酸化亜鉛（ZnO）バリスタ素子内雷インパルス電流分布のFDTD解析

カテゴリ: 論文誌(論文単位)

グループ名: 【B】電力・エネルギー部門

発行日: 2016/11/01

タイトル(英語): FDTD Analysis of Lightning Impulse Current Distribution Inside of ZnO Varistor Element

著者名: 塚本　直之（音羽電機工業（株）），今任　俊介（同志社大学理工学部電気工学科），馬場　吉弘（同志社大学理工学部電気工学科），石井　勝（東京大学大学院工学系研究科先端電力エネルギー・環境技術教育研究センター）

著者名(英語): Naoyuki Tsukamoto (Otowa Electric Co., Ltd.), Shunsuke Imato (Doshisha University, Department of Electrical Engineering), Yoshihiro Baba (Doshisha University, Department of Electrical Engineering), Masaru Ishii (APET, Graduate School of Engineering, The University of Tokyo)

キーワード: バリスタ，ZnO素子，サージ耐量，SPD，FDTD　　metal-oxide varistor，ZnO element，surge withstand capability，SPD，FDTD

要約(英語): Distributions of transient electric field and current density in and around a metal oxide varistor, which has a diameter of 42mm and a thickness of 36mm, have been studied using the finite-difference time-domain (FDTD) method. The current injected into the varistor is a lightning impulse current having a peak of 100kA and a risetime of 4-μs. The varistor is represented with many nonlinear cubic cells of 3mm × 3mm × 3mm. The cell has a nonlinear resistivity―electric field characteristic in each of x, y and z directions, which is based on the measured nonlinear voltage―current characteristic. It follows from the FDTD analyses that the skin effect of the 42-mm-diameter varistor is insignificant for a lightning current having a rise time of 4-μs. However, if there is small difference of the nonlinear characteristic of ZnO element between its periphery and other parts, the distributions of electric field and current density are considerably affected, which may result in enhanced degradation or failure of the varistor.

本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.136 No.11 （2016）

本誌掲載ページ: 839-845 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/ieejpes/136/11/136_839/_article/-char/ja/