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首页> 外文期刊>Contributions to Plasma Physics >Investigation of unstable motion characteristics of vacuum arc cathode spots between transverse magnetic field contacts
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Investigation of unstable motion characteristics of vacuum arc cathode spots between transverse magnetic field contacts

机译：横向磁场触点真空电弧阴极斑点的不稳定运动特性研究

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With the improvement of the current level of power grids, the requirements of the opening level of the vacuum switches are also increasing. Vacuum arc cathode spots provide steam and electrons and, to a certain extent, determine the opening capacity of the vacuum switch. In this paper, a vacuum arc cathode spot research platform based on the de-mountable vacuum chamber is constructed. The characteristics of the vacuum arc cathode spots under the transverse magnetic field (TMF) contacts are assessed by a high-speed charge coupled device. The experimental results show that the cathode spot diffusion process can be divided into three processes through cathode spot distribution, arc voltage and current: initial diffusion stage of cathode spots, unstable motion stage of cathode spots, and extinguishing stage. The motion mode of cathode spots during unstable motion stage can be divided into cathode spots group stagnation (CSGS) to multi-cathode jet (MCJ) switch mode, cathode spots group motion (CSGM) to MCJ switch mode, CSGM mode, and MCJ mode. The effects of peak current and contact diameter on unstable motion mode were analysed.
机译：随着电网电网电流水平的改进​​，真空开关的开口水平的要求也在增加。真空电弧阴极点提供蒸汽和电子，在一定程度上确定真空开关的开口容量。在本文中，构造了基于可去可固化真空室的真空电弧阴极点研究平台。通过高速电荷耦合装置评估横向磁场（TMF）触点下方的真空电弧阴极斑点的特性。实验结果表明，阴极点扩散过程可通过阴极点分布，电弧电压和电流：阴极斑点的初始扩散阶段分为三个过程，阴极斑点的不稳定运动阶段和灭火阶段。在不稳定运动级期间的阴极点的运动模式可以分为阴极点组停滞（CSG）到多阴极射流（MCJ）开关模式，阴极点组运动（CSGM）到MCJ开关模式，CSGM模式和MCJ模式。分析了峰值电流和接触直径对不稳定运动模式的影响。

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