Patent attributes
An apparatus and method for cooling a compressor motor (152)having a motor stator (162) and rotor (166)in a refrigerant system(100). The method cools the rotor and the stator, electromagnetic bearings (160)located within a compressor housing providing refrigerant liquid to the stator internal channels, the channels being in fluid communication with a rotor passageway (172), and a flow-control device (168) controlling refrigerant flow into the stator. A temperature monitoring device (176) in communication with a controller (140) monitors motor temperature. The controller (140)evaluates the motor temperature and adjusts refrigerant flow through the flow control device (168), maintaining the motor (152) within a predetermined temperature range.
