盘形涡流制动装置中电磁场涡旋源密度变化分析

Analysis of density change of electromagnetic field scroll source in disc eddy current braking device

研究涡流电磁场的基本定律和作用关系,探究感应盘上的涡流电磁场的基本特征,对静态磁场在旋转导体上产生的涡流以及涡流感应电场对磁场的影响进行分析。从计算衍生电磁场涡旋源密度变化对磁电作用的影响,提出了周期变化的涡流感应电场对励磁线圈电流影响即产生互感效应的推论。推导涡流制动过程中旋转磁场变化特征,并对制动盘上感生电流即涡流分布进行分析。

The basic characteristic analysis of the eddy current electromagnetic field on the induction disk was performed by studying the basic law and relationship between the electromagnetic field.When a conductor rotated in a static magnetic field,it would generate the eddy current.The focus was put on the influence of eddy current induced electric field on magnetic field.According to the influence of derived electromagnetic field vortex source density on the magnetic field,it was supposed that the eddy current induced electric field has a real effect on the excitation current of the excitation coil.The change feature of rotating magnetic field during eddy current braking was deduced.Meanwhile,the induced current on the brake disc was analyzed.