Abstract: The permanent magnet couplings had problems of complex structure, difficult assembly and poor resistance to eccentric load. In terms of transmission performance evaluation, the finite element simulation calculation took a long time and the analytical calculation accuracy was low. Therefore, a new type of cylindrical permanent magnet coupling configuration was designed. The trapezoidal magnet and the wedge slot may realize the self-priming assembly of permanent magnets. Aiming at this configuration, an equivalent magnetic charge-magnetic circuit analytical calculation method was proposed to calculate the transfer torque and an absorption-repulsion composite permanent magnet coupling configuration was designed. The transfer torques where the relative deflection of inner and outer rotors as 0°~45° and the foces responde to radial relative offset -3.8~3.8 mm of two permanent magnet couplings were simulated and verified by experiments. The results show that the errors of the proposed analytical algorithm decreases 50% than that of the simulation results, and the analytical calculation time is shortened from 2 h to 2 min. Compared with cylindrical configuration, the maximum radial eccentric load of the suction-repulsion composite configuration is as 48.59%. Reasonable suggestions are put forward for design optimization of permanent magnet couplings.

Key words:  , cylindrical permanent magnet coupling, configuration design, transfer torque, equivalent magnetic charge

摘要： 永磁联轴器存在结构复杂、装配困难、抗偏载能力差等问题，传动性能评估中，有限元仿真计算时间长，解析计算准确性低。为此，设计了新型筒式永磁联轴器构型，梯形磁体与楔形插槽可实现永磁体自吸装配。针对该构型，提出了一种等效磁荷磁路解析计算方法计算传递转矩，并设计了一种吸斥复合永磁联轴器构型。对两种永磁联轴器在内外转子相对偏转0°~45°时的传递转矩、径向相对偏移-3.8~3.8 mm的受力情况进行了仿真及实验验证。研究结果表明，提出的解析算法较仿真结果误差减小50%，且解析计算用时由2 h缩短为2 min。与筒式构型相比，吸斥复合构型的径向偏载最大受力减小48.59%。最后为永磁联轴器设计优化提出了合理化建议。

关键词: 筒式永磁联轴器, 构型设计, 传递转矩, 等效磁荷