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    • 10. 发明专利
    • NL6811015A
    • 1969-04-29
    • NL6811015
    • 1968-08-02
    • H01L23/473H01L25/03H01L1/22
    • 1,220,148. Rectifier assemblies. SIEMENS A.G. 1 Aug., 1968 [26 Oct., 1967], No. 36865/68. Heading H1K. A rectifier assembly comprises two or more parallel stacks of rectifier elements clamped between yoke members, the elements at one end of each stack being electrically interconnected and electrical lead-in and out conductors being disposed to one side of the stacks and connected thereto by resilient members. Fluid coolant is passed through hollow cooling elements which form part of the stack and are thus pressed into heat conducting contact with respective rectifier elements. In the arrangement shown in which only one stack is fully visible the elements, encapsulated in disc shaped housings are connected to form a 3-phase bridge. The D.C. output conductors P, N and A.C. inputs R, S and T (not visible) include flexible links 39 and the stacks may be suspended from them. Their ends are clamped between hollow cylindrical cooling elements 9, 10, 11 and may form cover-plates therefor. Coolant is supplied to the cooling elements via inlet and outlet manifolds 36, 37 prefabricated from plastics material and the entire assembly sealed in a watertight casing 38 thereby preventing ice accumulation when the system is operated at sub-zero temperatures as when cooling is achieved by evaporation of low boiling point coolants in the hollow elements. The stacks are clamped between yokes 20, 21, one of which electrically connects the end elements of the stacks. Clamping pressure is provided by a central nut and bolt arrangement and is communicated to the stacks via balls disposed between them and the yoke 20. Where, as shown, the rectifier elements are thyristors the controlling pulse repeaters 40 are mounted against the stacks. An arrangement with vertical stacks is also envisaged.