TY - JOUR
T1 - AC loss properties of laser-scribed multi-filamentary GdBCO coated conductors with artificial pinning centres
AU - Hayashia, Takuya
AU - Nakamura, Sosuke
AU - Iwakuma, Masataka
AU - Funaki, Kazuo
AU - Ibi, Akira
AU - Yamada, Yutaka
AU - Izumi, Teruo
AU - Shiohara, Yuh
AU - Saitoh, Takashi
AU - Iijima, Yasuhiro
N1 - Funding Information:
This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) as Technological Development of Yttr ium-based Superconducting Power Equipment.
Publisher Copyright:
©2012 Published by Elsevier B.V. Selection and/or peer-review under responsibility of the Guest Editors.
PY - 2012
Y1 - 2012
N2 - RE1Ba2Cu3O7-∂ (RE: Rare Earth, Gd, Y and so on) coated conductors have a large aspect ratio and also anisotropy in critical current density. For practical application of REBCO tapes, we evaluated JC and ac loss properties in a wide range of temperature and magnetic field. The induced ac losses due to the perpendicular magnetic field to a tape face are considerably huge. Therefore, in case that REBCO coated conductors are applied electric power machines and devices, ac loss induced in the windings should amount to a great part of the total heat load. We proposed an ac loss reduction method, which is combined with a laser scribing technique and a special winding process into a multifilamentary structure. Additionally, we are trying to enhance critical current density JC, by doping artificial pinning centre. In this study we investigated the ac loss properties of multi-filament structural GdBCO tapes with BZO nanolods as artificial pinning centers. We measured ac losses of 5, 10, 20-filament GdBCO tapes by using a saddle-shaped pickup coil. Consequently we confirmed the ac loss decreased in inverse proportion to the number of filaments even in the GdBCO tapes with enhanced JC by introducing artificial pinning centers.
AB - RE1Ba2Cu3O7-∂ (RE: Rare Earth, Gd, Y and so on) coated conductors have a large aspect ratio and also anisotropy in critical current density. For practical application of REBCO tapes, we evaluated JC and ac loss properties in a wide range of temperature and magnetic field. The induced ac losses due to the perpendicular magnetic field to a tape face are considerably huge. Therefore, in case that REBCO coated conductors are applied electric power machines and devices, ac loss induced in the windings should amount to a great part of the total heat load. We proposed an ac loss reduction method, which is combined with a laser scribing technique and a special winding process into a multifilamentary structure. Additionally, we are trying to enhance critical current density JC, by doping artificial pinning centre. In this study we investigated the ac loss properties of multi-filament structural GdBCO tapes with BZO nanolods as artificial pinning centers. We measured ac losses of 5, 10, 20-filament GdBCO tapes by using a saddle-shaped pickup coil. Consequently we confirmed the ac loss decreased in inverse proportion to the number of filaments even in the GdBCO tapes with enhanced JC by introducing artificial pinning centers.
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U2 - 10.1016/j.phpro.2012.06.204
DO - 10.1016/j.phpro.2012.06.204
M3 - Conference article
AN - SCOPUS:84923290555
VL - 36
SP - 1522
EP - 1527
JO - Physics Procedia
JF - Physics Procedia
SN - 1875-3892
T2 - Superconductivity Centennial Conference, SCC 2011
Y2 - 18 September 2011 through 23 September 2011
ER -