SU1325442A1 - Direct current voltage pulsed stabilizer - Google Patents

Abstract

The invention relates to electrical engineering and can be used in secondary power supply systems. The aim of the invention is to increase reliability. The device is based on a transistor regulating element 1 of the series type, control unit 2, input voltage divider 5, level selector 6, starting capacitor 10, switch 12, load state sensor 15, threshold blocks 7, 8, one of which is installed in the power supply the control unit 2 circuit, and the other between the output of the load state sensor 15 and the control input of the first switch 12, bypassing the starting capacitor 10. By introducing a voltage into the limiting device 11, the second 13 and the third 14 keys and the third thresholds With the corresponding functional connections, block 9 eliminates undesirable overvoltage of the control signal generating unit, eliminates excessive current flow after the protection operation through the level selector and key, shunt the starting capacitor, prevents unwanted output of the stabilizer from action under normal load conditions, but a significant, albeit permissible, decrease in the voltage of the primary power source. 1 il. 5S (L with s ate 4 4 GO

Description

The invention relates to electrical engineering and can be used in secondary power supply systems.

The aim of the invention is to increase reliability.

The drawing presents a functional diagram of a DC voltage regulator.

The device contains a transistor regulating element 1 of the selective type, a control unit 2 with a series-connected control signal generating unit 3 (as a combination of a resistive feedback voltage divider, a reference voltage source, an error signal amplifier, a pulse-width generator modulator with a common supply voltage of 5 V) and an amplifier node 4 (on an operational amplifier with a supply voltage of 27 V in a steady state), a resistive voltage divider 5, di the first level selector 6, the first, second and third threshold blocks 7–9 (the first of which is made with automatic pressing of the threshold element itself after its operation), the starting capacitor 10, the voltage limiter 11, the first, second and third keys 12 14, a load state sensor 15, an input terminal 16 for connecting a primary power source, a common bus 17, and an output terminal 18 for connecting a load.

The input of the forming unit 3 of the control unit of the control unit 2 is connected, relative to the bus (not shown), to the output 18, the output of the amplifying unit 4 of the latter is connected to the control-input of the regulating element 1. The input of the voltage divider 5 is connected to the terminals 16 and 17. One from the inputs of the level selector 6 is connected to the output 18, and the output through the threshold unit 7, to the power input of the amplifier unit 4 of the control unit 2. Starting capacitor 10 and key 12 are connected in parallel at the output of the selector 6 level. The input of the load state sensor 15 is connected to terminals 16 and 18, i.e. to the power terminals of the regulating element 1. The output of the threshold unit 8 is connected to the control input of the key 2. The voltage limiter 11 is connected between the output of the threshold unit 7 and the supply input of the control generation unit 3

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control signals of the control unit 2. The key 13 is connected between the output of the voltage divider 5 and the other input of the selector 6, the level 13 is between the output of the load state sensor 15 and the input of the threshold unit 8. The input of the threshold unit 9 is connected to the output of the voltage divider 5. The control inputs of the keys 13 and 14 are connected to the outputs of the threshold blocks 8 and 9, respectively.

The device works as follows.

With the supply to the output 16 and the bus 17, the voltage from the primary power source through the divider 5 is straight, the normally open key 13 and one of the diodes from the level selector 6 charge the starting capacitor 10. The key 12 is normally closed and does not hinder this process . When reaching voltage on. To the set value capacitor 10, the threshold unit 7 is activated and provides the supply voltage to the control signal generating unit 3 and the amplifier unit 4 of the control unit 2. At the same time, the supply voltage of node 3 remains at a nominal level for the element base used in it, and the supply voltage of node 4 monotonously increases as the starting capacitor 0 is further charged, providing a monotonous (from pulse to pulse) increase in the amplitude of signals at the control input of the regulating element 1 and the gradual (up to nominal) increase of the external voltage of the stabilizer, excluding the starting current bar. With the establishment of the operating mode, the selector 6 level, using its other diode, switches the power supply of the control unit 2 from the output of the voltage divider 5 to the output of the stabilizer.

Sensor: 5 load conditions are made on the basis of the pulse duration integrator on the regulating element 1 with the inverting amplifier cascade. If the device load is less than the nominal, the output signal of the sensor 15 does not exceed the pickup threshold unit 8, in the case of an excessive increase in the load current 5 or a short circuit in the load, the signal at the output of sensor 1 5 increases and transforms the threshold through the normally open key 14 block 8 from one state to another. The latter opens the key

12 and closes the key 13. The key 12 bypasses the starting capacitor 10, removing power from the control unit 2 and thereby closing the regulating element 1. Closing the key 13 prevents current through the selector 6 of the key 12, preventing them from overloading and unnecessary energy consumption. By reducing the load current to the nominal, i.e. after the end of the emergency mode, the threshold unit 8 is reset, the key 12 is closed, the key

13 is opened, the starting capacitor 10 is recharged and the control unit 2 is energized. Control element 1 and the entire stabilizer as a whole return to normal operation.

With a significant but permissible decrease in the voltage of the primary power source, an increase in the duration of the open and a decrease in the duration of the closed state of the regulating element 1 and, as a result, an increase in the output signal of the stabilizer load sensor 15, the stabilizer does not turn off. The output of the voltage divider 5 switches from one state B to another threshold unit 9, and that, in turn, closes the key 14, thereby blocking the switching of the threshold unit 8. Electro nabzhenie consume - Leu maintained.

Due to the level limit

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the power supply of the control signal generating unit 3 is provided with a stable and safe voltage corresponding to the element base of the given node, and, on the other hand, when the stabilizer is put into operation due to a monotonous increase in the amplitude of the sig-; At the exit of the node 4 and the control input of the regulating element G, the start-up throw is prevented. The escape of the regulating element 1 is prevented.

When a current protection is triggered due to an additional blocking, the passage of current from the voltage divider 5 through the level selector 6 and the key 12 is also prevented, i.e. their overload and idle costs are eliminated

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electricity. Due to the introduction of one more blocking, the device is not subject to unjustified disconnections by its protection under normal load conditions, but at the same time a significant and at the same time acceptable reduction of the voltage of the primary power source. These factors increase reliability.

Claims (1)

Invention Formula A DC voltage regulator containing a regulating element connected between the input and output pins, a control unit, which is the junction of the control signal generation unit connected in series, the input of which is connected to the output output, and an amplifying unit whose output is connected to a regulating element, a voltage divider whose input with respect to the common bus is connected to the input terminal, a diode level selector, one of the inputs of which is connected to the output terminal, and the output through the first th threshold unit — with the power input of the amplifying unit of the control unit, connected in parallel to the starting capacitor and the first switch, connected between the output of the level selector and the common bus, the load state sensor, whose inputs are connected separately to the input and output pins, the second threshold a unit whose output is connected to a control of the input of the first key, characterized in that, in order to increase the reliability of operation, a voltage limiter, a second and third keys and a third threshold unit are introduced, and l is connected between the voltage threshold input of the first input unit and the supply unit generating actuating signals of the control unit, the second key - The yields between. the house of the voltage divider and another input of the level selector; the third key is between the output of the load state sensor and the input of the second threshold unit; the input of the third threshold unit is connected to the output of the voltage divider; the control inputs of the second and third keys are connected to the outputs of the second and third, respectively threshold blocks.