Electric motor heating/cooling system

A rotor for use with a stator having a stator lamination and end-windings, the rotor comprising:

• a hollow cylindrical body having an inner wall, an outer wall, a first distal end, and a second distal end;
• a first shaft portion coupled to the first distal end of the hollow cylindrical body;
• a second shaft portion coupled to the second distal end of the hollow cylindrical body, the second shaft portion including a fluid feed tube formed therewith having a fluid receive end and a fluid feed end, the fluid feed end extending to a central inner portion of the hollow cylindrical body;
• and
• a plurality of fluid exit ports adjacent the first distal end and the second distal end of the hollow cylindrical body configured to spray fluid onto at least the end-windings of the stator.

A method for operating an electric motor comprising:

• pumping fluid into a hollow cylindrical body of a rotor via a fluid feed tube that is oriented along an axis of rotation of the rotor;
• spraying the fluid from a plurality of fluid exit ports of the fluid feed tube onto an inner wall of the hollow cylindrical body of the rotor, the fluid further flowing along the inner wall of the hollow cylindrical body from a central portion towards fluid exit ports located adjacent distal ends of the hollow cylindrical body while the rotor is rotating;
• and
• spraying the fluid from the fluid exit ports onto at least end-windings of a stator of the electric motor.