摘要 |
<P>PROBLEM TO BE SOLVED: To provide a vehicle AC generator in which the cooling performance of a rectifier can be enhanced. <P>SOLUTION: A rectifier 4 of a vehicle AC generator 1 has a radiation fin 42 secured to a frame 5 and cooling a rectification element 41. The radiation fin 42 has a first fin 43 extending in the radial direction for the rotating shaft 32 of a rotor 3. A rear cover 6 has a cooling air suction window 61 at a position on the radial outside of the first fin 43 and closer to the rear side than the first fin 43. Cooling air taken into the rear cover 6 from the suction window 61, as a cooling fan 33 rotates, flows from the radial outside to the radial inside along the first fin 43, and further flows from a ventilation space 45 formed on the radial inside of the first fin 43 to the cooling fan 33 side. <P>COPYRIGHT: (C)2013,JPO&INPIT |