umrichteranordnung with several in the controlled stromrichterelementen series

摘要

An electrical converter arrangement comprises a plurality of series-connected controllable current converter elements such as thyristors which together form one and the same path for current flow. The converter elements forming this current path are not fired simultaneously but rather are fired sequentially either singly or in groups by means of a pulse generator in cooperation with delay means interposed in the circuit connections to the various converter elements, or element groups so that the proper time delays are established for ,firing. By firing the converter elements in sequence, i.e. in stages, one avoids formation of undesirable steep voltage jumps. The required sequential firing delays can be obtained by use of individual delay devices having progressively longer time delays, or a ring counter can be utilized.