Contact resistance characteristics of high temperature superconducting Bulk- III

Takuya Imaizumi, Naoki Yamamoto, Masaru Tomita, Naomichi Sakai, Masato Murakami, Izumi Hirabayashi, Koichiro Sawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Citations (Scopus)

Abstract

A persistent current switch (PCS) is used for superconducting applications, such as superconducting magnetic energy storage (SMES) system. We have proposed a mechanical switch of high-temperature superconductor (HTS) as a mechanical PCS. In the previous paper, the sample surfaces were carefully polished and deposited with metals. As a result, the transfer current exceeded 30A, and the contact resistance reduced to 6μΩ at constant load 500N. In this paper, the experiment result when depositing metal thickly, and the relation between contact resistance and load were reported. Reduction of contact resistance and load was tried by depositing metals. Consequently, contact resistance was able to be reduced. When depositing indium, the increase of contact resistance by load reduction was able to be suppressed. Additionally, based on the experimental results and surface observation, we analyzed the current density and temperature distribution of the switch with finite element method (FEM). This analysis result may lead to the elucidation of a contact mechanism.

Original languageEnglish
Title of host publicationProceedings of the 50th IEEE Holm Conference on Electrical Contacts and the 22nd International Conference on Electrical Contacts
Pages416-420
Number of pages5
Publication statusPublished - 2004 Dec 1
EventProceedings of the 50th IEEE Holm Conference on Electrical Contacts and the 22nd International Conference on Electrical Contacts - Seattle, WA, United States
Duration: 2004 Sep 202004 Sep 23

Publication series

NameProceedings of the 50th IEEE Holm Conference on Electrical Contacts and the 22nd International Conference on Electrical Contacts

Conference

ConferenceProceedings of the 50th IEEE Holm Conference on Electrical Contacts and the 22nd International Conference on Electrical Contacts
CountryUnited States
CitySeattle, WA
Period04/9/2004/9/23

Keywords

  • Contact resistance
  • High -Temperature superconductor
  • Persistent current switch
  • Transfer current
  • YBCO

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Imaizumi, T., Yamamoto, N., Tomita, M., Sakai, N., Murakami, M., Hirabayashi, I., & Sawa, K. (2004). Contact resistance characteristics of high temperature superconducting Bulk- III. In Proceedings of the 50th IEEE Holm Conference on Electrical Contacts and the 22nd International Conference on Electrical Contacts (pp. 416-420). (Proceedings of the 50th IEEE Holm Conference on Electrical Contacts and the 22nd International Conference on Electrical Contacts).