Patent ID: 7247958

Claim:
A dynamo-electric machine comprising: a stator constituted by a stator iron core, a stator iron core pressing member for pressing said stator iron core, and a stator coil wound around said stator iron core; a rotor constituted by a rotor iron core inserted to an inner periphery of said stator via a gap, a rotor coil inserted to a plurality of slots provided in said rotor iron core, and a holding ring covering an outer periphery of a rotor coil end portion protruding from said rotor iron core end portion; and a baffle plate arranged in an inner diameter side of said stator iron core end portion and distributing a cooling medium cooling an inner side of the machine, wherein said baffle plate is a plurality of concentric plates laminated in a diametric pattern, a gap flowing the cooling medium is provided in an axial direction between an outermost peripheral plate of said baffle plate and an inner periphery of said stator iron core pressing member and/or between said baffle plate and an inner periphery of said stator iron core end portion, an axially-penetrating opening portion generating a cooling medium flow which is combined with the cooling medium flowing through said gap and generates a flow along the inner periphery of said stator iron core pressing member and/or the inner periphery of said stator iron core end portion is formed between the plurality of plates constituting said baffle plate, and the opening portion is positioned close to a center in a diametrical direction rather than the inner peripheral surface of said stator iron core of said baffle plate.