| 摘要 |
PROBLEM TO BE SOLVED: To provide a dynamo-electric machine and its cooling method for uniformizing a temperature of a stator coil within a stator core and reducing the maximum temperature of the stator coil. SOLUTION: In the dynamo-electric machine 30D and its cooling method, a cooling gas 38 is cooled by a gas cooler 41, and introduced into a cooling gas chamber 61 as the cooling gas 38 is in a cooled state. In a stator ventilation duct 54F disposed from the cooling gas chamber 61 to a stator 35D, the temperature within the stator 35D is uniformized and the maximum temperature is reduced by radially and inwardly flowing the cooling gas 38 to the stator core 55, arranging so as to insert the stator ventilation duct into only a face of the stator coil 58 located downstream of the cooling gas 38 flowing in an air gap 34, flowing the cooling gas 38 to the face of the stator coil 58 without a spring 79 and a spacer as a thermal resistance, and forming a ventilation duct 68 provided with a notch 78 in a stator wedge 67A used for the stator 35D. COPYRIGHT: (C)2006,JPO&NCIPI
|
