This paper describes the characteristics analysis of a high-Tc superconducting (HTSC) power supply considering flux creep effect, and also presents its operational characteristics through experiments. The power supply can be employed to charge an HTSC magnet. An HTSC power supply consists of two heaters, an electromagnet, a Bi-2223 solenoid, and a series-connected Bi-2223 pancake load. The pancake load was fabricated by connecting four double pancake coils in series. In the experiments, two cases of the pumping period, which correspond to 8.5 and 17 s, were used with an electromagnet of 331 mH and a dc heater current of 0.8 A. A region of the superconducting tape with a buried heating coil can be switched by means of its temperature change. In order to measure the pumping-current with respect to the magnet flux changes, a hall sensor was installed at the center of the Bi-2223 pancake load. The experimental observations have been compared with the theoretical predictions. In this experiment, the pumping-current has reached about 22.9 A.
Bibliographical noteFunding Information:
Manuscript received June 8, 2005; revised December 28, 2005. This paper was recommended by Associate Editor W. S. Schwenterly. This work was supported by KESRI (R-2005-B-113), which was funded by the Ministry of Commerce, Industry, and Energy (MOCIE). Y. S. Yoon is with the Electrical Engineering Department, Ansan College of Technology, Danwon-Gu, Ansan 425-792, Korea (e-mail: firstname.lastname@example.org). H. M. Kim is with the LS Industrial System Co. Ltd., Chungju 361-720, Korea (e-mail: email@example.com). M. Joo, M. C. Ahn, and T. K. Ko are with the Electrical and Electronic Engineering Department, Yonsei University, Seodaemoon-Gu, Seoul 120-749, Korea (e-mail: firstname.lastname@example.org). D. K. Bae is with the Korea Institute of Machinery and Materials, Yuseong-gu, Daejeon 305-343, Korea (e-mail: email@example.com). Digital Object Identifier 10.1109/TASC.2006.873997
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering