TY - JOUR
T1 - Effect of partial insulation winding scheme on discharge characteristics of GdBCO coils
AU - Yang, D. G.
AU - Choi, Y. H.
AU - Kang, D. H.
AU - Park, Y. J.
AU - Lee, H. G.
N1 - Funding Information:
This work was supported by the KETEP grant from the International Collaborative R&D Program, funded by the Korean government MKE ( 20118520020020 )
Publisher Copyright:
© 2014 Elsevier B.V.
Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2015/2
Y1 - 2015/2
N2 - In this study, sudden discharge tests were performed on partially-insulated (PI) GdBCO coated conductor single-pancake coils to investigate the effects of a PI winding scheme on the discharge characteristics. Three sets of PI coils were constructed with insulation at 3 different intervals: every 2nd, 4th, and 8th turn. Each set included coils with 4 different insulation-angles: 90°, 180°, 270°, and 360°. Discharge delay of the PI coils was alleviated by increasing the insulation-interval or insulation-angle due to increased insulated area, which partially hinders radial current flow. The results of the sudden discharge test were in fairly good agreement with simulations of the PI coils using an equivalent circuit model consisting of a single RL circuit in parallel. The characteristic resistance of the PI coils was reasonably estimated through the numerical approach with contact surface resistance and compensation for the current-bottleneck effect, which enables the PI coils to be utilized in practical superconducting magnet applications.
AB - In this study, sudden discharge tests were performed on partially-insulated (PI) GdBCO coated conductor single-pancake coils to investigate the effects of a PI winding scheme on the discharge characteristics. Three sets of PI coils were constructed with insulation at 3 different intervals: every 2nd, 4th, and 8th turn. Each set included coils with 4 different insulation-angles: 90°, 180°, 270°, and 360°. Discharge delay of the PI coils was alleviated by increasing the insulation-interval or insulation-angle due to increased insulated area, which partially hinders radial current flow. The results of the sudden discharge test were in fairly good agreement with simulations of the PI coils using an equivalent circuit model consisting of a single RL circuit in parallel. The characteristic resistance of the PI coils was reasonably estimated through the numerical approach with contact surface resistance and compensation for the current-bottleneck effect, which enables the PI coils to be utilized in practical superconducting magnet applications.
KW - Characteritic resistance
KW - Discharge characteristic
KW - Insulation-angle
KW - Insulation-interval
KW - Partial insulation
UR - http://www.scopus.com/inward/record.url?scp=84918556053&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84918556053&partnerID=8YFLogxK
U2 - 10.1016/j.cap.2014.11.010
DO - 10.1016/j.cap.2014.11.010
M3 - Article
AN - SCOPUS:84918556053
SN - 1567-1739
VL - 15
SP - 156
EP - 162
JO - Current Applied Physics
JF - Current Applied Physics
IS - 2
ER -