A study on quenching characteristics of YBaCuO bulk superconductor with deposited Ag layer

Katsuya Fukuda, Hiroyuki Fujita, Koichiro Sawa, Masaru Tomita, Masato Murakami, Naomichi Sakai, Izumi Hirabayashi

研究成果: Conference contribution

抜粋

A persistent current switch (PCS) is used for superconducting applications, such as superconducting magnetic energy storage (SMES) system. The authors have proposed a mechanical switch of Y-Ba-Cu-O (YBCO) bulk as a mechanical PCS. In previous reports, in order to investigate the contact characteristics of the switch, 50A current test was performed and the contact resistance between two contacts was measured by four terminal method. As a result, it became clear that polishing and metal depositing on contact surfaces was effective methods to reduce the residual resistance, and the authors achieved to reduce this resistance to 0.64μΩ, which was less than our target value of 1μΩ. This paper focused on the greater current test (above 50A) in order to perform more practical experiment as PCS used for SMES. In this experiment, the authors examined the characteristics to normal conductive state in the YBCO, which was not obtained by former 50A current test. As a result, the transfer current is found to have a relationship with the layer thickness of deposited Ag on contact surfaces. The value of transfer current was rose by increasing the layer thickness of deposited silver, but saturated at around 0.60μm.

元の言語English
ホスト出版物のタイトルElectrical Contacts 2007
ホスト出版物のサブタイトルProceedings of the 53rd IEEE Holm Conference on Electrical Contacts
ページ76-81
ページ数6
DOI
出版物ステータスPublished - 2007 12 1
イベント53rd IEEE Holm Conference on Electrical Contacts, Holm 2007 - Pittsburgh, PA, United States
継続期間: 2007 9 162007 9 19

出版物シリーズ

名前Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts
ISSN(印刷物)0361-4395

Conference

Conference53rd IEEE Holm Conference on Electrical Contacts, Holm 2007
United States
Pittsburgh, PA
期間07/9/1607/9/19

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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  • これを引用

    Fukuda, K., Fujita, H., Sawa, K., Tomita, M., Murakami, M., Sakai, N., & Hirabayashi, I. (2007). A study on quenching characteristics of YBaCuO bulk superconductor with deposited Ag layer. : Electrical Contacts 2007: Proceedings of the 53rd IEEE Holm Conference on Electrical Contacts (pp. 76-81). [4318198] (Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts). https://doi.org/10.1109/HOLM.2007.4318198