VENTILATION SYSTEM FOR ELECTRIC MOTOR Russian patent published in 1997 - IPC

FIELD: electric engineering. SUBSTANCE: device has housing 1 in which stator core 2 with winding is mounted. Radial ventilation slots 4 on side of space 5 carry ring wall 7. Radial spacing struts 8 and tangential spacing struts 9 are mounted in slots 4. System of struts provide pair of U-shaped channels 10 in region of each tooth. Channels 10 are connected to periphery of core 2. Space between core 2 and housing 1 is filled with longitudinal ribs 11 between which chambers 12 for input of gas to channels 10 and chambers 13 for output of gas from channels 10 are located. Ring 14 which is made from resin-impregnated fabric laminate may be used instead of walls 7 on side of space 5 on surface of bores of core 2. EFFECT: improved heat condition of active members of stator of electric motor. 3 cl, 3 dwg