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Drawn vacuum arc behaviors of 1/2 coil-type axial magnetic field contact

机译：1/2线圈型轴向磁场接触的抽真空电弧行为

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The objective of this paper is to investigate the transition of drawn vacuum arc anode discharge modes of the 1/2 coil-type axial magnetic field contacts. The diameter of the contact used in the experiment include 60 mm and 63 mm. The opening velocity is 1.5 m/s from the contact separation to the 75% of full contact stroke of 15 mm. A dynamic solid angle ΩI as well as ΩII is used to evaluate the transition of anode discharge mode. Either the ΩI or the ΩI is defined as a ratio of contact diameter on contact separation, at which the transition from intense arc mode to diffuse arc mode or from the diffuse arc mode to the anode spot mode occurs, respectively. Test results show that the transition from intense arc mode into diffuse arc mode is dominated by the ΩI, rather than the axial magnetic flux density Baxial. However, the transition from diffuse arc mode into anode spot mode is dominated by the Baxial, rather than the ΩII. The arcing interval tI, from the initiation of vacuum arc to the evolving of the intense arc mode into diffuse arc mode, increases with the decreasing of ΩI, and with the increasing of Baxial. The arcing interval tII, from the initiation of vacuum arc to the formation of the anode spot, increases with the decreasing of ΩII, and with the increasing of Baxial.
机译：本文的目的是研究1/2线圈型轴向磁场触点的抽真空电弧阳极放电模式的转变。实验中使用的触点直径包括60毫米和63毫米。从触点分离到15 mm的全触点行程的75％的打开速度为1.5 m / s。动态立体角ΩI和ΩII用于评估阳极放电模式的过渡。 ΩI或ΩI分别定义为在接触分离时发生接触直径的比率，在该比率下会发生从强电弧模式到扩散电弧模式或从扩散电弧模式到阳极点模式的转变。测试结果表明，从强电弧模式到扩散电弧模式的过渡主要由ΩI决定，而不是由轴向磁通密度Baxial决定。但是，从扩散电弧模式到阳极点模式的过渡主要由Baxial而不是ΩII决定。从真空电弧的产生到强电弧模式演变成扩散电弧模式的电弧间隔tI随ΩI的减小和B轴的增大而增大。从产生真空电弧到形成阳极斑点的电弧间隔tII随着ΩII的减小和Baxial的增大而增大。

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