等离子体接触器放电特性试验研究  

Experimental research on discharge characteristics of plasma contactor

作　　者：冯杰[1] 王彦龙[1] 刘明正[1] 田立成[1] 刘士永[1] 张健新 FENG Jie;WANG Yanlong;LIU Mingzheng;TIAN Licheng;LIU Shiyong;ZHANG Jianxin(Science and Technology on Vacuum Technology and Physics Laboratory,Institute of Physics,Lanzhou 730000,China)

机构地区：[1]兰州空间技术物理研究所真空技术与物理重点实验室

出　　处：《火箭推进》2019年第3期81-86,共6页Journal of Rocket Propulsion

基　　金：载人航天预研项目(YZR0702)

摘　　要：为了研究等离子体接触器的伏安特性,设计试验分别测试了单支和双支等离子体接触器工作时的伏安特性,并给出了等离子体接触器钳位电压、偏置电压以及触持电压随偏置电流的变化规律。试验结果表明:供气流率的提升有利于接触器放电效率的改进;等离子体接触器钳位电压、触持电压与偏置电流之间呈现出不同的规律,前者呈现为正阻特性,后者呈现为负阻特性;两支等离子体接触器同时工作时相互之间存在影响,额定值为5A时,两支接触器的发射电流分别为8A和2A,因此采用双接触器同时工作时,应尽量采用伏安特性接近的阴极以减小差异性。In order to study the volt-ampere characteristics of plasma contactor, an experiment was designed and conducted to test the volt-ampere characteristics of single and double plasma contactors.In addition, the variation of the clamp voltage, bias voltage and contact voltage of the plasma contactor with the bias current is given.The test results show that the increase of the air supply rate is beneficial to the improvement of discharge efficiency.There is a different law between the clamp voltage, the keeper voltage and the bias current of the plasma contactor.The former shows positive resistance characteristic, while the later shows negative resistance characteristic.Two plasma contactors affect each other while working simultaneously.When the rated value is 5 A, the emission currents of two contactors are 8 A and 2 A, respectively.Therefore, when using double contactors at the same time, the volt-ampere characteristics should be adopted as close as possible to reduce the difference.

关 键 词：等离子体接触器 伏安特性 正阻特性 负阻特性 

分 类 号：V439[航空宇航科学与技术—航空宇航推进理论与工程]