Experimental Analysis of Flux Pump for Compensating Current Decay in the Persistent Current Mode Using HTS Magnet

Author

Jo, Hyun Chul ; Yang, Seong Eun ; Kim, Young Jae ; Chang, Ki Sung ; Jang, Jae Young ; Yoon, Yong Soo ; Chung, Yoon Do ; Kim, Ho Min ; Ko, Tae Kuk

Author_Institution

Sch. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea

Volume

20

Issue

3

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

1693

Lastpage

1696

Abstract

The current decay of High temperature superconducting (HTS) magnet is larger than that of low temperature superconducting (LTS) magnet due to its lower n-value and higher joint resistance. To compensate the current decay in HTS magnet, various power supplies have been required. From this reason, as an option of power supply for HTS magnet, we have proposed a flux pump with heater trigger switch. In this paper, a performance and experimental analysis on a transformer type flux pump were presented. Characteristics of pumping rates with respect to change in the temperature and sequential timing of the heater-triggered switch were investigated. As well as, the pumping rates were carried out in the charging mode. Furthermore, the compensating actions were carried out in the persistent current mode using a feedback control unit.

Keywords

Meissner effect; bismuth compounds; critical current density (superconductivity); high-temperature superconductors; magnetic flux; strontium compounds; superconducting coils; superconducting magnets; type II superconductors; Bi-2223 double-pancake magnet; BiSrCaCuO; compensating current decay; critical current density; flux pump; high temperature superconducting magnet; superconducting coil; Compensating mode; HTS magnet; current decay; flux pump; persistent current mode;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2010.2040474

Filename

5439743