DEVICE FOR CONTROL OF THYRISTOR GATES Russian patent published in 1999 - IPC

FIELD: electrical engineering, in particular, regulation of load voltage of power and converting transformers. SUBSTANCE: thyristor gates are connected in series to reactor in system for switching taps of windings of transformer which has pulse generator, which is connected to isolating transformers through electronic gates with their control system. Output of isolating transformers is connected to control circuits of each thyristor. Output of rectifier in control circuit is connected to terminal of first resistor and through second resistor to control electrode of thyristor, first terminals of third resistor and diode. Another output of rectifier is connected to another terminal of first resistor, one terminal of capacitor and to cathode of thyristor through gate with control input. First terminal of non-linear resistor is connected to control input of gate; second terminal of non-linear resistor is connected to second terminal of third resistor. Second terminal of capacitor is connected to second terminal of diode. Connection points of non-linear resistor and third resistor as well as those of capacitor and diode are connected to one another. EFFECT: increased reliability of device. 1 dwg