Influence of structural parameters of cartridge-type synchronous magnetic coupling on transmission performance

Abstract

The study of the structural parameters of the permanent magnet magnetic coupling is particularly important because they determine its transmission performance. In this paper, we first compare and analyze the results of theoretical calculation and simulation, and conclude that the calculation results of the 3D simulation model are closest to the actual situation. Maxwell software is used to study the effect of the cartridge type synchronous permanent magnet coupling on the transmitted torque at different working air gaps, permanent magnet thickness, yoke thickness, and aspect ratio under different pole numbers. The results show that: the increase of working air gap is not conducive to increasing the transmitted torque; the increase of permanent magnet thickness is beneficial to increase the transmitted torque, but the increase rate gradually decreases; the increase of yoke thickness has a small increase on the magnetic torque within a certain range, and the yoke thickness is slightly larger than the permanent magnet thickness is optimal; the increase of permanent magnet’s aspect ratio also increases the torque, and the torque density growth rate is the fastest when the aspect ratio is in the range of 0.5~0.7. Through the analysis, it is important for the design of synchronous magnetic coupling and other researches.