Patent ID: 6124653
Filing Date: 2000-09-26
Classification: H02K

Abstract:
A generator including an induced-draft cooling arrangement comprising:a rotor with a rotor shaft rotating about a rotor axis;a cooling arrangement for cooling a cooling medium which circulates through said generator to remove heat from said generator;a main fan attached to the rotor shaft of the generator for drawing in the cooling medium which is heated by heat-generating elements of the generator and for drawing the cooling medium away from the generator substantially perpendicularly to the axis of the rotor shaft to the cooling arrangement;whereby the drawn-in cooling medium is expelled with a swirl at high velocity by the main fan and is received by a cooling-duct casing which directs a first quantity of the cooling medium to the cooling arrangement via at least one fluidic constriction;the cooling-duct casing having at least one bypass duct which receives a second quantity of the cooling medium expelled into the cooling-duct casing by the main fan upstream of the fluidic constriction diverts the second quantity of the cooling medium around the fluidic constriction and directs the second quantity of the cooling medium to at least one outflow zone lying downstream of the fluidic constriction and upstream of the cooling arrangement.