Contact resistance characteristics of high temperature superconducting bulk

Tomokazu Sakai, Naoki Yamamoto, Koichiro Sawa, Masaru Tomita, Masato Murakami

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

13 Citations (Scopus)

Abstract

A Persistent Current Switch (PCS) is a key component for Superconducting Magnetic Energy Storage (SMES) system because it is used to change a superconducting coil from storage mode to transfer mode. In the previous paper, YBa 2Cu 3O 6+δ (YBCO) bulk of High-temperature superconductor (HTS) was proposed as a switch material, and the test on the fundamental characteristics of a mechanical contact between two YBCO bulks was carried out. As a result, a switching phenomenon between low and high resistance ranges is observed at a threshold current value in V-I characteristics of the YBCO contact. The threshold current is called a transfer current. In this paper, the relation between surface treatment and transfer current is investigated and the transfer current is found to be larger in finely finished surface. And instability of contact voltage is observed in the low resistance range. Further, a numerical analysis of the current and temperature distributions is tried to clarify the transition between high and low contact resistance ranges.

Original languageEnglish
Title of host publicationElectrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts
Pages206-211
Number of pages6
Publication statusPublished - 2002
Externally publishedYes
Event48th IEEE Holm COnference on Elctronical Contacts - Orlando, FL, United States
Duration: 2002 Oct 212002 Oct 23

Other

Other48th IEEE Holm COnference on Elctronical Contacts
CountryUnited States
CityOrlando, FL
Period02/10/2102/10/23

Fingerprint

Contact resistance
Switches
High temperature superconductors
Energy storage
Surface treatment
Numerical analysis
Temperature distribution
Temperature
Electric potential
Superconducting coils

Keywords

  • Contact resistance
  • High-temperature superconductor
  • Transfer current
  • YBCO

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Sakai, T., Yamamoto, N., Sawa, K., Tomita, M., & Murakami, M. (2002). Contact resistance characteristics of high temperature superconducting bulk. In Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts (pp. 206-211)

Contact resistance characteristics of high temperature superconducting bulk. / Sakai, Tomokazu; Yamamoto, Naoki; Sawa, Koichiro; Tomita, Masaru; Murakami, Masato.

Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts. 2002. p. 206-211.

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

Sakai, T, Yamamoto, N, Sawa, K, Tomita, M & Murakami, M 2002, Contact resistance characteristics of high temperature superconducting bulk. in Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts. pp. 206-211, 48th IEEE Holm COnference on Elctronical Contacts, Orlando, FL, United States, 02/10/21.
Sakai T, Yamamoto N, Sawa K, Tomita M, Murakami M. Contact resistance characteristics of high temperature superconducting bulk. In Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts. 2002. p. 206-211
Sakai, Tomokazu ; Yamamoto, Naoki ; Sawa, Koichiro ; Tomita, Masaru ; Murakami, Masato. / Contact resistance characteristics of high temperature superconducting bulk. Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts. 2002. pp. 206-211
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