运动导体感应涡电流分布的解析计算与仿真验证

摘要

Analysis the distribution of eddy current in conductor excited by the electromagnetic field is important for understanding thoroughly the interaction between the conductors and the excitation sources in electromagnetic ap -plications .Due to its complexity , the problem of the eddy current distribution in moving conductor has not been in -vestigated widely .The expression of the eddy current inside the conductive plate is derived in the form of integral by using double Fourier transformation method , the distribution of the eddy current is determined by the parameters of excitation frequency , conductor material ’ s properties , shape of conductor and moving speed of conductor , et al.Un-der the same coil excitation , the effect of conductor ’ s moving speed to the distribution of eddy current on the conduc -tor surface is calculated and discussed .The analytical results are also verified with finite element method .The analyt-ical method has the advantage of convenient and fast calculation , it can also be used in other eddy current problems .%在电磁应用中，分析导体在电磁场激励作用下感应涡电流的分布有利于深入理解导体与激励源之间的相互作用。因其复杂性，运动导体在电磁场作用下涡电流分布的规律尚未得到充分研究。采用二维傅里叶变换方法，推导出圆形通电激励线圈作用下导电平板涡电流分布的积分形式表达式；该表达式与线圈的激励频率、导体的材料特性、形状及运动速度等参数有关。计算并分析了在相同线圈激励条件下，导体以不同速度运动时，表面涡电流密度分布特点，总结了导体运动速度对涡电流分布的影响规律；并用有限元方法对解析计算结果进行了验证。所采用的解析方法具有方便、快速的优点，该方法也可以用于其他涡电流问题的分析计算。