| 摘要 |
PROBLEM TO BE SOLVED: To attain high cooling efficiency at a low refrigerant rate in a dynamo-electric machine using the inside of a slot in a stator as a refrigerant passage. SOLUTION: An opening of a slot 25 in the stator 5 is closed with an under plate 40 serving as a closing member, and a plate 41 serving as a passage cross-section adjusting member is disposed in the roughly central section of the slot 25. As a result, a passage cross section S2 of the refrigerant passage 29A formed inside the slot 25 is smaller than a passage cross section S1 where the plate 41 is not disposed by an amount of the cross section of the plate 41, thereby increasing cooling efficiency.
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