulation analysis and experiment verification，the results show that this method is more accurate than the segmental equivalent line motor 2D FEA．
Key words:  segmental；3D magnetic field FEA；eddy current loss；coreless；AFPM Machine