Patent ID: 6734584
Filing Date: 2004-05-11
Classification: H02K

Abstract:
A system for facilitating cooling of a totally enclosed motor, comprising:an electrical core adapted to provide energy to the motor, the electrical core generating heat during normal operation of the motor; a motor shaft coupled to the electrical core; a frame adapted to surround and support the electrical core; a first bearing assembly located at a drive end of the motor, the first bearing assembly being operable to support the motor shaft at the drive end of the motor, the first bearing assembly being disposed between a first inner cap and an inside surface of a first end bracket and the second bearing assembly being disposed between a second inner cap and an inside surface of a second end bracket; a second bearing assembly located at an opposite drive end of the motor, the second bearing assembly being operable to support the motor shaft at the opposite drive end; and a thermal barrier disposed between the core and an inner side of the first bearing assembly substantially insulating the first bearing assembly at the drive end of the motor from the heat generated by the electrical core, the thermal barrier comprising an annular inner cap thermal barrier and an annular end bracket thermal barrier, the annular inner cap thermal barrier being mounted to and substantially surrounding a portion of the first inner cap that is exposed to the internal air of the motor and the annular end bracket thermal barrier being mounted to and substantially surrounding a portion of the first end bracket that is exposed to the internal air of the motor, so that the first bearing assembly is insulated from the heat generated by the electrical core, the inner cap thermal barrier and the end bracket thermal barrier being coupled to one another by an annular gasket that provides a seal for the thermal barrier.