Study on decaying process of vacuum arc using real-time two dimensional spectroscopy

2020 Fiscal Year Final Research Report

• Project/Area Number: 19K23510
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0302:Electrical and electronic engineering and related fields
• Research Institution: Kanazawa University
• Principal Investigator: Nakano Yusuke 金沢大学, 電子情報通信学系, 助教 (60840668)
• Project Period (FY): 2019-08-30 – 2021-03-31
• Keywords: 真空アーク / アーク減衰過程 / プラズマ / 2次元分光測定 / 真空遮断器

Outline of Final Research Achievements

For the control of vacuum arc discharge in a vacuum switching equipment, this study aims to clarify the behavior of metal vapor in the vacuum arc decay process composed of metal vapor from electrodes, the physical properties of arc plasma, and the electrical insulation characteristics after current interruption.
In this research, experimental setup for vacuum arc generation and a real-time two-dimensional spectroscopic measurement system for the vacuum arc decay process using IGBTs for high reproducibility and high-speed response for observing the diffusion process of vacuum arcs, were constructed. From the two-dimensional spectroscopic observation results, the distribution of electrode materials of Cr, Cu and Cu + between the electrodes was clarified. Since Cu was ionized and existed as Cu +, which can directly be related to electrical conductivity of the residual arc.

Free Research Field

電力工学・電力変換・電気機器

Academic Significance and Societal Importance of the Research Achievements

構築した真空アーク減衰過程の実時間2次元分光測定系を用いた研究は国内外で例がないため，本分野の先導的研究となりうる．また，アークプラズマの物性および蒸気拡散メカニズムは蒸発金属材料に依存すると考えられ，電極材料の変更や投入電力の変更などにより電流遮断後の絶縁回復特性の議論が可能となると考えられる．