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.
| Original language | English |
|---|---|
| Article number | 7700404 |
| Journal | IEEE Transactions on Applied Superconductivity |
| Volume | 23 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2013 Feb 8 |
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Keywords
- Coil impregnation
- CTD-521
- GdBCO racetrack coil
- paraffin
- Stycast 2850 FT
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
Cite this
Effects of impregnating materials on thermal and electrical stabilities of the hts racetrack pancake coils without turn-to-turn insulation. / Shin, Hyun Jin; Kim, Kwang Lok; Choi, Yoon Hyuck; Kwon, Oh Jun; Hahn, Seungyong; Iwasa, Yukikazu; Lee, Haigun.
In: IEEE Transactions on Applied Superconductivity, Vol. 23, No. 3, 7700404, 08.02.2013.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effects of impregnating materials on thermal and electrical stabilities of the hts racetrack pancake coils without turn-to-turn insulation
AU - Shin, Hyun Jin
AU - Kim, Kwang Lok
AU - Choi, Yoon Hyuck
AU - Kwon, Oh Jun
AU - Hahn, Seungyong
AU - Iwasa, Yukikazu
AU - Lee, Haigun
PY - 2013/2/8
Y1 - 2013/2/8
N2 - 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.
AB - 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.
KW - Coil impregnation
KW - CTD-521
KW - GdBCO racetrack coil
KW - paraffin
KW - Stycast 2850 FT
UR - http://www.scopus.com/inward/record.url?scp=84873308670&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84873308670&partnerID=8YFLogxK
U2 - 10.1109/TASC.2012.2234179
DO - 10.1109/TASC.2012.2234179
M3 - Article
AN - SCOPUS:84873308670
VL - 23
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 3
M1 - 7700404
ER -