摘 要:针对复杂电磁环境下强电磁脉冲的毁伤效应,以高空核电磁脉冲(HEMP)为例,通过对电磁辐射屏蔽理论的介绍,分析 HEMP 的波形特征和频谱特性,研究 HEMP 效应下的屏蔽接地特性,得到了 HEMP 辐射环境下的屏蔽接地设计原则与方法。给出典型电磁屏蔽结构下的接地导体类型,分析传统搭接与接地方案在 HEMP 作用中的效应,提出能有效增加屏蔽效能和降低电磁损伤的搭接、接地改进方法,为电子电气设备抗强电磁脉冲防护加固提供了有效支撑。
关键词:HEMP;屏蔽接地;辐射;感应电流
DOI:10.19850/j.cnki.2096-4706.2022.24.011
中图分类号:TL76 文献标识码:A 文章编号:2096-4706(2022)24-0046-04
Research on Shield Grounding Method in Strong Electromagnetic Pulse Environment
TANG Rong
(Chengdu Siex Technology Co., Ltd., Chengdu 611731, China)
Abstract: Aiming at the damage effect of strong electromagnetic pulse in complex electromagnetic environment, taking the highaltitude nuclear electromagnetic pulse (HEMP) as an example, through the introduction of electromagnetic radiation shielding theory, the waveform characteristics and spectrum characteristics of HEMP are analyzed, the shielded grounding characteristics under HEMP effect are studied, and the shielded grounding design principles and methods under HEMP radiation environment are obtained. The types of grounding conductors under typical electromagnetic shielding structures are given, the effects of traditional bonding and grounding schemes on HEMP are analyzed, and an improved bonding and grounding method that can effectively increase shielding effectiveness and reduce electromagnetic damage is proposed, which provides effective support for strengthening the protection of electronic and electrical equipment against strong electromagnetic pulse.
Keywords: HEMP; shielded grounding; radiation; induced current
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作者简介:唐荣(1985—),男,汉族,重庆人,工程师,本科,研究方向:电磁兼容及电磁环境效应研究。