摘  要：为研究轴向磁化多环磁力联轴器的结构参数对磁转矩的影响，采用有限元方法对其三维磁场进行数值计算，得出了轴向磁化多环磁力联轴器的三维磁场分布。分析了主动转子转角、气隙厚度、永磁体厚度和磁极对数对磁转矩的影响，即以一对磁极转角为周期，磁转矩与转角成类似正弦曲线关系变化，且在360°/2p时磁转矩存在最大值；随着气隙厚度的增加，联轴器的磁转矩降低；增大永磁体厚度，可提高磁转矩，但当永磁体厚度增大到一定程度后，磁转矩曲线的斜率逐渐变小，增加变慢；在一定范围内，增加联轴器的磁极对数，磁转矩增大，但磁极对数增加到一定数目后，随着磁极对数的继续增加，磁转矩降低。其分析结果可对该类磁力联轴器性能分析和设计起指导作用。
关键词：轴向磁化；三维磁场；磁转矩；有限元

Abstract: In order to study the impact on its magetic touque of the structural parameters in axial magnetized polycyclic coupling,the finite element method was adopted to calculate the 3-D magnetic field of the axial magnetized polycyclic coupling,and the 3-D magnetic field form was distributed.How the rotating angle,the length of air-gap,the thickness of magnets poles and the number of magnet poles influenced on the magnetic torque were analyzed.That is in a rotating angle cycle,the relationship between the magnetic torque and the rotating angle was sine curve,and the maximum magnetic torque could be obtained at rotating angle is 360°/2p;the magnetic torque was declined with the length of air-gap increased;the magnetic torque was increased with the thickness of magnet poles increased,but it can’t be always increased;the magnetic torque was increased with the number of magnet poles increased in a definite range,and then the magnetic torque decteased.The analysis results could guide values for the design and performance analysis of the axial magnetization polycyclic coupling.
Key words: axial-magnetized;3-D magnetic field;magnetic torque;finite element method