Excitation Temperature Imaging of Vacuum Arc Based on Two-Line Radiance Method
Excitation Temperature Imaging of Vacuum Arc Based on Two-Line Radiance Method
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DOI：
10.1109/tps.2021.3077971
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发表时间：
2021-06-01
影响因子：
1.5
通讯作者：
Sakaki, Masayuki
中科院分区：
文献类型：
--
作者：
Ejiri, Haruki;Kikuchi, Ryo;Sakaki, Masayuki
基于510.6 nm和515.3 nm两个Cu I光谱的强度比，测量了大电流真空电弧的激发温度。利用多成像光学系统和高速摄像机测量了在5-mm间隙、10-mm phi电极、Cu100、Cu80Cr20和Cu50Cr50 wt.%触点之间点燃的弥漫模真空电弧，其峰值电流为2 kA。结果表明，激发温度在间隙内分布均匀。电流峰值激发温度随电极材料的不同而升高，依次为Cu100、Cu80Cr20、Cu50Cr50。用光谱法测量了激发温度，结果与用多成像光学系统和高速摄像机测量的结果一致。利用半导体开关在交流50hz电流峰值处模拟直流中断的降电流相位，实现了电流降零比为30 a /mu s。Cu100电极的激发温度随着电流的减小而降低，而Cu80Cr20和Cu50Cr50电极的激发温度则升高。这一差异表明，开发直流真空断路器需要优化电极材料、电流波形和间隙内等离子体参数。
The excitation temperature of the high-current vacuum arc was measured based on the intensity ratio of two Cu I spectra of 510.6 and 515.3 nm. Diffuse mode vacuum arcs with the peak current of 2 kA, igniting between 5-mm gap, 10-mm phi electrodes, Cu100, Cu80Cr20, and Cu50Cr50 wt.% contacts were measured by a multiple- imaging optical system and high-speed video camera. It turns out that the excitation temperature was almost evenly distributed in the gap. The excitation temperature at the current peak depended on the electrode material and took higher in the order of Cu100, Cu80Cr20, and Cu50Cr50. The excitation temperature was also measured by a spectroscopic approach, and it showed the same tendencies as the measurement using multiple-imaging optical systems and a high-speed video camera. The current decreasing phase of dc interruption was simulated by using semiconductor switches at the peak of ac 50-Hz current, and as a result, the current zero with a decreasing ratio of 30 A/mu s was realized. The excitation temperature for the Cu100 electrode decreased with the decreasing current, whereas those for Cu80Cr20 and Cu50Cr50 increased. This difference suggests that developing direct current vacuum circuit breakers needs the optimization of the electrode materials, current waveform, and plasma parameters in the gap.