SU744514A1

SU744514A1 - Pulsed dc voltage stabilizer

Info

Publication number: SU744514A1
Application number: SU782595654A
Authority: SU
Inventors: Валерий Васильевич Чугаев
Original assignee: Предприятие П/Я Г-4725
Priority date: 1978-03-28
Filing date: 1978-03-28
Publication date: 1980-06-30

Description

1one

Изобретенне относитс к электротехнике и может быть использовано в цеп х питани различной радиотехнической аннаратуры .The invention relates to electrical engineering and can be used in the power supply circuits of various radio engineering annuities.

Известный импульсный стабилизатор посто нного напр жени содержит ключевой элемент и генератор импульсов, св занные с управл емым мультивибратором, фильтр и схему сравнени , подключенные к выходу стабилизатора 1. Устройство, вл ющеес иаиболее близким техническим решением к изобретению, содержит ключевой элемент, включенный в одну из силовых шип между входной клеммой и первым выводом основной обмотки дроссел фильтра, второй вывод которой соединен выходной клеммой, а дополнительна обмотка этого дроссел одним выводом соединена с базой транзистора , узел сравнени , один из входных выводов которого соединен с общей шиной, а выход подключен через узел управлени к заправл ющему входу ключевого элемента 2.The known DC voltage regulator contains a key element and a pulse generator associated with the controlled multivibrator, a filter and a comparison circuit connected to the output of the stabilizer 1. The device, which is the closest technical solution to the invention, contains a key element included in one from the power spike between the input terminal and the first output of the main winding of the throttle filter, the second output of which is connected to the output terminal, and the additional winding of this throttle is connected to one end by base of the transistor, the comparison node, one of the input terminals of which is connected to the common bus, and the output is connected through the control node to the charging input of the key element 2.

Недостатком известных устройств вл етс низкий коэффициент стабилизации.A disadvantage of the known devices is the low coefficient of stabilization.

Целью изобретени вл етс повышение коэффициента стабилизации.The aim of the invention is to increase the stabilization factor.

Поставленна цель достигаетс тем, что в известном импульсном стабилизаторе посто нного напр жени другой вывод дополнительной обмотки дроссел фильтра соединен с эмиттером транзистора, с другим входным выводом узла сравнени и с катодом введенного диода, анод которого подключен к выходной клемме, а коллектор транзистора через резистор соединен с входной клеммой.The goal is achieved by the fact that in a known DC voltage regulator another output of the additional winding of the filter droplet is connected to the emitter of the transistor, to another input terminal of the comparison node and to the cathode of the inserted diode, the anode of which is connected to the output terminal and the collector of the transistor is connected through a resistor with input terminal.

На фиг. 1 дана электрическа схема 10 стабилизатора; на фиг. 2--диаграммы напр жени .FIG. 1 given electrical circuit 10 stabilizer; in fig. 2 - voltage diagrams.

Имнульсный стабилизатор состоит из ключевого элемента 1, генератора 2 импульсов , управл емого мультивибратора 3, дрос15 сел 4 фильтра с дополнительной обмоткой 5, транзнстора 6, разделительного диода 7 н узла 8 сравнени . Генератор 2 импульсов и управл емый мультивибратор 3 образуют узел 9 управлени . Символами t/i, 2, , 20 выхИ f/on обозначены напр жени , форма которых приведена на фиг. 2.The impulse stabilizer consists of a key element 1, a generator of 2 pulses, a controlled multivibrator 3, a drog15 sat down 4 filters with an additional winding 5, a transistor 6, a separating diode 7 n of the comparison node 8. The pulse generator 2 and the controlled multivibrator 3 constitute the control unit 9. The symbols t / i, 2,., 20, and f / on are indicated by voltages, the form of which is shown in FIG. 2

В стабилизаторе имеет место интегральна широтно-импульсна модул ци .Integral pulse width modulation takes place in the stabilizer.

25 Работу стабилизатора достаточно рассмотреть на интервале времени, равном периоду Т следовани импульсов. В интервале от О до Гц (см. фиг. 2, крива 1) происходит процесс разр да хронирующего25 It is enough to consider the operation of the stabilizer on a time interval equal to the period T of impulses following. In the interval from O to Hz (see Fig. 2, curve 1), the discharge of the timing function occurs.

Claims

30 capacitor of the multivibrator with feedback current, which can be described by the expression 1 #, T) where Hl is the threshold value and is determined by the stabilizer parameters (input resistance and gain of the comparison circuit, initial voltage and capacitance of the clock capacitor); oa — linearly related to U uoa, respectively. From expression (1) it follows that the same pulse width (7n const) can be obtained with different values of threshold IIi and regulation error A / 7out-t / on. Moreover, reducing the threshold value leads to a decrease in the At / error and therefore to an increase in the stabilizer gain (stabilization factor). If the regulation error has an alternating character, then in the interval from 0 to Hz only the positive part is integrated (see Fig. 2, curve 2). In this case, the stabilization factor takes the maximum value. In order for the output transistor of the multivibrator not to close at time / 1 (see Fig. 2, dashed curve), when the error AU becomes negative, it is necessary to provide a boost to this transistor. In the known stabilizers, the specified mode is achieved by setting a constant-current mix into the base of the transistor. However, this leads to the fact that the value of P: and, accordingly, the error At / increases, and the stabilization factor decreases. In order to increase the stabilization factor, the secondary winding 5 is smoothed, its throttle 4 is connected to the base-emitter junction of transistor 6, whose collector is connected to the stabilizer input, and the emitter is connected to the input of the comparison node 8 and the cathode of the separation diode 7, the anode of which is connected to the stabilizer output . When opening the key element 1 from the controlled multivibrator 3, a load current flows through the primary winding of the throttles, which helps induce the emf in the secondary winding of the throttles. The negative potential of this EMF is applied to the base, and the positive potential is applied to the emitter of the transistor 6. Transistor 6 is closed, and diode 7 is opened under the action of the output voltage of the stabilizer. Thus, in the interval from O to Hz, the timing of the multivibrator capacitor is discharged by the collector current of the reference node transistor, the shape of which depends only on the output voltage of the stabilizer. When the key element is closed in the secondary winding, the drossel induces a reverse polarity emf, under the action of which the transistor 6 opens and the diode 7 is closed by the input voltage of the stabilizer, which is greater than the output voltage of the stabilizer. According to the invention, an increase in the stabilization factor does not lead to a violation of the stability of the stabilizer, since in the interval from 7 to T the output signal of the multivibrator is determined by a constant voltage at the input of the stabilizer (see Fig. 2, curve 3). By adjusting the parameters, it is possible to obtain negative or positive compensation for unstabilized oscillations of the input voltage. Negative kompensation corresponds to an increase in the output of the stabilizer with an increase in the input. Positive compensation corresponds to a change in voltage in one direction. Pa the border between areas of positive and negative compensation for sushi, there is a mode in which changes in the voltage to be stabilized do not cause voltage changes at the output of the stabilizer. Another advantage of the proposed stabilizer is that the reference node can operate at high output oscillation pulses without violating the electrical strength of the reference transistor and significant non-linear forces. Claims of the Inverter DC voltage regulator containing a key element included in one of the power bus between the input terminal and the first output of the main winding of the filter drossel, the second output of which is connected to the output terminal, and the additional winding of this throttle is connected to one base of the transistor, the comparison node, one of the input terminals of which is connected to the common bus, and the output is connected through the control node to the control input of the key element, characterized in that, in order to increase the coefficients The stabilization patient, another output of the additional winding of the filter Drossel, is connected to the emitter of the transistor, to another input terminal of the comparison node, and to the cathode of the inserted diode, the anode of which is connected to the output terminal, and the collector of the transistor is connected to the input terminal through a resistor. Sources of information taken into account in the examination 1. E. S. Graver. Key DC voltage stabilizers. “Svy, M., 1970, p. 127.

2. USSR author's certificate number 417775, cl. Q 05 F 1/56, 1971.

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