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System considerations for airborne, high power superconducting generators

By: Southall, H.; Oberly, C.;

1979 / IEEE


This item was taken from the IEEE Periodical ' System considerations for airborne, high power superconducting generators ' The design of rotating superconducting field windings in high power generators is greatly influenced by system considerations. Experience with two superconducting generators designed to produce 5 and 20 Megawatts has resulted in a number of design restrictions. The design restrictions imposed by system considerations have not prevented low weight and high voltage power generation capability. The application of multifilament Nb3Sn has permitted a large thermal margin to be designed into the rotating field winding. This margin permits the field winding to remain superconducting under severe system operational requirements. System considerations include: fast rotational start-up, fast ramped magnetic fields, load induced transient fields and airborne cryogen logistics. Preliminary selection of a multifilament Nb3Sn cable has resulted from these considerations. The cable will carry 864 amperes at 8.5K and 6.8 Tesla.