SYNCHRONIZING PULSE FORMER Russian patent published in 1998 - IPC

FIELD: electronic engineering. SUBSTANCE: synchronizing pulse former has instrument transformer, rectifier, Wien rejection filter, adder, amplifier-limiter, and former of pulses by leading and trailing edges. Instrument transformer output is connected to Wien rejection filter and to first input of adder. Output of Wien rejection filter is connected to second input of adder, output of which is connected to series- connected amplifier-limiter, rectifier and former of puses by leading and trailing edges, output of which serves as device output. Pulse former operates every half-period only at moment when transformer voltage passes through zero. It does not respond to input signal distortions caused by switching. Experimental tests of pulse former indicated that in the course of its monthly operation on DK65 electric locomotive no faults and failures were revealed, and static and dynamic errors were close to zero. EFFECT: enhanced reliability in operation. 2 dwg