关键词: 永磁联轴器；涡流传动；软启动, 过载保护

Abstract:

This paper introduced the working principles and the advantages of the permanent magnet eddy current coupling systematically. The torque of permanent magnet coupling was calculated by the equivalent model using Faraday's law of  electromagnetic induction.According to lots of ANSYS Maxwell 3D simulations, the relationships among key parameters of permanent magnet coupling (the size of magnet, the number of magnet, the copper plate thickness and the air gap, etc.) and the torque characteristics were analyzed,which provided a strong support for the design.Applying the above analysis results, a coupling with 7.5kW,1500r/min was designed which had a new type of structure and the function of soft-start and the experimental results of the prototype met  the design requirements. The calculation and simulation method herein will be as references for the design of permanent magnetic coupling.

Key words: permanent magnetic coupling, eddy current drive, soft start, overload protection