| 摘要 |
A vehicle alternator is disclosed including a metallic frame supporting a stator having an armature winding and a rotor having a field winding. A rectifying unit is fixedly mounted on the frame for rectifying an alternating current voltage induced in the armature winding upon rotation of the rotor and comprises a stack of a positive-electrode radiating fin, carrying thereon a positive-electrode rectifier element, and a negative-electrode radiating fin, carrying thereon a negative-electrode rectifier element, between which a heat conducting sheet having insulation property is intervened. The frame carries thereon an insulating cover for covering the rectifying unit. The cover includes an encompassing section that collectively encompasses the positive-electrode rectifier element and an associated neighborhood to prevent the cooling wind drawn to an inside of the cover due to rotation of the cooling fan from directly impinging upon the positive-electrode rectifier element.
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