High-voltage thyristor converter and laser with mirror control therefor

Claim 1

A high-voltage thyristor converter and control therefor comprising: (a) a plurality of thyristor modules including a plurality of thyristor elements and accesory electric components connected thereto; (b) a transducer disposed in a ground potential section and producing, in response to an external operation command, an electric control signal for driving said thyristor modules; (c) at least one laser beam irradiator for converting the electric control signal of said transducer into at least one laser beam signal; (d) each of said thyristor modules further including a light sensitive element for converting the laser beam signal into an electric control signal and a converter circuit for converting the control signal of said light sensitive element into a trigger signal adapted for triggering said thyristor elements; and (e) a metallic sealing enclosure disposed at the ground potential for housing said thyristor modules therein, said enclosure having windows to introduce therethrough the laser beam signals to said light sensitive elements in the associated thyristor modules; and (f) mirrors disposed in line with said windows for introducing the laser beam signals individually from said irradiator to said light sensitive elements in the associated thyristor modules.