静电电磁脉冲场诱发聚四氟乙烯材料表面闪络实验

doi:10.7527/S1000-6893.2021.25124

Abstract

Abstract: To understand the basic characteristics of the flashover of insulating materials induced by the electrostatic electromagnetic pulse radiation field in the natural environment, and to further analyze the characteristics of the induced flashover, the electrode voltage threshold of the surface flashover induced by the external field is analyzed using the Secondary Electron Emission Avalanche (SEEA) model.An experimental system of electrostatic electromagnetic pulse field induced flashover on the surface of Polytetrafluoroethylene (PTFE) is established under atmospheric conditions.The methods of theoretical analysis and experimental verification are used to explore the basic laws of the electrostatic electromagnetic pulse field inducing the flashover of the needle-plate electrode structure on the surface of the material, and the basic laws of flashover induction are obtained.The research results show that the electrostatic electromagnetic pulse field can induce flashover on the surface of the PTFE material.When external conditions remain unchanged, the probability of flashover induction increases with the increase of the strength of the electrostatic electromagnetic pulse radiation field.When the strength of the static electromagnetic pulse radiation field is constant, the voltage threshold for inducing flashover under this condition can be determined, and the probability of flashover induction increases with the increase of the voltage between the needle and the plate electrode.The laws obtained in our study can provide some guidance for the study of the flashover of insulating materials induced by strong electromagnetic pulses in the low-orbit environment.

Key words: PTFE, electromagnetic induction, surface flashover, electrostatic discharge, electrostatic electromagnetic pulse

CLC Number:

V19
TM863

ZHANG Yan, ZHANG Lu, LIU Shanghe, HU Xiaofeng, QIAN Yuxing, ZHANG Jianping. Experiment on electrostatic electromagnetic pulse field induced surface flashover of PTFE material[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(3): 425124-425124.

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Experiment on electrostatic electromagnetic pulse field induced surface flashover of PTFE material

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