Simulation of current and temperature distribution in YBCO bulk's electrical contact

T. Imaizumi, N. Yamamoto, K. Sawa, M. Tomita, M. Murakami, I. Hirabayashi

研究成果: Article査読

8 被引用数 (Scopus)


We have proposed a mechanical switch of high-temperature superconductor (HTS) as a mechanical persistent current switch (PCS). Two YBCO bulks are mechanically mated and the current flows through contact. However, the contact resistance was too large to work as PCS. In previous work, we polished the contact surface in order to reduce the contact resistance; however, we were not able to reduce it easily. So, in addition to polishing the contact surface, we deposited the metals on the surface to reduce the contact resistance. Accordingly, the contact resistance can be drastically reduced. Based on the experimental results, we analyzed the temperature of the switch with Finite Element Method (FEM). The axisymmetrical three-dimensional model is used, and the temperature distribution is numerically obtained as a function of the current density. We have expected that analytical results would make a contribution to reduce the contact resistance.

ジャーナルPhysica C: Superconductivity and its applications
出版ステータスPublished - 2004 10月

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学


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