Patent ID: 7723874

Claim:
A cooling system for an integrated electric motor-inverter, the integrated electric motor-inverter including a housing, a motor, and an inverter, the motor and the inverter disposed within the housing, and the motor including a stator, the system comprising: a cooling jacket disposed concentric to the stator and including an inner wall and an outer wall, the inner wall in direct contact with the stator; a first coolant disposed between the cooling jacket inner and outer walls; a condenser disposed concentric to the cooling jacket; a spray head disposed adjacent the inverter within the housing; and a second coolant in flow communication with the spray head, wherein during system operation, (i) the second coolant is directed onto the inverter by the spray head, (ii) at least a portion of the second coolant enters the condenser in a gas phase, and (iii) the second coolant contacts the cooling jacket outer wall and heat from the second coolant is transferred through the cooling jacket to the first coolant causing the second coolant to phase change into a liquid.