Experimental investigation of surface flashover in vacuum using nanosecond pulses

Based on a Marx generator and a coaxial pulse forming line, an experimental investigation of surface flashover characteristics in vacuum is conducted by using nanosecond pulses of 10 ns rise time and 30 ns full width at half maximum (FWHM). Insulator dielectrics chosen for this investigation are Tef...

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Bibliographic Details
Published in:IEEE transactions on dielectrics and electrical insulation 2007-06, Vol.14 (3), p.634-642
Main Authors: Yan, Ping, Shao, Tao, Wang, Jue, Gao, Wei, Yuan, Weiqun, Pan, Ruzheng, Zhang, Shichang, Sun, Guangsheng
Format: Article
Language:English
Subjects:
Character generation
Coaxial components
Contact angle
Dielectrics
Dielectrics and electrical insulation
Electrodes
Flashover
Gas insulation
Insulator testing
Insulators
Materials testing
Nanosecond pulses
Nanostructure
Polytetrafluoroethylenes
Pulse generation
Space vector pulse width modulation
Surface flashover
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Summary:Based on a Marx generator and a coaxial pulse forming line, an experimental investigation of surface flashover characteristics in vacuum is conducted by using nanosecond pulses of 10 ns rise time and 30 ns full width at half maximum (FWHM). Insulator dielectrics chosen for this investigation are Teflon, PMMA and Nylon. The tested factors include gas pressure, cone angle of conical frustum, diameter and length of cylindrical insulator, material and shape of electrode, and contact style between insulator and electrodes. The effects of these parameters on the surface flashover characteristics are described and analyzed in this paper. In addition, the character of flashover time lag in the nanosecond range, and surface flashover theory in vacuum charged by nanosecond pulses are also discussed.
ISSN:1070-9878
1558-4135
DOI:10.1109/TDEI.2007.369524