| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetogenerator which can properly cool an armature. SOLUTION: A plurality of vent holes 1d are provided at the bottom wall 1b of a rotor yoke 1. Cooling wind introducing units 9 for introducing cooling wind to the respective vent holes 1d are provided at an annular plate 8 fixed to the bottom wall 1b of the rotor yoke, and the cooling winds are respectively introduced into the vent holes 1d through cooling wind introducing passages 10 formed at the insides of the cooling wind introducing units 9. The respective cooling wind introducing units are provided so as to form a rectangular shape in the sectional shape of each cooling wind introducing passage 10, thereby increasing the sectional area of the cooling wind introducing passage 10. The sectional area of the opening of the cooling wind introducing passage is increased by opening the opening end 9a of each cooling wind introducing unit 9 in the direction inclined to the bore side of the rotor yoke with respect to the tangential direction of the rotor yoke, thereby increasing the sectional area of the opening of the cooling wind introducing passage and thereby increasing the amount of air to be introduced into the cooling wind introducing passage. COPYRIGHT: (C)2004,JPO&NCIPI
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