Dynamoelectric machine having heat pipes embedded in stator core

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.