SYNCHRONIZING PULSE FORMER Russian patent published in 1998 - IPC

FIELD: electronic engineering. SUBSTANCE: synchronizing pulse former has instrument transformer, comparator, two diodes, rectifier, RS trigger, and former of pulses by leading and trailing edges of square pulses. Instrument transformer output is connected to comparator input. Output of comparator is in its turn connected to inputs of first and second diodes. First diode output is connected to input S, and second diode output is connected to input R of RS trigger through rectifier. RS trigger output is connected to input of former of pulses by leading and trailing edges of square pulses. Pulse former output serves as device output. Pulse former operates every half-period only at moment when transformer voltage passes through zero. It does not respond to all subsequent distortions of input signal, caused by switching, to half-period end. Experimental tests of pulse former indicated that in the course of its monthly operation on ВЛ80Р electric locomotive faults and failures were revealed, and static and dynamic errors were close to zero. EFFECT: higher reliability in operation. 2 dwg