Patent ID: 9064630
Filing Date: 2015-06-23
Classification: H01F,H02K

Abstract:
1. An integrated rotary transformer and resolver, comprising: a stator having an outer surface, the outer surface having a first notch along a perimeter of the outer surface and a plurality of slots disposed along the outer surface; a rotary transformer primary winding wrapped around the perimeter of the outer surface of the stator within the first notch; a plurality of sensing coils, the plurality of sensing coils disposed in at least some of the plurality of slots; a rotor having an inner surface, the inner surface having a second notch along a perimeter of the inner surface, and an upper surface varying sinusoidally from a first predetermined thickness to a second predetermined thickness; a rotary transformer secondary winding wrapped around the perimeter of the inner surface of the rotor within the second notch, wherein the rotary transformer primary winding of the stator is configured to transfer power to the rotary transformer secondary winding of the rotor; and a controller electrically coupled to the plurality of sensing coils and configured to determine a position of the rotor based upon a voltage induced in each of the sensing coils due to a thickness of the rotor opposed to the respective sensing coil.