ELECTRICAL MACHINE ROTOR VENTILATION SYSTEM (VERSIONS) Russian patent published in 2018 - IPC H02K1/32 H02K3/24 H02K9/16 

FIELD: electricity.

SUBSTANCE: in the rotor, the space between the slot insulation at the slot walls and the side surfaces of the winding is divided along the length of the slot into zones. To ventilate the winding, a wavelike channel is arranged in each zone, opened at the inlet of the cooling stream to the sub-slot channel, and at the outlet to the air gap. The channel is arranged by the radially oriented distance spacers of variable size between the side surface of the winding and the slot insulation. The channel can be arranged by radially oriented projections of variable size on the sides of the winding. The wavelike ventilation channels inside the rotor winding are arranged by an axial displacement of radially oriented holes of variable depth.

EFFECT: increase of the permissible current density in the rotor winding and increase of the unit capacity of the electrical machine without increasing its dimensions and weight.

7 cl, 8 dwg