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

Sasa, Hiromasa; Iwakuma, Masataka; Yoshida, Kôichi; Sato, Saburo; Sasayama, Teruyoshi; Yonetani, Takashi; Yamamoto, Kazuya; Miura, Shun; Kawagoe, A.; Izumi, Teruo; Tomioka, Akihiro; Konno, Masayuki; Sasamori, Yuichiro; Honda, Hirokazu; Hase, Yoshiji; Syutoh, Masao; Lee, Sergey; Hasuo, S.; Nakamura, Miyuki; Hasegawa, Takeshi; Aoki, Yukio; Umeno, Takatoshi

doi:10.1109/tasc.2021.3055452

Cited by 30 publications

(7 citation statements)

References 9 publications

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“…Based on the requirements of the application environment., other coolants h been applied. Sasa et al [54] studied a 1 kW high-speed motor cooled using passin nitrogen. This is a motor used for low-temperature superconductivity to increas Based on the requirements of the application environment., other coolants have also been applied.…”

Section: Common Cooling Methods and Coolantsmentioning

confidence: 99%

Research Progress of Enhanced Thermal Evacuation and Cooling Technology for High-Speed Motors

Yan,

Qiang,

Zhao

et al. 2024

Applied Sciences

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In high-speed motors, there is a huge amount of heat generation from core and winding losses, which may result in thermal failures or motor performance deterioration. In the prevention of heat accumulation, efficient cooling technology is critical for smooth and reliable motor movement. This paper summarizes the diverse application of high-speed motor and thermal requirements, such as in electrical devices, turbo-machinery, and high-precision machine tools. Three paths of case convection—cooling, internal ventilation cooling and spindle core cooling—are analyzed. Methods for configuring thermal resistance and improving cooling efficiency are summarized. Among them, coolant flow characteristics and flow channel shapes, gas supply ventilation systems, and methods to reduce air resistance, as well as axial cooling and integrated heat pipe structures, are extensively investigated. Finally, the development prospects of high-speed motor cooling are also forecasted. At present, the primary research directions are to reduce the heat generated by the heat source, utilize the latent heat of the coolant, optimize the cooling flow path of the shell, design an axial air-cooling circulation system, and enhance the heat dissipation of the spindle.

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Section: Common Cooling Methods and Coolantsmentioning

confidence: 99%

Research Progress of Enhanced Thermal Evacuation and Cooling Technology for High-Speed Motors

Yan,

Qiang,

Zhao

et al. 2024

Applied Sciences

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“…One of the essential operational characteristics of electric aircraft machines is reliability [6][7][8][9][10]. A fully superconducting electrical machine based on the second generation HTS tapes [11,12], Engineering created at the moment in the world, did not pass the service life tests.…”

Section: Methodsmentioning

confidence: 99%

Development of fully superconducting 5 MW aviation generator with liquid hydrogen cooling

Dezhin

Ilyasov

2022

Eureka: PE

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The use of liquid hydrogen as a fuel will be inevitable in the aviation of the future. This statement means that manufacturers will also implement liquid hydrogen for cooling all superconducting aviation equipment of an electric propulsion system. The development of fully electric aircraft is the most promising solution in this case. Scientists from the Department of electrical machines and power electronics of Moscow aviation institute have conducted calculations and theoretical researches of critical specific mass-dimensional parameters (MW/ton and MW/m3 at 21 K) of fully superconducting aviation synchronous generator of the electric propulsion system. The results are in this article. The article discusses the results 3D finite element modeling (FEM) simulation of a 5 MW fully superconducting synchronous generator with combined excitation. Superconducting armature and axial excitation windings based on second generation high temperature superconductors (HTS-2G) are located on the stator, which makes it possible to contactlessness and the absence of sliding seals. A dry gap will reduce gas-dynamic losses and increase the nominal peripheral speed of the rotor. The use of liquid hydrogen as a coolant makes it possible to significantly increase the linear load of the generator, and high current densities to reduce the cross-sectional area of the coils, which will make it possible to place them in individual cryostats in the future. Individual cryostats will allow to remove the heat release of magnetic losses from the cryogenic zone and reduce the consumption of refrigerant. For the purpose of internal redundancy of the HTS coils, the machine has a complete set of reserve winding made of ultrapure aluminum, also cooled by liquid hydrogen. If the superconducting coils get out of the stand, the generator will provide 15 % power on standby

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“…希土類系高温超電導線材 (REBa2Cu3O7-δ, RE：Y, Gd 等の希土類。以下「REBCO 線材」と略記)は、現状最も優れた超電導特性(高温、高磁場下で、高い臨界電流を維持) と高機械強度(引張応力)を有していることから、30 T を超える超高磁場コイル [1][2][3][4] をはじめ、医療用 MRI 5,6) や医療用加速器 [7][8][9] 、或いは、Compact 核融合用コイル 10) 、さらに舶用や航空機用電動機への応用 11) などを目指した研究開発が国内外で進められ、最近では 1.2 GHz (28.…”

Section: はじめにunclassified

Basics of Protection Technology for REBCO Coils ―with a Comparison to Low-Temperature Superconducting Coils―

Ishiyama

2022

TEION KOGAKU

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The REBa2Cu3O7-δ (REBCO) coated conductor has the best superconducting properties (high critical current at high temperatures and high magnetic fields) and high mechanical strength (tensile stress). Recently, a 1.2GHz (28.2T) NMR system has become commercially available. On the other hand, however, design and manufacturing technologies for REBCO coil systems that combine robustness, safety, reliability, economy, and convenience as industrial products while maximizing the excellent properties of REBCO coated conductor have not yet been established. Therefore, in this paper, with the aim of establishing stabilization and protection technologies suitable for REBCO coil systems, with comparisons to low-temperature superconducting coils, the author discusses the occurrence of normal state transition, especially degradation and defects, and normal zone propagation characteristics, quench detection and coil protection methods. The author will also attempt to summarize the current status of the methods for monitoring the health of coils.

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

Cited by 30 publications

References 9 publications

Research Progress of Enhanced Thermal Evacuation and Cooling Technology for High-Speed Motors

Research Progress of Enhanced Thermal Evacuation and Cooling Technology for High-Speed Motors

Development of fully superconducting 5 MW aviation generator with liquid hydrogen cooling

Basics of Protection Technology for REBCO Coils ―with a Comparison to Low-Temperature Superconducting Coils―

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