LIQUID-COOLED ROTARY ELECTRIC MACHINE HAVING AXIAL END COOLING

摘要

A liquid-cooled rotary electric machine including jacket defining a heat transfer surface in conductive thermal communication with a stator and having an axial end portion partially enclosing an interior volume. A heat source is in conductive thermal communication with a wall of the jacket axial end portion. A fluid channel traverses the heat transfer surface between opposite axial ends of the jacket, and a fluid passage in fluid communication with the fluid channel is defined by jacket axial end portion walls. A flow path of liquid coolant through the machine is defined by the fluid channel and the fluid passage between a machine coolant inlet and outlet, whereby at least a portion of heat transferable between the heat source and the fluid passage is convectively transferable between the jacket axial end portion walls and liquid coolant along the flow path. Also a method for liquid-cooling a rotary electric machine.

主权项

1. A liquid-cooled rotary electric machine comprising:
a coolant inlet and a coolant outlet; a stator having a central axis; a rotor surrounded by the stator and having rotation relative to the stator about the central axis; a jacket defining a heat transfer surface in conductive thermal communication with the stator, the jacket having opposite axial ends, an interior volume in which the stator and rotor are located, and an axial end portion having walls, the interior volume partially enclosed by the jacket axial end portion; a fluid channel traversing the jacket heat transfer surface between the jacket axial ends; a fluid passage defined by jacket axial end portion walls and in fluid communication with the fluid channel, a flow path of liquid coolant through the machine defined by the fluid channel and the fluid passage between the coolant inlet and the coolant outlet; and a heat source in conductive thermal communication with a jacket axial end portion wall, whereby at least a portion of heat transferable between the heat source and the fluid passage is convectively transferable between the jacket axial end portion walls and liquid coolant along the flow path.