FIELD: power electronics.
SUBSTANCE: invention relates to power electronics, in particular to secondary power supply devices with redundancy, and can be used for uninterrupted power supply with constant stabilized voltage of consumers of various radioelectronic objects from two independent DC lines. Device comprises first (1) and second (2) inputs for connection of main and backup DC power supply lines, first (3) and second (4) auxiliary power sources, backup capacitive accumulator (5), first (6) power stage and second (7) power stage, first (8) current sensor, second (9) current sensor, control circuit (10) connected to auxiliary sources (3) and (4), power stages (6) and (7) and current sensors (8), (9) and equipped with digital interfaces, as well as output (11) for connection of consumer. First (3) auxiliary source is designed to provide power supply to control circuit (10), second (4) auxiliary source – for charging backup accumulator (5) and backup power supply of first source (3). Backup accumulator (5) is intended for power supply of first source (3) and power supply via output line (11). Control circuit (10) is configured to stabilize output voltage and uniform distribution of power consumption from the main and backup power supply lines and includes a circuit of protection against excess of input currents (101), driver (102) and microcontroller (103) configured to generate control signals to driver (102) to control operation of power stages (6) and (7) transistors, signal to enable or disable operation of second source (4), microcontroller (103) readiness signal for operation, which switches input currents (101) protection circuit to the current control mode, wherein circuit (101) enables operation of driver (102).
EFFECT: providing uniform distribution of consumed power from two independent power supply lines with simultaneous stabilization of output voltage of the secondary power supply device.
7 cl, 5 dwg, 2 tbl
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