DEVICE TRANSFORMING ALTERNATE VOLTAGE TO ADJUSTABLE RECTIFIED VOLTAGE Russian patent published in 2002 - IPC

FIELD: electrical engineering, controlled rectifying plants with smooth adjustment of average value of rectified voltage across active-inductive load. SUBSTANCE: device transforming alternate voltage to adjustable rectified voltage has source of alternating voltage, full-wave rectifying bridge, unidirectional controlled key, ripple filter with load resistor across output, phase-pulse control circuit, second unidirectional key, first and second groups of thyristors, diodes and capacitors. Capacitors and diodes in each group are connected in series circuits which common points are connected to anodes of transistors, rest of leads of capacitors in both groups are tied up together in one point and are connected to negative lead of full-wave rectifying bridge. Anodes of diodes in each group are tied up and connected correspondingly to cathodes of first and second unidirectional keys which anodes are tied up in one point and are connected via choke to positive lead of full-wave rectifying bridge. Cathodes of thyristors in both groups are tied up together in one point and are connected to input of ripple filter. Control leads of first and second unidirectional keys and control leads of all transistors in both groups are connected to output of circuit of phase-pulse control which input is connected to output of source of alternating voltage. EFFECT: reduced pulsation of rectified voltage. 2 dwg