DEVICE FOR CONTROLLING M-PHASE RECTIFIER CONVERTER Russian patent published in 1995 - IPC

FIELD: rectifier converters. SUBSTANCE: converter has synchronization unit which has inputs connected with power inputs of rectifier converter, mode setting unit with two outputs - p and q, 2m-channel distributor. Converter is provided additionally with the second 2m-channel distributor, 2OR-NOT circuit, square-wave generator and meander former. Both 2m-channel distributors are made in form of logic gates which have three conditions. Like information outputs of the gates are integrated and connected to outputs of synchronization unit. The first control inputs of the distributors are connected with outputs of meander former. The second inputs are integrated and connected to output of 2OR-NOT gate. Inputs of 2OR-NOT gate are connected with p and q outputs of setting unit. Like outputs of 2m-channel distributors are connected to paraphase inputs of two-clock thyristor switches of output stages. Converter is provided with protection system made in form of elements being sensitive to amplitude and duration of current in primary winding of pulse transformers of output stages. Protection circuit permits to inspect duration of control pulse of power rectifiers by digital method and to de-energize power supply at pre-trouble modes. EFFECT: improved reliability of control. 2 cl, 5 dwg