Air-cooled current regulator module, e.g. GTO thyristor, for train

摘要

The current regulator module has at least two power semiconductor switches (36,38), e.g. GTO thyristors, in good thermal contact with the base plate (6) of a heat sink profile (2) having a number of spaced cooling ribs (8) on the opposite side of the base plate. The base plate has a reduced thickness at its end section (10), receiving a L-shaped circuit board holder (42) for a control stage. The heat sink profile is fitted with a cover (24), dividing the region above the base plate into two thermally separate zones, the part of the cover extending across the semiconductor switches provided with cooling ribs (26).