銀及び銅電極比較による真空アーク放電における電流遮断時の不安定現象の解析

カテゴリ: 全国大会

論文No: 1-158

グループ名: 【全国大会】平成30年電気学会全国大会論文集

発行日: 2018/03/05

タイトル(英語): Analysis of Instability Phenomenon at Current Interruption in Vacuum Arc Discharge Compared with Silver or Copper Electrode

著者名: 鎌田 憲嗣(King Mongkut’s University of Technology Thonburi),Narong Mungkung(King Mongkut’s University of Technology Thonburi),Pakpoom Chansri(King Mongkut’s University of Technology Thonburi),湯地 敏史(宮崎大学),木之下 広幸(宮崎大学),赤塚 洋(東京工業大学)

著者名(英語): Kamata Noritsugu(King Mongkuts University of Technology Thonburi),MungkungNarong(King Mongkuts University of Technology Thonburi),ChansriPakpoom(King Mongkuts University of Technology Thonburi),Yuji Toshifumi(University of Miyazaki),Kinoshita Hiroyuki(University of Miyazaki),Akatsuka Hiroshi(Tokyo Institute of Technology)

キーワード: 陰極点,アーク電流,銅,銀,不安定現象,真空アーク

要約(日本語): Vacuum circuit breakers have an issue of unstable current chopping phenomenon when the current is cut off. We modeled the cathode spot that ignores transition region in the collisionless sheath and collisional plasma region using eight equations with silver and copper electrode materials which presents low ionization tendency, and performed dichotomous simulation. The result showed that the changes in the work function at ambient temperature did not have great influence on the arc stability limit current both in the silver electrode and copper electrode. On contrary, the changes in the heat conductivity at ambient temperature affected greatly the arc stability limit current both in the silver and copper electrodes. Furthermore, we found out that the copper electrode showed unstable current phenomenon where no cathode spot is observed in the cathode ion sheath when the copper electrode is energized with current of 25A.

原稿種別: 日本語

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