SECONDARY POWER SUPPLY Russian patent published in 2006 - IPC H02M7/217 G05F1/10 H02H3/26 

FIELD: electrical engineering; ac-to-dc voltage converters affording load protection against surges occurring in ac voltage supplies.

SUBSTANCE: proposed secondary power supply has diode rectifier bridge 4 with LC ripple filter 5 connected to its outputs, and load 6. First input of diode rectifier bridge 4 is connected to output of first regulation unit 2 whose input is connected to one of poles of ac voltage supply 1. Newly introduced is second regulation unit 3 whose input is connected to other pole of ac voltage supply 1 and output, to second input of diode rectifier bridge 4. First and second regulation units 2 and 3 incorporate group of N series-connected transistor switches 8.1 through 8N, control resistors 7.1 through 7.N, voltage regulator diodes 9, 14, 18, 21, capacitors 10, 17, resistors 11, 12, closing and opening MIS transistors 13 and 15, respectively, and diodes 19, 20.

EFFECT: enhanced speed of response of protective gear.

2 cl, 1 dwg