CIRCUIT ARRANGEMENT WITH A THYRISTOR CIRCUIT, AS WELL AS A METHOD FOR TESTING THE THYRISTOR CIRCUIT

摘要

A thyristor circuit comprising at least one series circuit in which two or more thyristors are connected in series. Each thyristor is parallel-connected to an RC member. A control device can energize the thyristors individually and independently of each other by a control signal, so that each thyristor can be individually switched into its conducting condition. During a test sequence, the thyristors are switched successively into their conducting condition, wherein, in a series circuit and/or in the thyristor circuit, respectively only one thyristor is in its conducting condition. While a thyristor is conducting, the capacitor of the associate RC member discharges and produces a thyristor current. As a result, the conducting condition is maintained until the thyristor current falls below the holding current. The control device can use the thyristor voltage and/or the thyristor current to evaluate the function or the switching behavior of the thyristor.

主权项

1. A circuit arrangement, comprising:
a thyristor circuit comprising at least one series connection of at least two thyristor groups, each of the at least two thyristor groups comprising:
at least one thyristor comprising a thyristor or two antiparallel connected thyristors; andan RC-circuit connected in parallel with the at least one thyristor, the RC-circuit comprising a series connection of a capacitor and a first resistor; and a control device connected with control input terminals of the thyristors via control lines, and configured to control each of the thyristors separately by a control signal applied to the control input terminal, in order to switch the respective thyristor into a conducting condition, and to execute a test sequence, in which all of the thyristors of the series connection or of the thyristor circuit are controlled subsequently by a respective control signal, so that at least one of the at least one thyristor of at least one of the at least two thyristor groups is in the conducting condition.