SU1456941A1 - Bipolar d.c. voltage stabilizer - Google Patents

Abstract

The invention relates to electrical engineering, in particular to secondary power sources, and can be used to power various radio-electric. throne equipment. The goal is to increase reliability and efficiency, to protect the load from the asymmetry of the power supplies. The device contains control transistors 1,2, power sources 3, 4, current limiters 5,6, matching transistors 9,10, current-stabilizing two-terminal 11,12, power-amplifying nodes 13,14,

Description

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DC amplifier 16 and a resistive divider 17. During normal operation, the stabilizer at the output resis-. Voltage divider 17 is equal to zero, so the output of DC amplifier 16 will also maintain a zero voltage, and the output terminals - nominal voltage, - In case of an accident, such as a short circuit of output 8, the output of the divide1

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The invention relates to electrical engineering, in particular, to secondary sources of electrical power, and power supply of various electronic equipment can be used.

The purpose of the invention is to increase the reliability and efficiency of the load protection from the asymmetry of the supply voltage.

The drawing shows an electrical schematic diagram of a two-pole direct current voltage regulator.

The stabilizer contains the first 1 and second 2 control transistors, the collectors of which are connected to the power sources of positive 3 and negative 4 polarities, the emitters through the first 5 and second 6 current limiters are connected to the output terminals of the positive 1 and negative 8 polarities, the first 9 and 10 second matching transistors, the collectors of which are connected to the bases of transistors 1 and 2, and through the first 11 and second 12. current stabilization of the bipolar circuits with the collectors of transistors 1 and 2, respectively, the first 13 and second 14 amplifiers -output nodes, the first inputs of which are connected to the common bus 15, the second are connected respectively to the output 7 and 8, and the outputs from the bases of transistors 9 and 10, respectively, the DC amplifier 16, the inverting input of which is connected to the output of the resistive a divider 17 connected between, pins 7 and 8, a non-inverting input is connected to a common bus 15, and the output is connected to the emitters of transistors 9 and 10,

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of the body 17 by a Vits voltage of positive polarity, and at the output of a DC amplifier 16 is negative polarity. The last voltage will keep the transistor 9 in an open state, the transistor 1 will close and the output voltage of a positive polarity will decrease to safe level, 1 silt,

The stabilizer operates as follows. Under normal operation, the voltage at the output of the resistive voltage divider 17 is zero, therefore the voltage at the output of the 16 DC amplifier is also zero, and the stabilizer maintains the nominal values of the output, voltage,

- in the event of emergency conditions, for example, short or output 8 to the common bus 15, the stabilizer works as follows. To the inverting input of the amplifier

16 DC current is supplied with a positive voltage, and at its output appears negative, which leads to the opening of the transistor 9, the closing of the transistor 1 and a decrease in

output voltage of positive polarity. The amplifier / power node 13 tends to maintain the voltage at the same level by closing the transistor 9, and therefore the voltage at its input decreases to zero. But due to the negative voltage at the output of the dc 16 amplifier, the transistor 9 is kept in the open state, and

the output voltage of the positive polarity decreases. To keep the transistor 9 in open state, its emitter must have a voltage of minus 0.7, -0.8, At

the gain factor K of the amplifier 16 is constant, for example, 100, and the transfer coefficient of the resistive divider 17, equal to 0.5, the output voltage is positive, the field in emergency mode is equal to

 one.

Too-0.5 16) mV.

Such a positive polarity voltage in the absence of a negative polarity voltage is insufficient to reliably protect the load from the asymmetry of the supply voltages. In this case, there is also no overcurrent of the amplification-selective node, and the current, through the transistor 9 and the DC amplifier 16, is limited by a current-stabilizing two-pole device,

Ф о рмула will invent е-н and

A two-pole DC voltage regulator containing the first and second control transistors, the collectors of which are connected respectively to the positive and negative power sources. polarity, and the zmitters through the first and second current limiters - to

the output pins of positive and negative polarity, respectively, the first and second matching tractors, the collectors of which are connected to the bases, and through the first and second current-stabilizing two-poles are connected to the collectors, respectively. first and second control transistors, the first and second amplifier-extrusive nodes, the first inputs of which are connected to the common bus, the second inputs to the output pins of positive and negative polarity, respectively, and the outputs to the bases of the first and second matching transistors, respectively, the output a resistive divider, distinguished by the fact that, in order to increase the reliability and efficiency of protecting the load from the asymmetry of the supply voltage, a DC amplifier is inserted into it, the output of which is connected to em Itters of matching transistors, the inverting input - with the output of the output resistive divider, and non-inverted input is connected to the common bus.

Claims (1)

Claim A bipolar DC voltage stabilizer containing the first and second control transistors, the collectors of which are connected respectively to the positive and negative - power supplies. polarity, and emitters through the first and second current limiters to the output terminals of positive and negative polarity, respectively, the first and second matching tractors ₅ , the collectors of which are connected to the bases, and through the first and second current-stabilizing two-terminal devices are connected to the collectors, respectively. Only the first and second control transistors, the first and second amplifying-detecting nodes, the first inputs of which are connected to a common bus, the second inputs to the output terminals of positive and negative 15 polarity, respectively, and the outputs to the bases of the first and second matching transistors, respectively, an output resistive divider, characterized in that, in order to increase the reliability and efficiency of protecting the load from the asymmetry of the supply voltage, a DC amplifier is inserted into it, the output of which is connected to emitters of matching transistors, an inverting input with an output of an output resistive divider, and a non-inverting input connected to a common bus.