TY - JOUR
T1 - Design Study of 2-MW Fully Superconducting Synchronous Motors
AU - Fukuda, Shogo
AU - Yun, Kiwook
AU - Iwakuma, Masataka
AU - Miura, Shun
AU - Sato, Seiki
AU - Yoshida, Kohichi
AU - Tomioka, Akira
AU - Konno, Msayuki
AU - Izumi, Teruo
N1 - Funding Information:
In this study the AC-loss reduction technique is applied to the armature windings of fully superconducting motors. Experiments for verifying the applicability of the technique to the armature windings have been started under the support of ALCA Program of the Japan Science and Technology Agency (JST) [4]. At the same time, the design study of fully superconducting motors for various uses has also been started.
Funding Information:
Manuscript received September 15, 2017; accepted March 19, 2018. Date of publication April 2, 2018; date of current version April 24, 2018. This work was supported by the Advanced Low Carbon Technology Research and Development Program from the Ministry of Education, Culture, Sports, Science, and Technology, Japan. (Corresponding author: Shogo Fukuda.) S. Fukuda, K. Yun, M. Iwakuma, S. Miura, S. Sato, and K. Yoshida are with the Institute of Superconductos Science and Systems, Kyushu University, Fukuoka 819-0395, Japan (e-mail:, fukuda@sc.kyushu-u.ac.jp; iwakuma@sc.kyushu-u.ac.jp).
Publisher Copyright:
© 2002-2011 IEEE.
PY - 2018/6
Y1 - 2018/6
N2 - This study designed various 2-MW fully superconducting motors with the recently developed REBa2Cu3O7-δ (RE: Rare Earth, Y, Gd, Eu, REBCO) superconducting tapes to determine an optimum structure. The ac loss and critical current properties of the REBCO tapes were investigated and adopted in the design and analysis of the motor. The motors were designed by setting the operating temperature and the magnitude of magnetic field at the gap as parameters, and the properties of each motor were evaluated through numerical simulations with commercially available two-dimensional analysis software. Various factors, such as ac loss in the windings, efficiency, and the length of the required REBCO tapes, were evaluated, and the dependence of these factors on the operating temperature T, magnetic loading Bg, and diameter of motor D were analyzed. The ac loss induced in the armature windings could be reduced by our original technique, which involves scribing into a multifilamentary structure and special winding of the tapes. As a result, the motor could achieve an efficiency of 97.2% under optimum conditions, in which the REBCO tape is scribed into a 10-filament structure. Setting lower Bg and higher T is more favorable for enhancing efficiency, whereas the condition of lower Bg and T is more favorable for achieving compactness and lightness.
AB - This study designed various 2-MW fully superconducting motors with the recently developed REBa2Cu3O7-δ (RE: Rare Earth, Y, Gd, Eu, REBCO) superconducting tapes to determine an optimum structure. The ac loss and critical current properties of the REBCO tapes were investigated and adopted in the design and analysis of the motor. The motors were designed by setting the operating temperature and the magnitude of magnetic field at the gap as parameters, and the properties of each motor were evaluated through numerical simulations with commercially available two-dimensional analysis software. Various factors, such as ac loss in the windings, efficiency, and the length of the required REBCO tapes, were evaluated, and the dependence of these factors on the operating temperature T, magnetic loading Bg, and diameter of motor D were analyzed. The ac loss induced in the armature windings could be reduced by our original technique, which involves scribing into a multifilamentary structure and special winding of the tapes. As a result, the motor could achieve an efficiency of 97.2% under optimum conditions, in which the REBCO tape is scribed into a 10-filament structure. Setting lower Bg and higher T is more favorable for enhancing efficiency, whereas the condition of lower Bg and T is more favorable for achieving compactness and lightness.
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U2 - 10.1109/TASC.2018.2821718
DO - 10.1109/TASC.2018.2821718
M3 - Article
AN - SCOPUS:85044756707
SN - 1051-8223
VL - 28
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
IS - 4
M1 - 5207806
ER -