Determination of heater triggering parameters of superconducting power supply with series-connected double-pancake load

Author

Kim, Yeong Sik ; Yoon, Yong Soo ; Kim, Min Cheol ; Bae, Duck Kweon ; Ahn, Min Cheol ; Cheon, Woo Yong ; Ko, Tae Kuk

Author_Institution

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

Volume

14

Issue

2

fYear

2004

fDate

6/1/2004 12:00:00 AM

Firstpage

650

Lastpage

653

Abstract

This paper presents determination of heater triggering parameters of high-T_c superconducting (HTS) power supply with series-connected double-pancake load, as well as analysis of its characteristics as determined through experiments. A HTS power supply consists of two heaters, an electromagnet, a Bi-2223 solenoid, and a Bi-2223 series-connected double-pancake load of 6.0 mH. The timing sequential control of two heaters and an electromagnet is an important factor to generate pumping-current in the pancake load. The thermal analysis of switching parts of the Bi-2223 solenoid according to the heater input was carried out. Based upon the analysis, the 8 A electromagnet current and the 1.5 A dc heater current were optimally derived, and 8 s and 20 s for the pumping period were selected in this experiment. In the experiment, the maximum pumping current reached about 24 A.

Keywords

bismuth compounds; calcium compounds; high-temperature superconductors; power supplies to apparatus; solenoids; strontium compounds; superconducting coils; superconducting machines; superconducting magnets; thermal analysis; 1.5 A; 20 s; 24 A; 8 A; 8 s; Bi2223 solenoid; Bi₂Sr₂Ca₂Cu₃O₁₀; HTS power supply; dc heater current; electromagnet current; heater triggering parameters; high-T_c superconducting; pumping-current generation; series-connected double-pancake load; superconducting power supply; switching parts; thermal analysis; timing sequential control; Electromagnetic heating; Electromagnets; Heat pumps; High temperature superconductors; Magnetic devices; Magnetic levitation; Power supplies; Solenoids; Superconducting magnets; Temperature control; HTS power supply; pumping-current; series-connected double-pancake load;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2004.830017

Filename

1324877