【作者】 廖敏夫； 段雄英； 邹积岩；

【Author】 LIAO Min-fu DUAN Xiong-ying ZOU Ji-yan (Dept.of Electrical and Electronic Engineering,Dalian University of Technology,Dalian 116024,China)

【机构】 大连理工大学电气工程与应用电子技术系；

【摘要】 介绍了场击穿型触发真空开关的基本结构和工作过程。从场击穿型触发真空开关场致发射击穿机理的分析出发,通过数学建模,引入热力学运动方程,建立了场击穿型触发真空开关的真空放电阴极斑点热传导模型,它可以用来描述和估算场击穿方式下触发真空开关的时延特性。然后以初始等离子体的产生与扩展机理为重点,讨论了场击穿型触发真空开关的时延特性,进行了实验和仿真分析计算,研究表明,所建立的阴极斑点热传导模型其时延计算结果和实验数据较为吻合,证明了计算模型的正确性。更多还原

【Abstract】 The basic structure and operated process of the field-breakdown triggered vacuum switch(TVS)were depicted.The field-breakdown mechanism was analyzed.Based on introducing the behavior of heat in solids,the heat conduction model was set up for describing the heating process of the spots on the cathode,which occurred in the field-breakdown TVS when triggered.The models can be used for explaining the initial plasma’s production and expansion mechanism and calculating the breakdown delay time on the improvement of the initial plasma produced by the trigger electrodes.For the field-breakdown TVS,the calculation using the heat conduction model was carried out.The calculation results confirm with experimental data very well.更多还原