ELECTRICAL MACHINE VENTILATION SYSTEM Russian patent published in 2011 - IPC H02K9/08 H02K9/10 H02K1/20 H02K1/32 

FIELD: electricity.

SUBSTANCE: under pressure action of fans (6) the air is supplied to inlet collector (8); from it to radial channels (7) and (18) of ventilation zones (15). Air is supplied from radial channels (7) to gap (10) and ventilation channels (12) of rotor; then, through gap (10) and radial channels (7) of ventilation zones (16) via outlet collectors (11) it flows to low pressure area. The air is also supplied from radial channels (18) via outlet collectors to low pressure area. Tangential air flow in channels (7) of ventilation zones (15) and (16) is performed through bypass holes (25). Tangential air flow in channels 18 is performed through bypass holes (20). Introduction of ventilation channels of stator, which are closed on the side of the gap, to zones (12) and (13) will allow reducing the temperature of active parts of stator in outlet zones approximately by 25°C and rotor winding temperature approximately by 10°C. At that, temperature field of active parts as to length of machine becomes more uniform.

EFFECT: increasing unit capacity of electrical machine owing to reducing temperatures of active parts of its stator and rotor.

4 cl, 4 dwg