US 7,466,046 B2
Methods and apparatus for operating an electric machine
Konrad Roman Weeber, Rexford, N.Y. (US); and Kiruba Sivasubramaniam, Clifton Park, N.Y. (US)
Assigned to General Electric Company, Niskayuna, N.Y. (US)
Filed on Jul. 05, 2006, as Appl. No. 11/428,633.
Prior Publication US 2008/0007132 A1, Jan. 10, 2008
Int. Cl. H02K 9/00 (2006.01)
U.S. Cl. 310—52  [310/54] 14 Claims
OG exemplary drawing
 
1. A method of operating a high speed machine, said method comprising:
providing at least one heteropolar generator that includes a stator, a rotor, and at least one superconducting field coil therein, wherein each of the at least one superconducting field coils comprises a stationary superconducting field coil disposed on the stator; and
coupling at least one cryogenic refrigeration system to the at least one stationary superconducting field coil, wherein the at least one cryogenic refrigeration system is coupled in flow communication with only the at least one stationary superconducting field coil to facilitate reducing an operating temperature of solely the at least one stationary superconducting field coil.