SU712816A1 - Dc voltage pulsed stabilizer - Google Patents

Description

The main stabilizer and equilibrium voltage is shown in the drawing.

The stabilizer contains a pulse width modulator 1 consisting of an amplifier 2, a mismatch, a comparator 3, a generator 4, a sawtooth voltage, a generator 5 of modulating rectangular pulses, and 2I – HE 6, 7; push-pull power amplifier 5 of the control signal — with a transformer output, driver 9, a control pulse, consisting of a diode bridge JO and a smoothing capacitor 1.1; resistors 12, key regulating transistor 14 and) /. C-filter 75.

From the output of the IMPulse voltage stabilizer, the feedback signal is supplied to the pulse-width modulator /, to one of the inputs of the error amplifier 2, to the second input of which the reference voltage is applied. The error signal is fed to the comparator 3 for comparison with the lilac voltage from the generator 4 of the sawtooth voltage, which is triggered by synchronization pulses. From the comparator 3, a pulsed signal arrives at the 2I – NE 6 circuit to modulate its signals from the generator 5 modulating right angle pulses. Modulated and amplified from the circuit 2I-HE 6, it is fed to the base of the transistor of one of the arms of the push-pull power amplifier 8, to the second arm of which a signal is fed in antiphase. Phase failure implements the second circuit 2I-HE 7.

In order to facilitate the operation of the push-pull power amplifier 8, the transistors of both its arms are closed during a pause of the control pulse with a high level from the omnator 3.

 Tips 6, 7 perform fznktsiya 2I - NOT on the NIZ-KIM levels.

With the introduction of modulating rectangular pulses, the transistors of the push-pull power amplifier of the control signal operate in a switching mode with a duty cycle of two (square wave), and there are no special requirements for their saturation factor, the requirements for the transformer 8 of the amplifier are also reduced.

The modulated control signal from the secondary winding of the transformer of the push-pull power amplifier is fed to the driver 9 of the control pulses, where it is reconstructed by a diode bridge 10. A capacitor is used to smooth the pulsations arising from the rectification of rectangular pulses.

/; /. The generated control pulse through the resistor 12 is applied to the control input (base-emitter) of the key transistor 14. Resistor 12 reduces the effect

the spread of the input circuit of the transistor 14 on the mode of its operation. The resistor 13 serves to discharge the capacitor 11 during the pause of the control pulse.

Input Voltage Switched

key transistor 14 is supplied to

smoothing) Z, C-filter 15, exit

which is the output of the stabilizer.

The positive effect of the invention

is to increase reliability n

expanding the range of load current regulation by introducing a modulating pulse generator and a driver for controlling pulses.

Claims (2)

1. USSR author's certificate number 548850, cl. G 05 F 1/56, 1975. 2. US patent number 4030015, cl. 321-2, 1975. -ill Support voltage impulses sync.