High-voltage thyristor converter

Claim 2

A high-voltage thyristor converter comprising: a plurality of thyristor modules including a plurality of thyristor elements and accessory electric components connected thereto; 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; and a plurality of laser beam irradiators for converting the electric control signal of paid transducer into laser beam signals; each of said thyristor modules further includes a light sensitive element for convering 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 element.

Claim 3

The thyristor converter as defined in claim 1, wherein each of said laser beam irradiators is spaced apart laterally from the associated thyristor module by a predetermined insulation distance.

Claim 4

The thyristor converter as defined in claim 1, wherein a metallic sealing enclosure is disposed at the ground potential for housing said thyristor modules therein, said enclosure having windows to introduce therethrough the laser beam signals from said laser beam irradiators to said light sensitive elements in the associated thyristor modules.

Claim 5

The thyristor converter as defined in claim 1, wherein mirrors are provided for introducing the laser beam signals individually from said irradiators to said light sensitive elements in the associated thyristor modules.

Claim 6

The thyristor converter as defined in claim 4, wherein said mirrors are directionally adjustable.

Claim 7

A high-voltage thyristor converter comprising: a plurality of thyristor modules including a plurality of thyristor elements and accessary electric components connected thereto; 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; a laser beam irradiator for converting the electric control signal of said transducer into a laser beam signal; and a plurality of half mirrors for reflecting the laser beam signal from said irradiator and thereby directing said beam signal toward said thyristor modules: wherein each of said thyristor modules further includes 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 element.

Claim 8

A high-voltage thyristor converter comprising: a plurality of thyristor modules including a plurality of thyristor elements and accessary electric components connected thereto; 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; a laser beam irradiator for converting the electric control signal of said transducer into a laser beam signal; and a plurality of half mirrors for reflecting the laser beam signal from said irradiator and thereby directing said beam signal toward said thyristor modules: wherein each of said thyristor modules further includes 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 element.

Claim 9

The thyristor converter as defined in claim 6, wherein said half mirrors are disposed sequentially on the travel path of the laser beam signal emitted from said irradiator in such a manner as to have different transmissi- vities which become sequentially lower in accordance with increase of the distance from said laser beam irradiator.