Patent ID: 7977832

Claim:
A cooling system for a motor having control circuitry and including a motor housing surrounding the motor, the motor driving at least one radial fan at one end thereof for directing airflow across the motor housing, the cooling system comprising: a fan housing mountable to the motor housing at the one end of the motor, said fan housing defining a cavity surrounding the radial fan and configured to direct airflow from the fan axially across the motor housing, said fan housing further defining a diverter chamber radially outboard of the fan, sized to divert a portion of the airflow away from the motor housing; and a base having a heat sink for contacting the control circuitry, said base defining a plenum in communication with said diverter chamber and a channel in communication with said plenum and said heat sink to direct the diverted airflow across the heat sink, wherein said base includes side walls defining said plenum and configured for a tight fit with said diverter chamber of said fan housing for a substantially airtight seal.