| 摘要 |
FIELD: electrical engineering; secondary power supplies for home-made radio-electronic equipment. ^ SUBSTANCE: proposed redundant dc power supply has input terminals 1, 2 connected to ac power supply and used as channel inputs of regulated voltage converters; each channel incorporates power amplifier 3 whose inputs are connected to channel inputs and output, to primary winding of transformer 4 whose secondary winding extreme leads are connected to input of power rectifier 5; ripple filter 6 has its inputs connected to output of power rectifier 5 and to center tap of secondary winding of transformer 4; first lead is connected to first lead of voltage divided built around resistors 7, 8 and to anode of decoupling diode 9; second lead is connected to second lead of voltage divider and to second output of channel; cathode of decoupling diode 9 is connected to first output of channel and central lead of voltage divider, to first control input of control unit 10 whose first output is connected to first control input of power amplifier 3 and second output, to second control input of power rectifier 3; each channel also has rectifier diode 11, filtering circuit 12, error amplifier, and cutoff diode 14; input of rectifier diode 11 of each channel is connected to one of extreme leads of transformer secondary winding; output of rectifier diode 11 is connected to input of filtering circuit 12; output of filtering circuit of each channel is connected to first input of error amplifier 13 of first channel and to second input of error amplifier of second channel; output of filtering circuit 12 of second channel is connected to first input of error amplifier 13 of second channel and to second input of error amplifier 13 of first channel; output of error amplifier of each channel is connected through cutoff diode 14 to second control input of control unit 10 of respective channel. ^ EFFECT: enhanced quality of supply voltage. ^ 4 cl, 1 dwg |
