Patent 7126313 was granted and assigned to Pratt & Whitney Canada on October, 2006 by the United States Patent and Trademark Office.
The invention includes an electric machine having a rotor, stator and at least one winding in the stator adapted to conduct a current, and a secondary winding, electrically isolated from the first winding and inductively coupled to the first winding, which may be used to control at least one of the output voltage and current of the first winding.