SU1376071A1 - D.c. voltage compensating stabilizer - Google Patents

Abstract

The invention relates to electrical engineering, namely to stabilizers with protection. The goal is to increase the reliability of operation by eliminating the false alarms of the protection node; for this purpose, a diode, a field effect transistor, a variable resistor and a capacitor are inserted into the device. They are switched on in such a way that when the stabilizer reaches the operating mode, the current of the two-pole device with non-linear current-voltage characteristic does not flow through the light source, but through the field effect transistor, which is in the open state during the exit time. a bilizator on an operating mode. 1 il.

Description

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1137607

The invention relates to electrical engineering, in particular, to compensatory DC voltage stabilizers with protection used in power supply devices for electrical and radio equipment.

The purpose of the invention is to increase the reliability of operation by eliminating the false alarms of the protection node. YU

The drawing shows a DC compensating voltage regulator.

The stabilizer contains a series regulating element 1, the measuring and amplifying node 2 of the feedback circuit with a collector load in the form of a transistor tokostabi

13, the source of which is connected to the common bus 7.

The stabilizer works as follows.

When the stabilizer reaches the operating mode, the output voltage increases gradually and through the capacitor 12 is applied to the gate of the transistor 13 and opens it. As the output voltage of the stabilizer increases, the transistor. 13 remains open, and the operating point of the two-terminal 11 moves in sections with positive and negative conductivity. In this case, the current of the two-terminal 11 flows not through the light source, but through the open transistor 13.

After establishing the working mode

lysing two-terminal 3, emitter-20 mA stabilizer transistor 13, the zakazny resistor and the cathode of the diode of which is connected directly to the input bus 4, the current overload sensor 5 connected between the input bus 4 and

is broken, and the operating point of the two-terminal 11 reaches a point corresponding to the voltage of the minimum current. If at the exit of the stabilizer on

the input of the regulating element 1, the node 25 operating mode, the output voltage

6 protection on an optoelectronic device, the photodetector of which is made on a unijunction transistor, in which the emitter is connected to the connection point of the regulating element 1 and current overload sensor 5, the first base is connected to the emitter of the current-stabilizing two-pole transistor, the second base is to the common bus 7, and the source light by the cathode through a series-connected Zener diode 8 and a resistor 9 is connected to the output of the regulating element 1, and the anode to the common head 7, the resistor 10, two-terminal 11 with a nonlinear current-voltage characteristic, with consisting of two source-connected field-effect transistors, in which the connection point of the drain of the transistor with the p-channel with the gate of the transistor with the n-channel together with one of the plates of the capacitor 12 is connected to the output of the regulating element 1, the connection point of the drain of the transistor with the p-channel with the gate transistor with a p-channel connected directly to the drain. field-effect transistor 13 and through a resistor 10 to the cathode of the diode 14, the anode of which is connected to the cathode of the light source of the optoelectronic device of the protection unit 6, and the second capacitor lining 12 h Res variable resistor 15 is connected to the common bus 7 and directly to a gate of the FET

ma stabilizer transistor 13 zak

is broken, and the operating point of the two-terminal 11 reaches a point corresponding to the voltage of the minimum current. If at the exit of the stabilizer on

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five

If the stabilizer exceeds the nominal value, then the Zener diode 8 pierces and a current flows through the light source of the optoelectronic device of the protection unit 6 and the protection node 6 is activated. In this case, the diode 14 provides current flow not through the open transistor 13, but through the light source of the optoelectronic device of the protection unit 6. After setting the nominal value of the output voltage, the stabilizer works as follows.

If the output voltage is exceeded, the Zener diode 8 breaks through, the current through the light source of the optoelectronic device of the protection unit 6 increases, and reaches the value required to light the light source and, consequently, the protection unit operates.

In the event of a decrease in the output voltage, the current through the two-port 11, as well as through the resistor 10, diode 14, the light source of the optoelectronic device of the protection unit 6 increases and reaches the value required to light the light source, and consequently, the protection unit trips. The stabilizer is adjusted as follows.

By adjusting the overcurrent sensor 5, the allowable load current is set. Resistors 9 and 10 us5

0

five

respectively, the values of the applied and undervoltage, at which the protection node operates, and the resistor 15 set the parameters of the chain - capacitor 12, resistor 15, at which transistor 13 is in open state | Work mode.

The DC voltage stabilizer possesses high reliability in operation by eliminating the false alarms of the protection unit when the operating mode is reached, which allows to improve the operating characteristics of the stabilizer.

The inventive compensation DC voltage regulator containing a serial regulating element, a measuring and amplifying feedback circuit node with a collector load in the form of a transistor current stabilizing two-pole, the emitting resistor and the cathode of which is connected to the input bus, current overload sensor connected between the input bus and the input of the regulating element, protection node on the optoelectronic device, the photodetector of which is made on a single junction transistor, Mitter which is connected to the junction .The inputs of a regulating member and overcurrent sensor, the first base - to the emitter of transistor tokostabilizi

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15

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25

thirty

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the second two-pole network, the second base is connected to the common bus, and the cathode LED connects through a series-connected zener diode and a resistor to the output of the regulating element, and an anode to the common bus, a resistor and a two-pole with a nonlinear current-voltage characteristic, consisting of two with combined field sources transistors, the connection point - the drain of the transistor with the p-channel with the gate of the transistor with the p-channel is the first output of the bipolar circuit, and the connection point of the drain of the transistor with the p-channel with the gate of the transistor from the p-channel ohm is the second two-pole output, characterized in that, in order to increase reliability by eliminating spurious triggers of the protection node, a diode, a field effect transistor, a variable resistor and a capacitor are inserted into it, while the output of the two-pole with nonlinear is connected to the output of the regulating element volt-ampere characteristic and one of the capacitor plates, the other of which is connected via a variable resistor to the common bus and to the gate of the field-effect transistor, the source of which is connected to the common bus, and the drain - to the second output of a two-pole device with a non-linear current-voltage characteristic and through a resistor to the cathode of the diode, the anode of which is connected to the cathode of the LED of the optoelectronic device of the protection node.

Claims (1)

DETAILED DESCRIPTION OF THE INVENTION A compensating DC voltage stabilizer comprising a series regulating element, a measuring-amplifying feedback loop assembly with a collector load in the form of a transistor current-25 stabilizing two-terminal device, the emitter resistor and diode cathode of which are connected to the input bus, current overload sensor connected between the input bus and the input of the regulatory element, the protection node on the optoelectronic device, the photodetector of which is made on a single junction transistor, emi whose tter is connected to the connection point of the input of the regulating element and the current overload sensor, the first base is the current stabilization by the η-channel with the trans-p-channel shutter, which is the second two-terminal, so that with the aim of two-terminal, the second base to the common bus, and the LED by the cathode through the zener diode and resistor connected in series is connected to the output of the regulating element, and the anode to the common bus, the resistor and two-terminal with a non-linear current-voltage characteristic, consisting of two displaced sources of field-effect transistors, and the drain-transistor connection point with the p-channel with the gate of the transistor with the p-channel is the first output of a two-terminal network, and the drain connection point of the transistor transistor with the output of the reliable operation by eliminating false positives of the protection node, in a diode, a field effect transistor, a variable resistor and a capacitor are introduced, while the first output of a two-terminal with a non-linear current-voltage characteristic and one of the capacitor plates are connected to the output of the regulating element, d whose other lining is through a variable! the resistor is connected to the common bus and to the gate of the field-effect transistor, the source of which is connected to the common bus, and the drain to the second terminal of a two-terminal with a non-linear current-voltage characteristic and through the resistor to the diode cathode 35, the anode of which is connected to the LED cathode of the optoelectronic device of the protection unit . from