Electric machine, such as alternator with rectifier for supplying vehicle power supply network, has profiled air channel arranged between heat sinks for positive and negative diodes

摘要

The alternator (10) has a negative heat-sink (24) carrying negative diodes, and a positive heat-sink (26) carrying positive diodes arranged above it in a sandwich-like manner. At least one profiled air channel, specifically an air dividing plate (34,35), is arranged between the positive and negative heat sinks so that it forms a ventilation channel (36,37) in which at least part of the cooling air stream flows over at least one of the diodes. An Independent claim is included for an alternator device.