Alternator for motor vehicle

摘要

The alternator has a rectifier with heat sinks (29, 31) equipped with positive and negative diodes (28, 30), respectively. The heat sinks are provided with multiple through cooling air openings (37, 39) around the respective diodes. The heat sink (29) installed at an inlet side of cooling air is provided with portions projected from a mounting surface (29a) of the diodes towards the cooling air inlet side.