SU1377837A1 - D.c.heteropolar voltage pulsed stabilizer - Google Patents

Abstract

The invention relates to electrical engineering and can be used in power supplies with differential load. The purpose of the invention is reliability. When one of the stabilizer outputs is short-circuited, the control of the comparators 8.9 is blocked, which ensures the inclusion of the optocouplers 12,13 ,. This causes a breakdown of the control of trigger 17, as a result of which the power switches 18 and 19 1 are locked,

Description

with

00 with -vl

one

The invention relates to electrical engineering and can be used in power supplies with differential load.

The purpose of the invention is reliability.

The drawing shows the basic electrical circuit impulse1377837

capacitors 1 and 2 are measured by a voltage divider 4. When the measured voltage becomes slightly more than twice the stabilization voltage of a positive polarity, the comparator 9 and the optocoupler 13 are triggered, which brings the control trigger 17 to the initial state, and

constant stabilizer of various JQs, the work cycle is repeated. Due to

polar stress

The stabilizer contains two output capacitors 1 and 2, the first 3 and second 4 dividers of the output voltage, the source 5 of the reference voltage, the extraordinary diodes 6 and 7, the first 8 and the second 9 comparators, different output pins 10 and 11, optocouplers 12 and 13, which are the load of comparators 8 and 9, switch on node 14, two 20 almost simultaneous closures

triggering switches 15 and 16, control trigger 17, two power transistor switches 18 and 19, a power transformer

20 with two primary 21 and 22 and two, secondary 23 and 24 windings, two 25 additional voltage dividers 25 and 26, a summing node 27, two additional switches 28 and 29, which are connected in a shunt manner to the inputs of the comparators 8 and 9.

Pulse stabilizator works as follows

At the first moment of time, the switch-on unit 14 provides unlocking of the starting keys 15 and 16, which switch the control trigger 17 into the autogenerator mode of operation, while alternately unlocking and locking the transistor switches 18 and 19 cause the appearance of the input windings

21 and 22 of a rectangular-shaped power transformer 20, which is converted into alternating voltage on the output windings 23 and 24 of the power transformer 20 The rectified voltage through the rectifying diodes 6 and 7 is fed to the output capacitors 1 and 2, the output voltage is positive polarity is measured by the voltage divider 3, compared with the voltage of the reference source 5 at the comparator, which, when activated, locks the optocoupler 12, which translates the control trigger

17 to a new stable position, in which another transistor switch 19o opens. At the same time, the voltage on the output capacitor 2 rises. The sum of the output voltages and the holding of both transistor switches and protects the stabilizer from a short circuit on the positive output. In the event of a short circuit across the negative wave, the discharge capacitor 2 is discharged, as a result of which the voltage on the divider 26 drops, and on the divider 25 remains unchanged, so that at the output of the adder 27 there appears a positive potential that the transistors 28 and 29 unlock, and they, bypassing the comparators 8 and 9, cause the optocoupler to turn off the optics, from 12 and 13 simultaneously, which causes the transistor switches 18 and 19 to be turned off. In the event of a short circuit on two outputs, the srabat process simultaneously Ani protection similar to the process at short circuit at the positive output

Due to the introduced means, the reliability is improved, since protection against the short circuit of any of the outputs of the stabilizer and against the short circuit of the different polar outputs is provided.

40

45

50

Claims (1)

Invention Formula A switching voltage regulator with a constant voltage, co-holding two output capacitors, two voltage dividers, a reference voltage source, two rectifying diodes, two comparators, a power transformer with two primary and two secondary windings, two switching optocouplers , two triggering keys, switch-on node, control When the input of the adder 27 of equal voltages from the dividers 25 and 26, the switching transistors 28 and 29 are locked and do not affect the operation of the stabilizer. In the case of the occurrence of a short amycan at the positive output, simultaneous provision of both optocouplers 12 and 13 occurs, which causes an almost simultaneous 30 25 pyranium of both transistor switches and provides protection of the stabilizer against short-circuits on the positive output. In the event of a short circuit across the negative wave, the discharge capacitor 2 is discharged, as a result of which the voltage on the divider 26 drops, and on the divider 25 remains unchanged, so that at the output of the adder 27 there appears a positive potential that the transistors 28 and 29 unlock, and they, bypassing the comparators 8 and 9, cause the optrons 12 and 13 to turn off at the same time, which causes the transistor switches 18 and 19 to turn off. In the event of a short circuit on the two outputs, the process Ani protection is similar to the process when a short circuit on the positive output Due to the introduced means, the reliability is improved, since protection against the short circuit of any of the outputs of the stabilizer and against the short circuit of the different polar outputs is provided. 0 five 0 Invention Formula A switching voltage regulator with a constant voltage, co-holding two output capacitors, two voltage dividers, a reference voltage source, two rectifying diodes, two comparators, a power transformer with two primary and two secondary windings, two switching optocouplers , two triggering keys, switch-on node, control trigger, while the switching node is connected in parallel to the input pins, its outputs are connected via two trigger keys separately to the power inputs of the control trigger, the outputs of which are separately connected to the inputs of two transistor switches connected by emitters to one of the input pins, and collectors through the primary windings of the power transformer - to another input terminal; the secondary windings of the power transformer are connected in series through rectifying diodes connected to the series of The connected output capacitors, the common outputs of the secondary windings and the output capacitors are connected to a common output bus, parallel to the output terminals of the positive polarity are connected a voltage source and the first voltage divider, the outputs connected separately to the inputs of the first comparator, the outputs the reference voltage source and the second voltage divider connected between the opposite-polarity output pins are separately connected to the inputs of the second comparator; the photosensors of the optocouplers are connected to the load circuits of the comparators; This is due to the fact that, in order to increase reliability, two additional voltage dividers are introduced in it, each of which is connected between one of the output pins and the common oh summiruyupr1y node connected to the outputs of nx additional voltage dividers and additional keys, the gate inputs connected to the output of the summing node, and blocking control outputs connected to inputs of comparators connected to the output of the reference voltage source.