Patent ID: 6710479
Filing Date: 2004-03-23
Classification: H02K

Abstract:
A generator having a stator and a rotor that are cooled,the generator comprising a casing, the rotor accommodated in the casing and rotatably supported in the casing, and the stator accommodated in the casing and fixed with a clearance around the rotor, wherein the stator is constructed of an iron core having a plurality of steel sheets laminated, and a coil wound around the iron core, the casing is provided with a cooling oil entrance, a cooling oil exit, a cooling air entrance, and a cooling air exit, the iron core is provided with a cooling oil passage that passes through inside of the iron core and communicates between the cooling oil entrance and the cooling oil exit, and with a cooling air passage that passes through the inside of the iron core and communicates between the cooling air entrance and the cooling air exit via a clearance between an internal periphery of the iron core and an external periphery of the rotor, the cooling oil passage is constructed of a radial-direction cooling oil passage provided substantially in a radial direction, and an axial-direction cooling oil passage provided substantially in an axial direction, and the cooling air passage is constructed of a first radial direction cooling air passage that communicates with an external periphery of the iron core and a second radial-direction cooling air passage that communicates with an internal periphery of the iron core and another radial-direction cooling air passage provided in a section from an internal periphery of the iron core to the specific point.