100kA微秒级气体火花开关电极材料熔蚀研究
Selection of gas spark gaps electrode material under microsecond 100kA current pulse
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摘要: 电极材料是影响气体火花开关性能和寿命的关键因素之一。基于热传导方程分析了电弧作用下电极表层的温度场分布，得出了电极材料以及电弧属性参数对温度场分布的影响，并对黄铜、不锈钢、钨铜合金和高密度石墨4种电极材料进行了电极熔蚀实验，其质量亏损率分别为：黄铜6.39mg/C，不锈钢6.38mg/C, WCu合金4.19mg/C，高密度石墨1.19mg/C，与理论计算基本一致。Abstract: Surface layer temperature distribution of electrode was analyzed based on the equation of heat conduction. The parameters of arc and electrode material that influence the temperature distribution were obtained. The electrode erosion experiment of brass, stainless steel, coppertungsten and graphite was carried out under 100kA microsecond arc for 300 pulses and 36 C charge transfer. The experimental results show that the mass loss rate of the four electrodes materials is 6.39mg/C for brass, 6-38mg/C for stainless steel, 4.19 mg/C for coppertungsten and 1.19mg/C for graphite respectively．
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Key words:
- gas spark gaps /
- electrode material /
- electrode erosion
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