自励式电磁涡流联轴器调速性能研究

针对永磁涡流联轴器调速结构复杂的问题，结合自励发电和涡流传动技术，提出一种新型自励式电磁涡流联轴器结构。通过建立自励发电和电涡流传动两部分的电磁场有限元数值模型，研究了自励式电磁涡流联轴器的发电特性和传动特性。通过对转速差、导体层和气隙长度对传动力矩影响的分析可以看出：转速差较小时，导体层选择电导率高的材料可以得到较大的力矩；铜层厚度由1mm增大到9mm时，传动力矩先增大后减小，在铜层厚度为5mm时达到最大；传动力矩随气隙长度增大而减小。

Research on Speed Regulation Performance of Self-excited Electromagnetic Eddy Current Couplings

Due to the complex structures of a permanent magnet eddy current coupling, this paper presented a novel structure of self-excited electromagnetic eddy current couplings, which combined the technology of excitation power generation and eddy current drive. The generating characteristics and the drive characteristics were studied on the self-excited electromagnetic eddy current couplings by establishing the finite element numerical model of the electromagnetic fields for excitation power generation and eddy current drive. The influences of rotational speed differences, conductor layers and air gap lengths on the driving torque were analyzed, then draw a conclusion that when the materials with high conductivity are used for the conductor layers, a larger torque at a low rotational speed differences may be obtained; when the thicknesses of copper layers increase from 1mm to 9mm, the driving torque increases first and then decreases, and the maximum of the driving torque is reached at thickness of 5mm. The driving torque reduces along with the increments of the air gap lengths.