Patent ID: 7301311
Filing Date: 2007-11-27
Classification: H02K

Abstract:
1. A starter-generator, comprising: a multi-phase exciter stator having a plurality of exciter stator windings wound thereon that, upon electrical excitation thereof, generate a rotating exciter stator electromagnetic flux; a rotationally mounted multi-phase exciter rotor disposed at least partially within the multi-phase exciter stator, the multi-phase exciter rotor having a plurality of exciter rotor windings wound thereon that, upon excitation thereof with the rotating exciter stator electromagnetic exciter flux, have non-rectified excitation currents induced therein; a multi-phase main stator having a plurality of main stator windings wound thereon that, upon electrical excitation thereof from a main AC power source, generate a rotating main stator electromagnetic flux; a rotationally mounted multi-phase main rotor disposed at least partially within the multi-phase main stator and mechanically coupled to the exciter rotor, the multi-phase main rotor having a plurality of main rotor windings wound thereon that are electrically connected to receive the non-rectified excitation currents induced in the exciter rotor windings and that, upon excitation thereof with the main stator rotating electromagnetic flux and in response to the non-rectified excitation currents supplied thereto, have currents induced therein that generate a main rotor torque to thereby cause the multi-phase main rotor and the multi-phase exciter rotor to rotate; and an exciter controller electrically coupled to at least the exciter stator windings and configured to selectively supply the electrical excitation thereto, to thereby selectively control the generated main rotor torque.