Experimental Evaluation of 1 kW-class Prototype REBCO Fully Superconducting Synchronous Motor Cooled by Subcooled Liquid Nitrogen for E-Aircraft

For the development of electric propulsion aircrafts with light weight, low emission and high efficiency, MW-class fully superconducting synchronous machines operating at liquid nitrogen temperature were conceptually designed with REBa 2 Cu 3 O 7- δ (REBCO) superconducting tapes in our previous stud...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2021-08, Vol.31 (5), p.1-6
Main Authors: Sasa, Hiromasa, Iwakuma, Masataka, Yoshida, Koichi, Sato, Seiki, Sasayama, Teruyoshi, Yoshida, Takashi, Yamamoto, Kaoru, Miura, Shun, Kawagoe, Akifumi, Izumi, Teruo, Tomioka, Akira, Konno, Masayuki, Sasamori, Yuichiro, Honda, Hirokazu, Hase, Yoshiji, Syutoh, Masao, Lee, Sergey, Hasuo, Shinya, Nakamura, Miyuki, Hasegawa, Takayo, Aoki, Yuhji, Umeno, Takahiro
Format: Article
Language:English
Subjects:
Aircraft
Coils (windings)
Cooling
electric aircraft
Electric propulsion
Fully-superconducting motor
Liquid nitrogen
Nitrogen
Prototypes
REBCO
subcooled liquid nitrogen
Superconducting tapes
Superconductivity
Synchronous machines
Synchronous motors
Thermal insulation
Weight reduction
Windings
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Summary:For the development of electric propulsion aircrafts with light weight, low emission and high efficiency, MW-class fully superconducting synchronous machines operating at liquid nitrogen temperature were conceptually designed with REBa 2 Cu 3 O 7- δ (REBCO) superconducting tapes in our previous studies. To verify the actualization of the structure and cooling method, a 1 kW-class prototype fully superconducting synchronous motor was designed and constructed in this study. The fixed armature was cooled with subcooled liquid nitrogen at 65 K. The rotor was cooled with helium gas. The pole number was two for the future high speed operation. The applicability of the complicated casing structure with three chambers into fully superconducting motor was also investigated from the viewpoint of thermal insulation. The operations as a motor up to 500 rpm and a generator demonstrated that the designed structure and cooling method were reasonable and effective for cooling the fixed armature and rotating field windings.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2021.3055452