Persistent Current Mode Operation of A 2G HTS Coil With A Flux Pump

• Published in: IEEE transactions on applied superconductivity Vol. 26; no. 4; pp. 1 - 4
• Main Authors: Lee, Seyeon, Kim, Woo-Seok, Kim, Yungil, Lee, Ji-Yung, Park, Sang-Ho, Lee, Ji-Kwang, Hong, Gye-Won, Kim, Sungsoo, Han, Jinho, Hwang, Young Jin, Choi, Kyeongdal
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-06-2016; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Activation; Coiling; Coils (windings); Conductors; Cooling; Cryopumping; Discharge; Flux Pump; Flux pumps; High-temperature superconductors; HTS magnet; Joint-less coil; Magnetic fields; Magnetic flux; Persistent Current; Persistent currents; Stators; Superconducting magnets; Wind-and-flip; Winding; joint-less coil; Flux pump; persistent current; wind-and-flip; HTS magnet
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2016.2524519

A flux pump is a kind of power source that energizes superconducting magnets usually embedded in the cryogenic system. Therefore, heat loss through current leads is eliminated, allowing for more efficient cooling design. A winding technique, the so-called "wind-and-flip," had been proposed by the authors to realize a jointless HTS coil for a perfect resistanceless closed loop, which may enable to induce a persistent current in an HTS coil wound with second-generation HTS tape. In this paper, we investigated charging/discharging characteristics and a possibility of persistent current operation of a jointless HTS coil with a flux pump. Results are discussed with regard to current capacity and temporal stability with a prototype jointless HTS coil.