Development of Coaxial Spark Switch and Experimental Study on Its Trigger Characteristics
Cheng Xian1,2, Li Taiyu1,2, Ge Guowei1,2, Wang Junqi1,2, Xia Rongxiang1,2
1. School of Electrical Engineering Zhengzhou University Zhengzhou 450001 China; 2. Henan Engineering Research Center of Power Transmission & Distribution Equipment and Electrical Insulation Zhengzhou 450001 China;
Abstract：High-precision nanosecond coaxial spark switches have a wide range of applications in the pulse power system. In order to satisfy the requirements of low jitter and long life, the novel coaxial field-distortion type sparks switch is proposed, which adopts a lateral auto-coupling design and uses ZS-1 quartz glass baffle with high ultraviolet transmittance to simulate ultra violet pre-ionization (UVPI). The high-voltage nanosecond pulse source based on Tesla transformer and pulse sharpening circuit is designed by combining the characteristics of pulse transformer and semiconductor components. The maximum voltage of the pulse source is 80kV and the rising time is 50ns. Then the test circuit of the coaxial spark switch is built and the switch triggering characteristics with the pre-ionization of ultraviolet light are tested. The static breakdown voltage characteristics are conducted. The trigger characteristics and contacts erosion with different working coefficients and UVPI are compared and analyzed. The influence of the trigger voltage and pulse width on the trigger characteristic is obtained. The results indicate that the jitter of the coaxial spark switch is below 2ns and it can work stably when the gas pressure is 0.1MPa and the coefficient is 76.1%. Increasing the trigger energy can improve the trigger characteristics and enhance the intensity of UVPI, which provides basis for the application of UVPI switch.
程显, 李泰煜, 葛国伟, 王俊启, 夏荣翔. 同轴型火花开关研制及其触发特性试验研究[J]. 电工技术学报, 2019, 34(16): 3480-3486.
Cheng Xian, Li Taiyu, Ge Guowei, Wang Junqi, Xia Rongxiang. Development of Coaxial Spark Switch and Experimental Study on Its Trigger Characteristics. Transactions of China Electrotechnical Society, 2019, 34(16): 3480-3486.
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2019, Vol. 34 
