General Electric Company

Electric Power Research Institute Incorporated

Swarn S Kalsi

Madabushi V Chari

An auxiliary field winding for a superconductive AC electrical machine. The auxiliary field winding is adapted to provide a controlled and rapidly varying magnetic field to an armature winding in addition to that produced by the main field winding for improving the dynamic stability of the machine. The main field winding is superconductive and is adapted to provide a substantially steady-state magnetic field to the armature. The two windings permit the machine to rapidly accommodate changes in the load made on the machine during operation.

Auxiliary field winding for a superconductive alternating current

A high speed inductor alternator employs axial air gaps, enabling a nonmagnetic filler in the portion of the gap extending into the solid rotor to be securely bonded to the rotor against the action of centrifugal force. This configuration permits use of axial poles on the rotor, and results in a machine that is substantially shorter, axially, than a conventional radial air gap inductor alternator of comparable output ratings.

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Clifton Park, NY, United States of America

Swarn S Kalsi