SU577520A1 - Pulsed voltage stabilizer - Google Patents

Description

one

The invention relates to electrical engineering, namely, to sources of power, or electronic equipment.

A pulsed stabilizer is known, comprising a key regulator, a pulse power amplifier, a differential feedback amplifier, a multivibrator, and an output filter.

The closest in technical essence to the present invention is a device comprising a power regulating transistor connected in series with a smoothing LCD filter and a control consisting of a transistor auto-generator of square-wave pulses with a transformer feedback and a comparison node.

The disadvantages of these devices are the low efficiency and complexity of the stabilizer circuitry.

 The purpose of the invention is to simplify and increase the efficiency of the stabilizer.

The goal is achieved by the fact that in a pulse voltage regulator containing a power regulating transistor connected in series with a smoothing LCD filter and a control consisting of a trans2

a rectangular pulse oscillator with transformer feedback and a reference node, a collector winding of a transformer to turn on the power regulating transistor is connected to one of the arms of an additionally introduced output voltage divider, and another collector winding to turn off the power regulating transistor is connected to the output of the comparison node.

The drawing shows a circuit voltage pulse stabilizer.

The device contains a sipovoy transistor connected by an emitter to the negative input aajimu, and co-reflector - to the filter choke; control winding 2 by a power transistor connected to the eglitter and the base of the transistor 1 through a current-carrying resistor; feedback windings 3 and 3 of the oscillator; collector windings 5 and 6, connected to the comparison circuit; transistors 7 and 8 of the oscillator; choke 9 smoothing LCD filter; a capacitor 10 C1 of a live LCD filter; diode 1J smoothing LCD - filter, turn on in the opposite direction; a stabilizer of the comparison circuit 12; resistors 13, 14 and 15 of the comparison circuit; current limiting resistor 16; resistor 17 and stabilizer trigger button 18; control authority 19. The circuit operates as follows. When a supply voltage is applied to the stabilizer output via a stabilizer 12, a current is flowing limited by a resistor 13. A supporting voltage is applied to the zener diode 12, which is applied to the junction collector of the closed transistor having the highest resistance in a series circuit consisting of a winding 5, a transformer, an auto-oscillator , the transistor 7, the resistor 15. The transistor 1 at the time of switching on the supply voltage will be closed, since there is no unlocking pulse at its base, therefore, the output is stable of the strainer he will also be absent. To start the oscillator, consisting of transistors 7 and 8, reverse connection windings 3,4 and collector windings 5 and 6, button 18 with current limiting resistor 17 serves. When briefly pressing the button 18, the input voltage applies a collector to the junction The emitter of the closed transistor 8 is connected to a circuit consisting of resistors 17, 14, a collector winding 6 and a transistor 8, and also with a reverse sign to the transistor 7. The latter will be under a voltage equal to. where UT is the voltage across the collector-emitter junction of transistor 7; Uon is the reference voltage of Zener diode 12; - input supply voltage. Since the transistor 8 is under the voltage 1G-d, and the transistor 7 under the voltage of 1 / o, different initial currents of collectors flow to y. Such asymmetry in the initial currents of the collector contributes to the excitation of the auto generator and the appearance of the pulsing pulse on the transistor 1. Transistor 1 opens and supplies the supply voltage to the shoulders of the autogenerator. Thus, the first shoulder of the auto-oscillator, formed by the transistor 8 and the winding 6, is connected to the output for the second voltage — the transistor and the winding 5 — to the difference between the reference and the output (Uon-Ogy). Considering the oscillator circuit to be symmetrical, the pulse durations / generated by each of the oscillator arms are equal to 5. 4 I and - mt 2 n o l lx x J where K is the coefficient of potential ratio of the pulse filling factor for the beam as transponder pulses 1, generated shoulder of the autogenerator on the searchor 8, expressed as i24, i, k / (and „- - and,). to / and ,; and „„ According to this expression, it is clear that the duration of the unlocking pulses is inversely proportional to the output voltage, when the oscillator frequency of the autogenerator is constant, since, is conbi. Consequently, the output of the stabilizer will maintain the voltage with the required accuracy. The use of an oscillator with a variable duty cycle of control pulses will allow refusing from an additional device for pulse-width molly (magnetic amplifiers), which will simplify the stabilizer circuit, reduce losses in it and increase efficiency. The dignity of this equipment should also include its self-defense against short circuits at the output. When the output circuit is short-circuited in the generator, the voltage inversion is interrupted, which leads to the locking of the power transistor 1. The entire input transducer falls on the emitter-switching circuit of the Transistor L. Formula of the ia-pulse Current voltage pulse generator containing a power pe; i scattering Ti-aH resistor connected in series with a smoothing LCD filter, and a control unit, which is made of a granistor autogenerator of rectangular pulses with transformer feedback and a node and compared to Considering that, in order to simplify and increase the efficiency, the collector winding of the transformer to turn on the power regulating transistor is connected to one of the shoulders of the additionally introduced output voltage divider, and the other to An electrolytic winding for turning off the power regulating transistor is connected to the output of the reference node. Sources of information taken into account in the examination: 1. Copyright certificate f 294134. MKI Q 05 f 1 / 56.1969 2. Author's certificate number 283320, MKI H 02 W 7/68, 1969.

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