Abstract: A method and system of cooling an enclosure or motor is disclosed. An exemplary permanent magnet electric motor is formed with an external stator and an internal rotor. The motor controller is in thermal proximity to the motor but is thermally isolated from the motor by an air chamber. In one exemplary embodiment, one or more heat sinks are provided to create efficient heat removal paths. In another exemplary embodiment, one of more heat pipes are located in the system.

Abstract: Thermal management of an electric machine is implemented by selecting a stator core configuration in accordance with an intended machine application and determining the minimum heat dissipation necessary to maintain the temperature of the core segment configuration at peak excitation within acceptable limits is determined. A core model is used to ascertain thermal distribution at peak excitation. In accordance therewith, a pattern in the selected core segment configuration is established for placement of at least one heat pipe for removing heat from the core. Preferably, heat pipes are located at high thermal points in the core segment and oriented in alignment with mapped lines of flux. By placing the heat pipe either at the center of the core or at a recessed boundary layer between the core and winding, the heat pipe can capture and conduct excess heat away from the heat generating areas of the core, thus maintaining the core and the excitation windings at desired temperature.

Abstract: A dynamoelectric machine, having a stator and rotor, is enclosed in a sealed housing. An impeller fixed to the rotor shaft creates air circulation through the housing and machine components for contact with one or more sealed containers of a coolant medium. The sealed container provides heat transfer from the circulated air through evaporation of the coolant medium. The sealed container has one closed end located within the housing and another closed end external to the housing. Heat from the evaporated coolant medium is transferred to the environment external to the housing through condensation of the vapor at the external end of the container. The sealed container may be stationary or rotatable with the rotor shaft. A plurality of heat transfer containers may be provided.

Abstract: A method and system of cooling an enclosure or motor is disclosed. An exemplary permanent magnet electric motor is formed with an external stator and an internal rotor. The motor controller is in thermal proximity to the motor but is thermally isolated from the motor by an air chamber. In one exemplary embodiment, one or more heat sinks are provided to create efficient heat removal paths. In another exemplary embodiment, one of more heat pipes are located in the system.

Abstract: Thermal management of an electric machine is implemented by selecting a stator core configuration in accordance with an intended machine application and determining the minimum heat dissipation necessary to maintain the temperature of the core segment configuration at peak excitation within acceptable limits is determined. A core model is used to ascertain thermal distribution at peak excitation. In accordance therewith, a pattern in the selected core segment configuration is established for placement of at least one heat pipe for removing heat from the core. Preferably, heat pipes are located at high thermal points in the core segment and oriented in alignment with mapped lines of flux. By placing the heat pipe either at the center of the core or at a recessed boundary layer between the core and winding, the heat pipe can capture and conduct excess heat away from the heat generating areas of the core, thus maintaining the core and the excitation windings at desired temperature.

Abstract: A dynamoelectric machine, having a stator and rotor, is enclosed in a sealed housing. An impeller fixed to the rotor shaft creates air circulation through the housing and machine components for contact with one or more sealed containers of a coolant medium. The sealed container provides heat transfer from the circulated air through evaporation of the coolant medium. The sealed container has one closed end located within the housing and another closed end external to the housing. Heat from the evaporated coolant medium is transferred to the environment external to the housing through condensation of the vapor at the external end of the container. The sealed container may be stationary or rotatable with the rotor shaft. A plurality of heat transfer containers may be provided.