Thermal and electrical properties of thermal-grease-insulated REBCO superconducting coils with respect to winding tension

Jung Bin Song, Yoon Hyuck Choi, Dong Gyu Yang, Young Gyun Kim, Seong Gyeom Kim, Yeon Suk Choi, Haigun Lee

Research output: Contribution to journalArticle

Abstract

This study investigates the thermal and electrical characteristics of a silicon-based grease insulation (GI) GdBCO coil with respect to the winding tension through charge, sudden discharge, and over-current tests. Charge and sudden discharge test results demonstrate that the charging/discharging delay time increases as the winding tension increases; this is because the characteristic resistance of the coil decreases due to the reduced contact resistance. The over-current test results confirm that the thermal/electrical stabilities of the GI coil are considerably enhanced with an increased winding tension resulting from improved thermal contact and the decrease in the electrical contact resistance between the turn-to-turn layers of the coil. Thus, as the winding tension increases, the charging/discharging rates decrease whereas the thermal/electrical stabilities improve. Overall, selecting the appropriate winding tension for a GI coil is critical for achieving thermal/electrical stabilities, as well as ameliorating the charging/discharging delay phenomenon generally observed in a no-insulation coil.

Original languageEnglish
Pages (from-to)1050-1055
Number of pages6
JournalMetals and Materials International
Volume23
Issue number5
DOIs
Publication statusPublished - 2017 Sep 1

Fingerprint

greases
Lubricating greases
Electric properties
coils
Thermodynamic properties
thermodynamic properties
electrical properties
Insulation
insulation
charging
Contact resistance
contact resistance
Silicon
Time delay
Superconducting coils
Hot Temperature
electric contacts
time lag
silicon

Keywords

  • electrical properties
  • grease insulation
  • superconductors
  • thermal conductivity
  • winding tension

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Cite this

Thermal and electrical properties of thermal-grease-insulated REBCO superconducting coils with respect to winding tension. / Song, Jung Bin; Choi, Yoon Hyuck; Yang, Dong Gyu; Kim, Young Gyun; Kim, Seong Gyeom; Choi, Yeon Suk; Lee, Haigun.

In: Metals and Materials International, Vol. 23, No. 5, 01.09.2017, p. 1050-1055.

Research output: Contribution to journalArticle

Song, Jung Bin ; Choi, Yoon Hyuck ; Yang, Dong Gyu ; Kim, Young Gyun ; Kim, Seong Gyeom ; Choi, Yeon Suk ; Lee, Haigun. / Thermal and electrical properties of thermal-grease-insulated REBCO superconducting coils with respect to winding tension. In: Metals and Materials International. 2017 ; Vol. 23, No. 5. pp. 1050-1055.
@article{206c6396368749e08582481f41a07fd2,
title = "Thermal and electrical properties of thermal-grease-insulated REBCO superconducting coils with respect to winding tension",
abstract = "This study investigates the thermal and electrical characteristics of a silicon-based grease insulation (GI) GdBCO coil with respect to the winding tension through charge, sudden discharge, and over-current tests. Charge and sudden discharge test results demonstrate that the charging/discharging delay time increases as the winding tension increases; this is because the characteristic resistance of the coil decreases due to the reduced contact resistance. The over-current test results confirm that the thermal/electrical stabilities of the GI coil are considerably enhanced with an increased winding tension resulting from improved thermal contact and the decrease in the electrical contact resistance between the turn-to-turn layers of the coil. Thus, as the winding tension increases, the charging/discharging rates decrease whereas the thermal/electrical stabilities improve. Overall, selecting the appropriate winding tension for a GI coil is critical for achieving thermal/electrical stabilities, as well as ameliorating the charging/discharging delay phenomenon generally observed in a no-insulation coil.",
keywords = "electrical properties, grease insulation, superconductors, thermal conductivity, winding tension",
author = "Song, {Jung Bin} and Choi, {Yoon Hyuck} and Yang, {Dong Gyu} and Kim, {Young Gyun} and Kim, {Seong Gyeom} and Choi, {Yeon Suk} and Haigun Lee",
year = "2017",
month = "9",
day = "1",
doi = "10.1007/s12540-017-7022-0",
language = "English",
volume = "23",
pages = "1050--1055",
journal = "Metals and Materials International",
issn = "1598-9623",
publisher = "Korean Institute of Metals and Materials",
number = "5",

}

TY - JOUR

T1 - Thermal and electrical properties of thermal-grease-insulated REBCO superconducting coils with respect to winding tension

AU - Song, Jung Bin

AU - Choi, Yoon Hyuck

AU - Yang, Dong Gyu

AU - Kim, Young Gyun

AU - Kim, Seong Gyeom

AU - Choi, Yeon Suk

AU - Lee, Haigun

PY - 2017/9/1

Y1 - 2017/9/1

N2 - This study investigates the thermal and electrical characteristics of a silicon-based grease insulation (GI) GdBCO coil with respect to the winding tension through charge, sudden discharge, and over-current tests. Charge and sudden discharge test results demonstrate that the charging/discharging delay time increases as the winding tension increases; this is because the characteristic resistance of the coil decreases due to the reduced contact resistance. The over-current test results confirm that the thermal/electrical stabilities of the GI coil are considerably enhanced with an increased winding tension resulting from improved thermal contact and the decrease in the electrical contact resistance between the turn-to-turn layers of the coil. Thus, as the winding tension increases, the charging/discharging rates decrease whereas the thermal/electrical stabilities improve. Overall, selecting the appropriate winding tension for a GI coil is critical for achieving thermal/electrical stabilities, as well as ameliorating the charging/discharging delay phenomenon generally observed in a no-insulation coil.

AB - This study investigates the thermal and electrical characteristics of a silicon-based grease insulation (GI) GdBCO coil with respect to the winding tension through charge, sudden discharge, and over-current tests. Charge and sudden discharge test results demonstrate that the charging/discharging delay time increases as the winding tension increases; this is because the characteristic resistance of the coil decreases due to the reduced contact resistance. The over-current test results confirm that the thermal/electrical stabilities of the GI coil are considerably enhanced with an increased winding tension resulting from improved thermal contact and the decrease in the electrical contact resistance between the turn-to-turn layers of the coil. Thus, as the winding tension increases, the charging/discharging rates decrease whereas the thermal/electrical stabilities improve. Overall, selecting the appropriate winding tension for a GI coil is critical for achieving thermal/electrical stabilities, as well as ameliorating the charging/discharging delay phenomenon generally observed in a no-insulation coil.

KW - electrical properties

KW - grease insulation

KW - superconductors

KW - thermal conductivity

KW - winding tension

UR - http://www.scopus.com/inward/record.url?scp=85029179553&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85029179553&partnerID=8YFLogxK

U2 - 10.1007/s12540-017-7022-0

DO - 10.1007/s12540-017-7022-0

M3 - Article

VL - 23

SP - 1050

EP - 1055

JO - Metals and Materials International

JF - Metals and Materials International

SN - 1598-9623

IS - 5

ER -