WATER-AND-AIR COOLED ELECTRICAL MACHINE Russian patent published in 2004 - IPC

FIELD: electrical engineering; high-voltage electrical machines including turbogenerators. SUBSTANCE: cooling system for high-voltage electrical machines with their stator carrying multitier winding of high-voltage cables placed in deep slots is assembly of water-cooling system made in the form of flat cooling members disposed between axial stacks of stator core and used for intensive cooling of stator core and winding and air-cooling system for cooling stator end windings and rotor winding. Air flowrate and windage loss are greatly reduced due to water cooling of stator winding and cooling intensity of rotor greatly increases as hot air escape from rotor to air gap is not opposed by stator core. EFFECT: enhanced cooling efficiency of electrical machine stator and rotor. 1 cl, 1 dwg