Bridge rectifier current-time area controller - has impedances at mains terminals and shunt thyristors with gates connected to controller

摘要

Simplified design and reliable operation of the circuit controlling the voltage-time area of the rectifier for the self-excitation of a synchronous machine features current-limiting impedances ZR'ZS and ZT; The latter are connected to the mains terminals R'S and T. Each of the shunt lines features a control thyristor (3) with its gate connected to the control circuit (4). The control circuit includes potentiometer (9) fed by the bridge rectifier (I) and connected to the gate electrodes through resistors (5). The source of the variable voltage is connected to resistors (5), and the control circuit (4) features an additional thyristor with gate connected to the bridge rectifier through a reference unit.