METHOD AND APPARATUS FOR VENTILATING ELECTRIC MACHINES

摘要

A rotating electric machine (10) includes a housing (12) having a first inlet (28) at one end (29) for admitting ventilation air for cooling the machine (10) and a second inlet (30) at the other end (31) which also admits cooling air into the machine (10). A fan (22) located at once end (31) of the housing (12) draws air into the housing (12) through the first (28) and second (30) inlets; and forces it out of the housing (12) through. a single outlet (32) located near one end (313.of the housing (12). Air entering the second inlet(30) passes through openings (37) in the fan carrier (24), cooling isolated areas f381 of the rotor (20) and flowing through the fan blades (26) with the air which enters through the first inlet (28).