TY - JOUR
T1 - AC loss distribution in two-layer HTS cable
AU - Ogawa, Jun
AU - Fukui, Satoshi
AU - Oka, Tetsuo
AU - Ogawa, Tomoya
AU - Sugai, Mamoru
N1 - Funding Information:
Manuscript received August 28, 2017; accepted November 18, 2017. Date of publication November 23, 2017; date of current version December 6, 2017. This work was supported by the JSPS Grants-in-Aid for Scientific Research (C) under Grant 16K06212. (Corresponding author: Jun Ogawa.) The authors are with the Graduate School of Science and Technology, Niigata University, Niigata 950-2181, Japan (e-mail: ogawa@eng.niigata-u.ac.jp). Digital Object Identifier 10.1109/TASC.2017.2776923
Publisher Copyright:
© 2017 IEEE.
PY - 2018/4
Y1 - 2018/4
N2 - We measured the influence of the twist pitch, twist direction, and transport current balance of the inner and outer layers on the ac loss characteristics in a two-layer twisted high temperature superconducting (HTS) cable. To measure the ac loss in each layer, we placed the thermo-couples on each tape face with thermal insulation. In the HTS cable, the inner layer is exposed to a longitudinal magnetic field generated by the twisted outer layer, and the outer layer is exposed to a circumferential direction magnetic field generated by the inner layer. When the inner and outer layers connect in series, the ac loss characteristics in the inner layer exhibit the influence of the outer layer arrangement. When the transport current balance of the inner and outer layer changes, the lowest loss condition exists when the inner transport current exceeds the outer transport current. These phenomena are possible explanations for the amplitude and direction of the magnetic field in each layer.
AB - We measured the influence of the twist pitch, twist direction, and transport current balance of the inner and outer layers on the ac loss characteristics in a two-layer twisted high temperature superconducting (HTS) cable. To measure the ac loss in each layer, we placed the thermo-couples on each tape face with thermal insulation. In the HTS cable, the inner layer is exposed to a longitudinal magnetic field generated by the twisted outer layer, and the outer layer is exposed to a circumferential direction magnetic field generated by the inner layer. When the inner and outer layers connect in series, the ac loss characteristics in the inner layer exhibit the influence of the outer layer arrangement. When the transport current balance of the inner and outer layer changes, the lowest loss condition exists when the inner transport current exceeds the outer transport current. These phenomena are possible explanations for the amplitude and direction of the magnetic field in each layer.
KW - AC loss
KW - HTS cable
KW - Transport current balance
KW - Twist direction
KW - Twist pitch
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U2 - 10.1109/TASC.2017.2776923
DO - 10.1109/TASC.2017.2776923
M3 - Article
AN - SCOPUS:85035777682
SN - 1051-8223
VL - 28
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 3
M1 - 5900104
ER -