SU1479923A1 - Bipolar dc stabilizer - Google Patents

Abstract

The invention relates to electrical engineering and can be used in the secondary power supply systems of various electronic devices. The purpose of the invention is the simultaneous shutdown of both stabilization channels in case of overload or short circuit in one of the channels. The goal is achieved by using as the source of the reference voltage of the measuring and amplifying node 6 of the negative channel the output voltage of the positive channel while simultaneously controlling the protective transistors 10, 11 of the voltage on the respective current sensors 3, 4 of the positive and negative channels. When one of the channels is overloaded, the protection transistor 10 or 11 controls the power transistor of the regulating element 1, the locking of which leads to a decrease in the output voltage of the positive channel, resulting in a decrease in the voltage of the negative channel. 1 il.

Description

(21) 4301616 / 24-07

(22) 08.09.87

(46) 05/15/89. Bul N 18 (72) V.A. Sergeev

(53) 621.316.722.1 (088.8)

(56) Dodik S.D. DC semiconductor voltage regulators (continuous regulation), M : Sov.radio, 1980, 2nd ed. revised and enlarged, p.300, fig. 11.1.

USSR Author's Certificate No. 754394, cl. G 05 F 1/585, 1980.

(54) TWO-POLAR STABILIZER OF CONSTANT VOLTAGE

(57) The invention relates to electrical engineering and can be used.

in systems of secondary power supply of various electronic devices. The purpose of the invention is the simultaneous shutdown of both stabilization channels in case of overload or short circuit in one of the channels. The goal is achieved by using the negative voltage channel of the output channel of the positive channel as the source of the reference voltage of the measuring and amplifying node 6 with simultaneous control of the protective transistors 10, 11 of the voltage on the respective sensors 3.4 of the current of the positive and negative channels. When one of the channels is overloaded, the protection transistor 10 or 11 controls the power transistor of the regulating element 1, the locking of which leads to a decrease in the output voltage of the positive channel, resulting in a decrease in the voltage of the negative channel. 1 il.

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The invention relates to electrical engineering and can be used in the secondary power supply systems of various electronic devices.

The purpose of the invention is the simultaneous shutdown of both stabilization channels in case of overload or short circuit in one of the channels.

The drawing shows a diagram of a two-pole DC voltage regulator.

A two-pole DC voltage regulator contains two stabilization channels of different polarity, each of which is CQCTOHT of the connecting element 1 (2) connected in series to the pei power bus, made on a composite transistor, current sensor 3 (4) and measuring and amplifying node 5 (6) feedback, the output of which is connected to the control input of the regulating element 1 (2), the output terminals 7 and 8, the output of the common bus 9, the protection transistors 10 and 11 and the resistive dividers 12 and 13 of the voltage.

In the positive stabilization channel, the emitter of the protection transistor 10 is connected to one of the current sensor 3 terminals and to the output terminal 7, the base is connected to the midpoint of the voltage divider 12, the collector is connected to the control input of the regulating element 1, and the reference input is measured -amplifier node 5 with respect to the common bus 9 is connected to a voltage source, in the negative stabilization channel the emitter of the protection transistor 11 is connected to the midpoint of the voltage divider 13, the base is connected to one of the current sensor 4 terminals and to the output one terminal 8, the collector - to the control input of the regulating element 1 of the stabilization channel of the opposite sign, to the output terminal 7 of which the reference and measuring input of the measuring and amplifying node 6 are connected.

The bipolar constant voltage regulator operates as follows.

In operating modes, the transistor 10 (11) is closed. When overloaded or short-circuited in the positive polarity channel on the current sensor 3, the voltage drop increases, which, when the threshold is reached, opens the protective transistor 10, which starts to shunt the emitter junction of the regulating element 1. In this case, the output voltages and load current reduced in proportion to the decrease in load resistance. The magnitude of the negative output voltage decreases simultaneously with the decrease in the positive output voltage, as it will measure A negative channel amplifier and amplifier node monitors the change in the output voltage of the positive channel.

If an overload or short circuit occurs in the negative voltage channel, the protective transistor 11 opens and shunts the emitter junction of the regulating element 1, which starts to close, which leads to a decrease in the voltage in the channel of positive polarity and contributes to closing the negative channel, resulting in the output voltages of both channels and the load current decrease.

In this way, protection against overloads and short circuits is simultaneously triggered in two channels of the stabilizer when an overload or short circuit occurs simultaneously in two channels of the stabilizer when an overload or short circuit occurs in one of them.

Claims (1)

Invention Formula A two-pole DC voltage regulator containing two stabilization channels of different polarity, each of which consists of a control element connected in series to the power bus, made on the power and matching transistors and a resistive current sensor, a measuring and amplifying feedback unit connected to the output output to the control input of the regulating element, resistive divider connected between the base of the power transistor of the regulating element and the common bus, transistor protection You and the source reference voltage, wherein the positive input of the measuring channel stabilization measuring-amplifier unit is connected on a common bus to the output terminal, the reference input 314799234 the source of the reference voltage, the emitter of stabilization, the emitter of the transistor, the tern of the protection transistor is connected to the protection connected to the midpoint of the output terminal, the base is connected to the voltage divider, the base is connected to the middle point of the resistive divider to the output terminal, the collector to the voltage -control input of the regulating input of the regulating element, the ment of the positive channel, the reference one characterized in that, and the measurement inputs are measuring in order to simultaneously disconnect the amplifier node from The positive of both stabilization channels with re-JQ channels are connected respectively to the load or short circuit in the one-common bus and the output pins are full of channels in the negative power cable and negative channels.