Liquid cooled mount for power semiconductors - has stack of ceramic encased semiconductors immersed in liquid in finned metal casing

摘要

The liquid cooled mount, for power semiconductors in locomotives, has the ceramic-encased semiconductors (e.g.5) (diodes and/or thyristors) mounted in a stack in the usual way between two end plates (10,11) and fixed via an insulator (24) to a base plate (23) through which the electrical connections pass. The base plate forms the end plate of a cylindrical aluminium housing (1) filled with the cooling liquid, e.g. liquid flourine hydrocarbon (freon). The outer surface of the housing has fins (25). The base plate is bolted and sealed to the open end of the housing.