Integrated high frequency rotary transformer and resolver for traction motor

A motor, comprising:

• an interface configured to receive an alternating current;
• a stator coupled to the interface the stator having a primary winding and having an outer surface and a plurality of slots disposed along the outer surface;
• a plurality of sensing coils, the plurality of sensing coils disposed in at least some of the plurality of slots;
• a rotor having a secondary winding positioned opposite the first winding of the stator and having a surface varying from a first predetermined thickness to a second predetermined thickness;
• 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.

An apparatus, comprising:

• a rotor having an sinusoidal upper surface and having a notch in an inner surface;
• a first winding wound in the notch in the rotor;
• a stator having a notch on an outer surface, the outer surface of the stator positioned opposite the inner surface of the rotor, the outer surface further including a plurality of slots;
• a secondary winding wound in the notch in the stator;
• a plurality of sensing coils wound in at least some of the plurality of slots;
• and
• a controller electrically coupled to the plurality of sensing coils and configured to determine a position of the rotor based upon an output of the plurality of sensing coils.