SU857953A1

SU857953A1 - Compensation-type dc voltage stabilizer

Info

Publication number: SU857953A1
Application number: SU792687968A
Authority: SU
Inventors: Владимир Абелевич Гофманас
Original assignee: Предприятие П/Я В-8574
Priority date: 1979-11-23
Filing date: 1979-11-23
Publication date: 1981-08-23

Description

1one

Изобретение относитс к радиотехнике и может быть использовано в источниках питани радиоустройств с повышенной защищенностью от перегрузок .The invention relates to radio engineering and can be used in power supplies of radio devices with increased protection against overloads.

Известен стабилизатор посто нного напр жени , содержащий регулирующий элемент, усилитель обратной св зи и схему сравнени 1.A DC voltage regulator is known, comprising a regulating element, a feedback amplifier, and a comparison circuit 1.

Наиболее близкой к предлагаемому изобретению вл етс компенсационный стабилизатор посто нного напр жени , содержащий два вывода дл подключени к соответствующим источникам входного напр жени , один из которых соединен с выходным выводом через последовательный регулирующий элемент , по цепи управлени подключенный к выходу усилител посто нного тона, один из входов которого подключен через источник опорного напр жени к общей точке, а вывод питани соединен с выводом дл подключени второго источника входного напр жени через дополнительный проходной транзистор , эмиттер которого соединен с верхним плечом делител напр жени на резисторах, причим средн ч точка делител соединена с базой /силительного транзистора, эмиттер которогоClosest to the proposed invention is a DC compensatory stabilizer, which contains two terminals for connection to the corresponding input voltage sources, one of which is connected to the output terminal through a series regulating element, one through the control circuit connected to the output of the DC amplifier. from the inputs of which is connected via a reference voltage source to a common point, and the power output is connected to an output for connecting a second input voltage source through d additionally pass transistor, the emitter of which is connected with the upper shoulder voltage divider resistors, the middle point h of the divider is connected to the base / silitelnogo transistor whose emitter

соединен с выходньм выводом, а коллектор - с базой дополнительного проходного транзистора и с нагрузочным резистором, второй вывод которого подключен к выводу дл подключени второго источника входного напр жени и к коллектору дополнительного проходного транзистора 2 .connected to the output terminal, and the collector to the base of the additional pass-through transistor and to the load resistor, the second end of which is connected to the output to connect the second input voltage source and to the collector of the additional pass-through transistor 2.

Недостатке известного устройства The disadvantage of the known device

10 вл етс отсутствие защиты от перегрузок .10 is the lack of overload protection.

Цель изобретени - повышение надежности путем; защиты стабилизатора от перегрузок.The purpose of the invention is to increase reliability by; stabilizer protection against overload.

1515

Поставленна цель достигаетс тем, что в компенсационном стабилизаторе посто нного напр жени нижнее плечо делител напр жени на резисторах соединено с общей точкой через The goal is achieved by the fact that in the compensating stabilizer of constant voltage the lower arm of the voltage divider on the resistors is connected to a common point through

20 стабилитрюн.20 stablun.

На чертеже представлена принципиальна схема компенсационного стабилизатора посто нного напр жени .The drawing shows a schematic diagram of a constant voltage compensating stabilizer.

Стабилизатор содержит выходной The stabilizer contains the output

Claims

Pin 25 and common point 2, zener diode 3, an amplifying transistor 4, the collector of which is connected to the base of the additional transistor 5 / and the emitter - to one of the inputs of the DC amplifier 6. the output of which is connected to the control circuit of the regulator; 11 its element on the transistor 7 and the other input of the dB amplifier is connected to the source 8 of the reference voltage, the voltage divider 9, the upper arm of which is connected to the emitter of the additional pass-through transistor 5 / and to the common point through Zener diode 3, resistor 10 and input voltage sources I and 12. The compensation voltage regulator works as follows. At a load not exceeding the nominal voltage, the voltage of the output pin 1 relative to the common point 2 is greater than or equal to the stabilization voltage of Zener diode 3; therefore, the latter does not affect the operation of the stabilizer. This follows from the condition of selecting the voltage for stabilizing the zener diode 3 OUT st 1) where Ugjjij, is the output voltage of the stabilizer, taken from output pin 1 relative to common point 2; UCT voltage stabilization of the Zener diode 3. At the time of overload at the output voltage (Ug (y, less than the voltage stabilizing the Zener diode - by an amount equal to the saturation voltage of the transition base-emitter of the amplifying transistor 4 (.g.oc) after saturation Thus, the force of operation of overload protection OUT - UCT Ucr.3 us, where the output voltage of the stabilizer; UCT voltage —stabilization of Zener diode 3 / and, r. In this case, the voltage at the emitter to An additional pass-through transistor 5, and consequently, the output of the power supply of the dc amplifier 6, decreases sharply and becomes equal to the output voltage of the Ufjbni stabilizer. The dc output-amplitude voltage of the dc 6 also decreases sharply, which causes a further decrease through the main pass-through transistor 7 the output voltage of the voltage regulator Vy, and, consequently, the supply voltage of the amplifier 6 DC. An avalanche-like process occurs, as a result of which the output voltage and current of the stabilizer become equal to zero. When the overload is removed, the stabilizer returns to its initial state automatically. Thus, the selection of a zener diode and the corresponding stabilization voltage can be used to set the permissible degree of overload of the compensating voltage regulator. The positive effect is achieved by the fact that when overloaded, when the output voltage decreases to the level of stabilization voltage of the Zener diode, the stabilizer automatically locks as a result of the avalanche-like process. Claims of the DC Voltage Compensation Stabilizer, containing two terminals for connecting to the corresponding input voltage sources, one of which is connected to the output terminal through a series regulating element, connected to the output of the DC amplifier through the control circuit, one of the inputs of which is connected via the source of the reference voltage to the common point, and the output of the power supply is connected to the output for connecting the second source of the input voltage through an additional pass-through transistor p, the amitter of which is connected to the top / shoulder of the voltage divider on the resistors, the middle point of the divider is connected to the base of the amplifying transistor, the emitter of which is connected to the output terminal, and the collector is connected to the base of the additional transistor and to the load resistor, the second output is connected to the output to connect the second input voltage source and to the collector of the additional pass-through transistor, characterized in that, in order to increase reliability by ensuring the protection of the stabilizer against overloads, the lower arm of the voltage divider on the resistors is connected to a common point via a zener diode. Sources of information taken into account in the examination 1. The author's certificate of the USSR 587457, cl. G 05 F 1/56, 1973. 2, USSR Copyright Certificate 499561, cl. G 05 F 1/56, 1973.

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