瞬态脉冲的电小环辐射发射模型  

Radiation Emission Model of Short Electric Loops with Transient Pulse

作　　者：冯德旺[1,2] 

机构地区：[1]福建农林大学计算机与信息学院,福州350002 [2]中国矿业大学(北京)机电与信息工程学院,北京100083

出　　处：《江西理工大学学报》2010年第5期1-4,共4页Journal of Jiangxi University of Science and Technology

基　　金：国家自然科学基金资助项目(50674093);福建省教育厅资助项目(JB09297)

摘　　要：煤矿井下动力主要由电缆供电,开关操作产生的瞬态脉冲将通过电缆对井下电磁环境产生影响.以电快速瞬变脉冲群脉冲电流作为电小环的激励源,运用电磁场理论建立电小环的瞬态辐射发射模型,并进行数值分析,结果表明:在近场区,瞬态的电场和磁场都与距离r密切相关,瞬态电场随着1/r2变化,瞬态磁场随着1/r3变化,近场波阻抗随着r的增大而增大;在远场区,瞬态的电场和磁场都随着r的增大而减小,远场波阻抗不随r变化;瞬态辐射发射能量集中在脉冲的上升时间,说明高频部分在瞬态骚扰中起主要作用.Coal mine are mainly powered by cables,through which electrical fast transient burst generated by switching will impact on electromagnetic environment.with transient burst current as excitation source of short electric loops,the transient field radiation emission models are established under electromagnetic theory.And after numerical analysis,the results showed that,in the near-field region,electric field varies with 1/r2,and magnetic field changes with 1/r3,both of which are closely related with the distance.Besides,the wave impedance in the near-field region increases with the rise of r.In the far-field area,electric field and magnetic field are reduced with the rise of r,while the wave impedance in this area does not change in accordance with the change of r.Furthermore,transient radiation emission energy are concentrated on the burst rise time,which indicates high-frequency part play a major role in the transient disturbance.

关 键 词：电小环 瞬态场 辐射 电磁兼容 

分 类 号：TD655[矿业工程—矿山机电]