Patent ID: 7839031

Claim:
A spray cooled motor utilizing evaporative thin film spray cooling comprising: a motor housing with an interior and an exterior, and an output shaft aperture therein; a stator mounted within the interior of the motor housing; a rotor mounted within the interior of the motor housing; an output shaft operatively attached to rotate with the rotor and which extends into the output shaft aperture in the motor housing; a coil winding mounted within the interior of the motor housing; a plurality of atomizers configured to spray and distribute a liquid phase coolant on at least one of the stator and the rotor, said plurality of atomizers being configured to impart sufficient coolant on at least one of the stator and the rotor to provide and substantially maintain an evaporative spray thin film coolant layer; a coolant pump in fluid communication with the plurality of atomizers; a condensing return channel configured to received sprayed liquid and gaseous coolant and return the coolant for pumping by the coolant pump; a coolant filter disposed to receive and filter coolant from the condensing return channel and allow filtered passage of the coolant; and further wherein the coolant pump is mounted external to the motor housing.