| 摘要 |
PROBLEM TO BE SOLVED: To provide a cooling apparatus for a rotary electric machine which attains improvement of cooling performance by increasing an oil amount and an area which come into contact with a coil end, and prevention of a decline in heat-transfer coefficient of oil, together. SOLUTION: In the cooling system for the rotating electric machine including an oil cooling circuit which directly injects or drops cooling oil from an upper part of the coil end 8, 8, an outer peripheral oil path groove 8a is formed at an outer periphery of the coil end 8, 8, while an inner peripheral oil path groove 8b is formed at an inner periphery of the coil end 8, 8. The forming range of the outer peripheral oil path groove 8a is set to a range of 90°right and left respectively in a circumferential direction from the upper part of the coil end 8, 8, while the forming range of the inner peripheral oil path groove 8b is set to a range of 90°right and left respectively in a circumferential direction from a lower part of the coil end 8, 8. COPYRIGHT: (C)2007,JPO&INPIT
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