Patent ID: 8125095

Claim:
A generator for producing AC electrical power from a variable speed prime mover, said generator comprising: an input shaft which is rotatable at variable rotational rates; a first rotor connected to said input shaft for rotation at variable rotation rates by said input shaft, said first rotor having a perimeter with a plurality of first rotor poles positioned thereabout, said rotor poles being configured to generate a magnetic field; a second rotor having a plurality of second rotor poles configured to magnetically interact with the magnetic field of said first rotor to be urged to rotate in the same direction of rotation of said first rotor; a stator placed concentrically around said second rotor, said stator having a plurality of windings positioned thereabout, said second rotor and said stator each being configured for the second rotor poles to induce an AC electrical power in said stator; a first source of DC electrical power connected to said first rotor to supply a DC electrical current thereto; a second source of DC electrical power connected to said second rotor to supply a DC electrical current thereto; a speed sensor positioned and configured to sense the rotation rate of said second rotor, said speed sensor configured to supply a second rotor rate signal reflective of said rotation rate of said second rotor; a speed adjuster connected to one of said first rotor, said second rotor and said first source of DC electrical power to vary said rotation rate of said second rotor; a speed controller connected to said speed sensor to receive said second rotor rate signal and connected to said speed adjuster to supply a speed control signal to said speed adjuster to vary said rate of rotation of said second rotor: a torque sensor positioned and configured to sense a torque between said first rotor and said second rotor, said torque sensor configured to supply a torque level signal reflective of said torque between said first rotor and said second rotor; a torque adjuster connected to one of said first rotor, said second rotor and said first source of DC electrical power to vary said torque; a torque controller connected to said torque sensor to receive said torque level signal and connected to said torque varying means to supply a torque control signal to said torque adjuster to vary said torque a stator voltage sensor positioned and configured to sense said stator voltage, said stator voltage sensor configured to supply a stator voltage level signal reflective of said stator voltage; a stator voltage adjusted connected to said second rotor and said source of DC electrical power to vary said stator voltage; and, a stator voltage controller connected to said stator voltage sensor to receive said stator voltage level signal and connected to said stator voltage adjuster to supply a stator voltage control signal thereto to vary said stator voltage.