Abstract: The working principles and advantages of permanent magnet eddy-current coupling were introduced for high-power couplings. The magnetic circuit was analyzed,torque of the coupling was calculated by reluctance method, the relationship among structural parameters（the thickness of copper, the thickness of magnetizer, the length of air gap, the thickness of permanent magnet, the number of permanent magnet , relative speed）with torque was obtained. The distribution of the magnetic field and eddy current of the coupling was obtained by Ansoft Maxwell, and the influences of the structural parameters on the torques and axial forces were analyzed.

Key words: coupling, permanent magnet, eddy-current, high-power

摘要： 阐述了永磁涡流联轴器的结构和工作原理，针对所研究的大功率永磁涡流联轴器，建立了其等效磁路，并利用磁阻法对联轴器转矩进行了计算，得到了结构参数（铜盘厚度、导磁盘厚度、气隙长度、永磁体厚度、永磁体数量、相对转速）与转矩的关系。运用Ansoft Maxwell软件得到了联轴器的磁场及涡电流的分布情况，分析了结构参数对转矩和轴向力的影响。

关键词: 联轴器, 永磁, 涡流, 大功率