Patent 7119467 was granted and assigned to Pratt & Whitney Canada on October, 2006 by the United States Patent and Trademark Office.
The invention provides means of limiting maximum current conducted through windings of an electric machine having a rotor and a stator. By encouraging an appropriate leakage flux around a winding, a leak impedance can be achieved which may be used, according to the invention, to limit the maximum current in the winding as a matter of machine design.