Study of Al2O3 Ceramics’ Laser-Triggered Surface Flashover Characteristics with Pulsed Voltage
Pan Ruzheng1,Li Mintang2,Zhao Zhenghan1,Wang Youhua1,Wang Jue3,Yan Ping3
1. Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability, Hebei University of Technology Tianjin 300130 China; 2. Institute of Military Transportation, Military Transportation University Tianjin 300161 China; 3. Institute of Electrical Engineering, Chinese Academy of Sciences Beijing 100190 China
Abstract：With the aim of studying the characteristics of laser-triggered surface flashover with pulsed voltage, synchronization problem of laser pulse and voltage pulse is solved through a high precision laser trigger system is built up in test system. Experiment of laser-triggered surface flashover is carried out using the flat electrodes and columned insulators based on the test system. The material of electrode is copper and the material of insulator is Al2O3. Laser pulse’s wavelengths are 532nm and 1 064nm, and laser is focused with rectangle. The flashover delay time and jitter time are obtained through experiment, and the results of experiment show that flashover delay time and jitter time decrease with increase of pulsed voltage or laser energy density, the delay time of 1 064nm laser trigger is larger than that of 532nm laser trigger, and the delay time and jitter time in vacuum condition are less than the delay time and jitter time in air condition.
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2015, Vol. 30 
