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Design, Fabrication, and Critical Current Testing of No-Insulation Superconducting Rotor Coils for NASA's 1.4 MW High-Efficiency Megawatt MotorNASA Glenn Research Center is developing a 1.4 MW high-efficiency electric machine for future electrified aircraft to reduce energy consumption, emissions, and noise. This wound-field, synchronous machine employs a self-cooled, superconducting rotor to achieve excellent specific power and efficiency. This paper discusses the design and fabrication of the no-insulation high temperature superconducting (HTS) rotor coils and compares them to conventionally insulated HTS coils. Two sub-scale test coils with epoxy on only one axial face were fabricated. Critical current testing of the coils at 77 K and self field was conducted to study the influence of thermal cycling on their critical current and n-value. After two or four aggressive thermal cycles between 77 K and about 278 K (5 degree C), the critical current and n-value were nearly unchanged, indicating very little to no degradation.
Document ID
20180005427
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
External Source(s)
Authors
Scheidler, Justin J.
(NASA Glenn Research Center Cleveland, OH, United States)
Tallerico, Thomas F.
(NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
September 21, 2018
Publication Date
July 9, 2018
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
GRC-E-DAA-TN57803
Meeting Information
Meeting: AIAA Propulsion & Energy
Location: Cincinnati, OH
Country: United States
Start Date: July 9, 2018
End Date: July 11, 2018
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
WBS: WBS 081876.02.03.05.02.02
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Keywords
electric aircraft propulsion
superconductors
electric machines
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