A Study on the Electrical Characteristics of Metal-Clad GdBCO Coils

Jimin Kim, Jong Cheol Kim, Young Gyun Kim, Hyun Hee Son, Chang Ju Hyeon, Ho Min Kim, Haigun Lee

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

This paper reports the effectiveness of metal-cladding (MC) winding technique employing a GdBCO tape with a micrometer-thick stainless-steel clad as experimentally compared with that of the partial insulation (PI) winding technique. The investigation included charge-discharge, sudden-discharge, and overcurrent tests. The charge-discharge and sudden-discharge tests showed that the charge/discharge process of the coil using the metal-clad GdBCO tape was considerably shorter than those of the PI coils, because the effective resistance of the MC coil was higher than those of the PI coils. Although the MC coil exhibited lower electrical stability than the PI coils did (when the current is high enough), the MC coil was virtually more stable than any fully insulated coil. This study confirms that the MC winding technique is promising for the development of electrically stable high-field magnets allowing relatively high rates of ramping up and down.

Original languageEnglish
Article number8255554
JournalIEEE Transactions on Applied Superconductivity
Volume28
Issue number3
DOIs
Publication statusPublished - 2018 Apr

Bibliographical note

Funding Information:
Manuscript received August 28, 2017; accepted January 2, 2018. Date of publication January 12, 2018; date of current version January 23, 2018. This work was supported in part by the Materials and Components Technology Development Program of KEIT (10053590, Development of MgB2 wire and coil with a high critical current and long length for superconducting medical·electric power equipment). (Corresponding author: Haigun Lee.) J. Kim, J. C. Kim, Y.-G. Kim, H.-H. Son, and H. G. Lee are with the Department of Material Science and Engineering, Korea University, Seoul 136-713, South Korea (e-mail: haigunlee@korea.ac.kr).

Publisher Copyright:
© 2018 IEEE.

Keywords

  • Characteristic resistance
  • charging and discharging rate
  • electrical stability
  • metal-clad coil
  • partial insulation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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