高电压技术2013，Vol.39Issue(3)：727-732,6.DOI:10.3969/j.issn.1003-6520.2013.03.032
触发型3电极开关导通时延分析与数值计算
Analysis and Numerical Calculation on Breakdown Time of Three-electrode Trigatron Gap
摘要
Abstract
In order to offer assistance for the quantity estimation and analysis of time delay of three-electrode trigatron switches, a numerical model of the time delay was derived based on the electronic avalanche development theory and the streamer theory. In the model, whether the electrical field satisfied the Raether breakdown criterion for streamer formation was proposed to explain the difference of breakdown modes. To verify the mathematical model, a three-electrode trigatron gap was fabricated, and its characteristics in dry air were determined experimentally. Moreover, the influence of some different parameters on the gap's breakdown time was discussed, and it was found the gap more likely worked in directly breakdown mode. The experimental results and analysis demonstrate that the delay time curve can be divided into three regions by two inflection points of under-voltage ratio. The first inflection point is the low limit of under-voltage ratio for reliable breakdowns, and the second one is a transition point of the gap's breakdown mechanism. Considering the working reliability, the experimental results show that the operating voltage range of 0. 5~0. 7 is reasonable, providing a reference for design of three-electrode trigatron switches.关键词
导通时延/触发型3电极开关/欠压比/流注/导通机制/数值计算Key words
breakdown time/ three-electrode trigatron gap/ under-voltage ratio/ streamer/ breakdown mechanism/numerical calculation引用本文复制引用
蔡礼,蔡芸,林福昌,李黎,齐向东,鲍超斌..触发型3电极开关导通时延分析与数值计算[J].高电压技术,2013,39(3):727-732,6.基金项目
国家自然科学基金(51107049) （51107049）
华中科技大学自主创新基金(2011QN093). （2011QN093）
