Support system for power semiconductor stack - uses column soldered at ends to two rigid plates sandwiching semiconductor stack

摘要

The support system comprises two parallel plates joined together by a central pillar which fits through each of the plates. The pillar is soldered to each of the plates on either side and it is pref. made of the same metal as the plates e.g. stainless steel or aluminium. Pref. each of the plates has a bore into which a respective end of the column is fitted and which has a chamfered edge on the outer side of the plate with the end face of the column lying at the base of the chamfer. Two column stacks respectively comprising diodes and thyristors are pref. held between the plates one of which acts as a cover for the casing containing the refrigeration fluid.