摘要
为分析静电放电的辐射场及其对传输线与负载终端的影响,采用了一种基于脉冲函数的静电放电电流波形解析表达式计算了静电放电电磁脉冲辐射场并给出了近场和远场波形。结果表明放电电场包括由初始电荷引起的静电场和由放电电流引起的辐射场,在放电电极附近,静电场远大于辐射场,但静电场随空间距离衰减得很快,在远区场主要由放电电流引起的辐射场。利用传输线理论建立静电放电场对电长导线的耦合计算模型得出了静电放电辐射场在线上的感应电压和感应电流计算方程。
Electrostatic discharge （ESD） can bring strong electromagnetic radiation, namely ESD electromagnetic pulse （EMP）. On the basis of introduction of the characteristic and waveform of ESD current, a type of analytical expression of ESD wave, which is based on pulse function, is presented. Then several typical theoretical models are compared by using ESD field calculation, and adopting an improved dipole model based on dipole model put forward by P. F. Wilson. The improved dipole model considers contribution of original static charge. Using the improved model, ESD radiation fields are analyzed, and waveforms of close fields and far fields are given. The results show that E-field of ESD includes static E-field caused by original static charge and radiation field caused by ESD current. Close to discharged pole, static field is much stronger than radiation field, and the static field attenuates quickly with the ratio of cubic distance in the space, while the radiation field attenuates much slowly, so in the far space, the radiation field is stronger than static field. Using the transmission lines theory, calculating model of coupling of ESD EMP to electric long line is established, and equations of transient voltages and currents on wires induced by the ESD EMP are gained.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2008年第4期670-673,共4页
High Voltage Engineering
基金
国家自然科学基金重点项目(50237040)~~
关键词
静电放电(ESD)
电磁脉冲(EMP)
近场
远场
传输线
耦合
electrostatic discharge（ESD）
electromagnetic pulse（EMP）
close fields
far fields
transmission line
coupling
