自励式电磁涡流联轴器调速性能研究

摘要

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1 mm增大到9 mm时,传动力矩先增大后减小,在铜层厚度为5 mm时达到最大;传动力矩随气隙长度增大而减小.%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 gen-eration 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 differ-ences may be obtained;when the thicknesses of copper layers increase from 1 mm to 9 mm,the driv-ing torque increases first and then decreases,and the maximum of the driving torque is reached at thickness of 5 mm.The driving torque reduces along with the increments of the air gap lengths.