DTIC ADA072093: Program for the Development of pdf

DTIC ADA072093: Program for the Development of

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This report summarizes work completed in Phase II and Phase III of a Program for the Development of a Superconducting Generator. A 5MW, 400 Hz, 12000 rpm generator was designed and built during Phase II. The oil cooled stator contained a 3-phase, wye connected, 5 kV, flooded winding within a laminated iron shield. The rotor contained a winding of 0.094 cm x 0.14 cm wire with 438 36 micrometers filaments of Nb-Ti superconducting alloy. A rotating dewar with a cold electro-thermal shield was used. The Phase III work consisted of a warm spin-up of the generator to design speed followed by cool-downs of the rotor. A superconducting state was not obtained in a generator configuration due to high pressure in the vacuum space which resulted in excessive gas conduction into the field winding compartment. A continuous pump-down system was incorporated into the test set-up but the helium leakage rate exceeded the capability of this system.

Partial disassembly of the rotor was performed to define the areas of leakage. Further disassembly and work is required to correct this problem. (Author

• Creator/s: Defense Technical Information Center
• Date: 2/1/1979
• Year: 1979
• Book Topics/Themes: DTIC Archive, McCabria, J L, WESTINGHOUSE ELECTRIC CORP LIMA OHIO AEROSPACE ELECTRICAL DIV, *SUPERCONDUCTORS, *ALTERNATORS, AVIONICS, HIGH POWER, COILS, VACUUM APPARATUS, NIOBIUM, TURBINES, TITANIUM, AIRCRAFT EQUIPMENT, HELIUM, ROTORS, ELECTRIC GENERATORS, CRYOGENICS, OIL COOLERS, DEGASIFICATION, ULTRALOW FREQUENCY

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