Conceptual Design and Numerical Analysis of 10 MW Fully Superconducting Synchronous Generators Installed With a Novel Casing Structure

Currently, feasibility studies on fully turboelectric propulsion systems for electric aircrafts are being conducted worldwide. A fully superconducting rotating machine can realize fully turboelectric propulsion systems with light weight and high power density. In the simple casing model considered i...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2020-06, Vol.30 (4), p.1-7
Main Authors: Komiya, Masataka, Sugouchi, Ryota, Sasa, Hiromasa, Miura, Shun, Iwakuma, Masataka, Yoshida, Takashi, Sasayama, Teruyoshi, Yamamoto, Kaoru, Tomioka, Akira, Konno, Masayuki, Izumi, Teruo
Format: Article
Language:English
Subjects:
Atmospheric modeling
Conceptual design
Efficiency
Electric aircraft
Feasibility studies
Fully superconducting generator
Gas temperature
Generators
Mathematical model
Numerical analysis
Propulsion systems
REBCO
Refrigerants
Rotating machinery
Rotating machines
Rotors
scribing
Superconductivity
Thermal analysis
Weight reduction
Winding
Windings
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Currently, feasibility studies on fully turboelectric propulsion systems for electric aircrafts are being conducted worldwide. A fully superconducting rotating machine can realize fully turboelectric propulsion systems with light weight and high power density. In the simple casing model considered in a previous study, the field winding forms a large percentage of the generator weight. Therefore, to reveal the relationship between the operation temperature of the field winding and output power density, we compared an inner cryostat model having a field winding operation temperature of 20 K with the simple casing model having a field winding operation temperature of 64 K in terms of the output power density, efficiency, and increasing temperature. The stator and rotor rooms of the inner cryostat model were insulated by introducing the vacuum layer. The inner cryostat casing structure can have a lower refrigerant gas temperature, e.g., 20 K. Consequently, the temperature of the simple model increased from 5.4 to 7.1 K and that of the inner cryostat model increased from 3.0 to 6.1 K. The simple and inner cryostat models' power densities were 18.8 and 21.7 kW/kg, respectively. Both models achieved 99% efficiency. No major difference was observed between both models in terms of efficiency and output power density.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2020.2989746