Browse

A Study on the Electrical Contact Resistance and Thermal Conductivity of Soldered-Metal Insulation Coil With Conduction Cooling

Cited 0 time in Web of Science Cited 0 time in Scopus
Issue Date
2022-09
Publisher
Institute of Electrical and Electronics Engineers
Citation
IEEE Transactions on Applied Superconductivity, Vol.32 No.6, p. 4604805
Abstract
The no-insulation (NI) winding method has been widely used in the fabrication of superconducting coils owing to its excellent thermal stability and mechanical stiffness. In the NI coil, there is a charging delay and heat loss due to leakage current. Therefore, the metal insulated (MI) winding method was proposed to reduce the charging delay and the heat loss due to the leakage current and the increased contact resistance by the metal tape. However, it is difficult to quantify the contact resistance between the turns of the coil during the design stage. To resolve this problem, a new winding method, called soldered metal insulation (SMI), was proposed by the authors, and the electrical properties were evaluated in a bath of liquid nitrogen. As a follow-up to the previous research, experimental investigations were conducted in a conduction cooling test apparatus to investigate the electrical and thermal characteristics of the SMI coil below 77 K. The electric contact resistances were evaluated through sudden discharge experiments. Then, the thermal contact resistances were measured using a heater installed on the outer turn of the coil. It is believed that the SMI winding technique can be applied to fabricate rare-earth barium copper oxide (REBCO) coils with predictable electrical and thermal contact resistances.
ISSN
1051-8223
URI
https://hdl.handle.net/10371/184292
Files in This Item:
There are no files associated with this item.
Appears in Collections:
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Electrical and Computer Engineering (전기·정보공학부)Journal Papers (저널논문_전기·정보공학부)
  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse