Title :
Design, fabrication and testing of a high-Tc superconducting power supply with the Bi-2223 load
Author :
Kim, Ho Min ; Yoon, Yong Soo ; Ahn, Min Cheol ; Ko, Tae Kuk ; Lee, Sang-Jin ; Han, Tae-Su
Author_Institution :
Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea
fDate :
3/1/2002 12:00:00 AM
Abstract :
This paper presents the design and fabrication of a high-Tc superconducting (HTS) power supply. Its characteristics have been analyzed through experiments. A HTS power supply consists of two heaters, an electromagnet, and a Bi-2223 solenoid and a Bi-2223 pancake load. The timing sequential control of two heaters and an electromagnet is an important factor to generate pumping-current in the Bi-2223 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 331 mH electromagnet and the 0.8 A DC heater current were optimally derived, and 8.5 sec and 17 sec for the pumping period were selected in this experiment. In the experiment, the maximum pumping current reached 1.7 A.
Keywords :
bismuth compounds; calcium compounds; high-temperature superconductors; power supplies to apparatus; strontium compounds; superconducting magnets; testing; thermal analysis; 0.8 A; 1.7 A; 8.5 sec; Bi-2223 load; Bi2Sr2Ca2Cu3O; DC heater current; electromagnet; heater input; heaters; high-Tc superconducting power supply; pancake load; pumping-current; solenoid; switching parts; thermal analysis; timing sequential control; Electromagnetic heating; Electromagnets; Fabrication; Heat pumps; High temperature superconductors; Power supplies; Solenoids; Temperature control; Testing; Timing;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2002.1018531
