Effects of Impregnating Materials on Thermal and Electrical Stabilities of the HTS Racetrack Pancake Coils Without Turn-to-Turn Insulation
- Authors
- Shin, Hyun-Jin; Kim, Kwang Lok; Choi, Yoon Hyuck; Kwon, Oh Jun; Hahn, Seungyong; Iwasa, Yukikazu; Lee, Haigun G.
- Issue Date
- 6월-2013
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Coil impregnation; CTD-521; GdBCO racetrack coil; paraffin; Stycast 2850 FT
- Citation
- IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, v.23, no.3
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
- Volume
- 23
- Number
- 3
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/103114
- DOI
- 10.1109/TASC.2012.2234179
- ISSN
- 1051-8223
- Abstract
- A high temperature superconducting (HTS) coil without turn-to-turn insulation is proposed for the field coil of a wind turbine. In the case of the field coil, epoxy impregnation is generally necessary to protect the coil from mechanical disturbances by time-varying magnetic fields and rotational vibrations to provide high mechanical integrity. This study examined the thermal and electrical stabilities of non-insulated GdBCO racetrack pancake coils impregnated with CTD-521, Stycast 2850 FT, and paraffin through cool down, over-current, and repetitive cooling tests. Among the three epoxy impregnated coils, the Stycast 2850 FT-impregnated coil exhibited the best thermal and electrical stabilities during over-current testing. In repetitive cooling conditions, the CTD-521-impregnated coil exhibited less degradation of its superconducting property due to the well-matching of the thermal contraction between the GdBCO racetrack pancake coil and the epoxy.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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