COOLING SYSTEM WITH REDUCED WINDAGE LOSS

摘要

IMPROVED COOLING SYSTEM WITH REDUCED WINDAGE LOSS A sealed rotor motor has axially extending ventilation ducts in the poles. A first stationary set of turning vanes is disposed adjacent one end of the rotor in flow communication with the ventilation ducts to provide an initial tangential velocity to coolant gas in the direction of rotor rotation. A second stationary set of turning vanes is disposed adjacent the opposite end of the rotor in flow communication with the ventilation ducts to receive said cooling gas which has a velocity in the direction of rotation and direct it into a circulation system for cooling and return to the first set of turning vanes. The two sets of vanes reduce the windage loss in the motor.