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LTD模块气体开关电极材料烧蚀性能实验

Electrode erosion performance test of LTD stage gas spark switches

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摘要

针对直线变压器驱动源(LTD)对开关的长寿命需求, 基于前期研制的200 kV低抖动多间隙气体开关电极几何参数以及开关通流水平, 详细开展了不同电极材料(钼、黄铜、铜钨合金、高密度石墨、304和321不锈钢 )的烧蚀性能实验。实验结果表明, 在单次电荷转移量15.4 mC, 脉冲电流20 kA条件下, 体积烧蚀速率从大到小依次为: 石墨、黄铜、铜钨合金、钼、不锈钢。电极烧蚀微观形貌分析表明, 不锈钢是用于LTD开关相对较好的电极材料。根据不锈钢电极的体积烧蚀速率, 可知理论上LTD开关的运行寿命可以超过1×106次, 但前提是开关外壳需保持足够的绝缘强度。

Abstract

To extend the lifetime of gas switches used by linear transformer drivers (LTD), electrode erosion tests for different materials (molybdenum, brass, copper-tungsten alloy, high density graphite, stainless steel 304 and 321) were conducted. These electrodes were designed according to the geometry and switching ability of the 200 kV low jitter multi-gap switches made before. Measurements show that under the condition of 20 kA peak current and 15.4 mC transferring charge, volume erosion rates decrease following the order of high density graphite, brass, copper-tungsten alloy, molybdenum and stainless steel. This relation, together with the electrode surface morphology images, shows that stainless steel works better than the other materials as LTD switch electrodes. According to the obtained volume erosion rates, the theoretical lifetime of an LTD switch using stainless steel electrodes could exceed 1 million times, provided that the insulation strength of the switch shell doesn’t fail.

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中图分类号:TM836

DOI:10.11884/hplpb201426.085005

所属栏目:脉冲功率技术

基金项目:国家自然科学基金项目(51177155)

收稿日期:2013-12-25

修改稿日期:2014-03-13

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作者单位    点击查看

刘瑜:中国工程物理研究院 流体物理研究所, 脉冲功率科学与技术重点实验室, 四川 绵阳 621900
陈林:中国工程物理研究院 流体物理研究所, 脉冲功率科学与技术重点实验室, 四川 绵阳 621900
戴英敏:中国工程物理研究院 流体物理研究所, 脉冲功率科学与技术重点实验室, 四川 绵阳 621900
章乐:中国工程物理研究院 流体物理研究所, 脉冲功率科学与技术重点实验室, 四川 绵阳 621900
王杰:中国工程物理研究院 流体物理研究所, 脉冲功率科学与技术重点实验室, 四川 绵阳 621900
金博:中国工程物理研究院 流体物理研究所, 脉冲功率科学与技术重点实验室, 四川 绵阳 621900
张元军:中国工程物理研究院 流体物理研究所, 脉冲功率科学与技术重点实验室, 四川 绵阳 621900

联系人作者:刘瑜(cindyeva@163.com)

备注:刘瑜(1985-), 女, 硕士, 主要从事脉冲功率技术方面的研究;

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引用该论文

Liu Yu,Chen Lin,Dai Yingmin,Zhang Le,Wang Jie,Jin Bo,Zhang Yuanjun. Electrode erosion performance test of LTD stage gas spark switches[J]. High Power Laser and Particle Beams, 2014, 26(8): 085005

刘瑜,陈林,戴英敏,章乐,王杰,金博,张元军. LTD模块气体开关电极材料烧蚀性能实验[J]. 强激光与粒子束, 2014, 26(8): 085005

被引情况

【1】胡博,李杰,朱朋,沈瑞琪,叶迎华,吴立志. 基于Parylene C的单触发开关性能实验研究. 强激光与粒子束, 2015, 27(6): 64103--1

【2】罗启平,刘毅,涂源,李志远,韩毅博,林福昌. 大脉冲电流下钨铜电极水和空气中的烧蚀特性. 强激光与粒子束, 2015, 27(11): 115003--1

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