真空アークにおける陰極からの電子放出を考慮した陰極シースの数値解析手法の開発

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2024/07/01

タイトル(英語): Development of Numerical Analysis Method for Cathode Sheath Considering Electron Emission from Cathode in Vacuum Arc

著者名: 髙木　真宏（東京都市大学大学院総合理工学研究科電気・化学専攻），鈴木　裕斗（東京都市大学大学院総合理工学研究科電気・化学専攻），鈴木　祐揮（東京都市大学大学院総合理工学研究科電気・化学専攻），根本　雄介（東京高等専門学校電気工学科），岩尾　徹（東京都市大学理工学部電気電子通信工学科），中島　達人（東京都市大学理工学部電気電子通信工学科）

著者名(英語): Masahiro Takagi (Electrical Engineering and Chemistry, Graduate School of Integrative Science and Engineering, Tokyo City University), Hiroto Suzuki (Electrical Engineering and Chemistry, Graduate School of Integrative Science and Engineering, Tokyo City University), Yuki Suzuki (Electrical Engineering and Chemistry, Graduate School of Integrative Science and Engineering, Tokyo City University), Yusuke Nemoto (Department of Electrical Engineering, National Institute of Technology, Tokyo College), Toru Iwao (Department of Electrical, Electronics and Communication Engineering, Faculty of Engineering, Tokyo City University), Tatsuhito Nakajima (Department of Electrical, Electronics and Communication Engineering, Faculty of Engineering, Tokyo City University)

キーワード: 真空アーク，陰極点，陰極シース，電子放出，空間電荷，陰極降下電圧　　vacuum arc，cathode spot，cathode sheath，electron emission，space charge，cathode sheath voltage

要約(英語): It has been required to develop simulation of vacuum arcs as a tool to aid electrode design in vacuum circuit breakers. Although the development of electromagnetic thermo-fluid simulations for vacuum arcs has been reported, most of them do not take cathode sheath phenomena into account and have not been able to reproduce vacuum arc phenomena, especially cathode spots. As the first step, the cathode sheath voltage, cathode surface electric field, and temperature and field (T-F) electron emission current were analyzed numerically on the basis of the space charge in the cathode sheath. In this paper, the cathode sheath was assumed to exist when the charge density induced on the cathode surface is positive, and the temperature and density of vacuum arc plasma and cathode temperature, which are physical quantities obtained by electromagnetic thermo-fluid simulation, were used as parameters of the analysis. As a result, the cathode sheath voltage, electric field, and electron emission current density can be calculated from the vacuum arc plasma temperature, density, and cathode temperature. Numerical results show that the electron emission current density has a dominant effect on the presence or absence of the cathode sheath.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.144 No.7 （2024）

本誌掲載ページ: 272-279 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/144/7/144_272/_article/-char/ja/