This paper presents experimental results and characteristic analysis of a high-Tc heater-triggered switch using a coated conductor (CC) in various low operational temperatures. A high temperature superconducting (HTS) power supply has been studied only focusing on proving the operational concept rather than applying to real superconducting magnet load. A HTS insert coil that can be installed in a low temperature superconducting (LTS) magnet has been proposed and researched to generate higher magnetic field for NMR. Since the CC could be an attractive option for the HTS insert coil, it is important to research about characteristics of the heater-triggered switch employing the CC in the low temperature. The HTS power supply consists of the two switches and one of key design parameters is to make a timing sequential chart. We investigated a quench and recovery time of the switch with respect to a heater current. A heater test in a gas helium condition was also performed and compared with the result in a liquid helium condition. From these tests, a basic data of the heater-triggered switch for optimal design of the HTS power supply was obtained; correlations among the heater current, a state and temperature of cryogen, and the quench and recovery time.
Bibliographical noteFunding Information:
Manuscript received August 26, 2008. First published June 05, 2009; current version published July 15, 2009. This work was supported by the Korea Science and Engineering Foundation (KOSEF) through the National Research Lab. Program funded by the Ministry of Science and Technology (R0A-2007-000-20063-0). Y. J. Kim, S. E. Yang, K. S. Chang, D. K. Park and T. K. Ko are with the School of Electrical and Electronics, Yonsei University, Korea (e-mail: firstname.lastname@example.org). H. M. Kim is with the Korea Electrotechnology Research Institute, Korea (e-mail: email@example.com). Y. S. Yoon is with the Ansan College of Technology, Korea (e-mail: firstname.lastname@example.org). J. B. Song and H. Lee are with the Department of Materials Science & Engineering, Korea University, Korea (e-mail: email@example.com). Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/TASC.2009.2018761
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering