Patent ID: 6316852
Filing Date: 2001-11-13
Classification: H02K

Abstract:
In a rotating machine comprising a rotor iron core, plural coil slots provided on an outer peripheral face in an axial direction of said rotor iron core and arranged with a predetermined interval in a circumferential direction of said rotor iron core, sub-slots opened at respective bottom portions of said coil slots, rotor windings received in said coil slots, wedges for fixing said rotor winding to said rotor iron core, creepage blocks for insulating between said wedges and said rotor windings, and an air ventilation passage extending through said rotor windings, said wedges and said creepage blocks for allowing air to flow through said creepage blocks and said wedges from said sub-slots in a radial direction of said rotor iron core, the rotating machine being characterized in that:air ventilation holes are provided in the most outer diameter turn of said rotor winding, which is in contact with said creepage blocks, respective ones of said air ventilation holes provided in the most outer diameter turn of said rotor winding being disposed so as to communicate in the radial direction with plural holes provided in at least one inside turn of said rotor winding other than the most outer diameter turn;hole portions of said air ventilation holes are disposed so as to communicate in the radial direction with a side of said wedges and to communicate in the radial direction with hole portions of the plural holes extending in an axial direction which are provided on the inside turns other than the most outer diameter turn; andsaid air ventilation holes are constituted so to extend continuously in the axial direction so as to communicate in the radial direction with the side of said wedges through said creepage blocks.