Arc Movement of Intermediate-Frequency Vacuum Arc on TMF Contacts
Arc Movement of Intermediate-Frequency Vacuum Arc on TMF Contacts
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DOI：
10.1109/tpwrd.2013.2272590
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发表时间：
2013-07
影响因子：
4.4
通讯作者：
Z. Liying;Wu Jianwen;Zhang Xueming
中科院分区：
文献类型：
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作者：
Z. Liying;Wu Jianwen;Zhang Xueming
本文描述了中频 (400-800 Hz) 横向磁场 (TMF) 接触中的电弧行为。通过高速摄影，确定了三种不同的电弧模式：膨胀弧柱、移动弧和扩散弧。扩展弧柱模式下，弧柱不动，弧柱直径随电流增大。在此阶段，出现明亮的阳极点，并伴有高电流下电弧电压的高振幅噪声。膨胀弧柱模式对阳极侵蚀起着重要作用。在移动弧柱模式下，观察到平均速度约为10-100 m/s，并且在相同电流下，电弧速度随着频率的增加而增加。本文得到了用电弧电流和频率表示的电弧电压。相同电流下，弧柱截面积随着频率的增加而减小。在一定电流下，电流密度随着频率的增加而增加。由此可见，在相同电流下，电弧速度随着频率的增加而增加。平均功率输入集中在较高频率下的较小区域。这可能是阳极局部熔化的原因之一。
This paper describes the arc behavior in the transverse-magnetic-field (TMF) contacts at intermediate frequency (400-800 Hz). With high-speed photography, three different arc modes were identified: expansion arc column, moving arc, and diffuse arc. In the expansion arc column mode, the arc column is immobile and the diameter of the arc column increases with the current. During this stage, the bright anode spots appear with high amplitude noise of arc voltage at high current. The expansion arc column mode plays an important role in the anode erosion. In the moving arc column mode, the average velocities were observed about 10-100 m/s, and the arc velocity increases with the increased frequency at the same current. The arc voltage expressed by arc current and frequency was obtained in this paper. The cross-section area of the arc column decreases with the increased frequency at the same current. The current density increases with the increased frequency at the certain current. Consequently, it is deduced that the arc velocity increases with the increased frequency at the same current. The mean power input concentrates in a smaller area at a higher frequency. It may be one of the reasons why the anode local melted.