SU1166080A1 - A.c.voltage stabilizer - Google Patents

Abstract

VARIABLE VOLTAGE STABILIZER containing a regulating unit with synchronizing and two. control inputs, connected through the input filter to the input terminals, and through the output filter to the output terminals, rectifier, input through the switchgear transformer connected to the output terminals, the comparison node, one input of which is connected to the input of the source of the driving voltage, amplifier, the output of which is connected to the control inputs of the two phase-shifting units, the outputs connected to the corresponding control inputs of the regulator, the measuring transducer and the oscillator, characterized in that , in order to increase operational reliability, a delay node, a key with a lock and a null organ are inserted into it, an output connected to the control input of the key, and an input - to the input terminals where the synchronization input of the generator is also connected, the output of which is through the key t blocked connected to the clock inputs O) of the regulator and two phase shifting nodes; the delay node is connected between the output of the detector and the input of the source of the driving voltage, and the output of the rectifier is connected to another input of the center The output of which is through the measuring O) converter is connected to the input Oi of the amplifier, while the measuring converter about 00 о is designed as a series-connected integrator with zeroing and a memory cell.

Description

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The invention relates to electrical engineering, in particular, to systems for stabilizing alternating voltage, and can be used as a power source for electronic equipment, communication equipment, computer complexes,. electrical installations, especially in those cases where it is necessary to ensure reliable operation with a minimum mass of the source, improved response speed of the output voltage and its high quality.

The purpose of the invention is to increase the operational reliability of the stabilizer. alternating voltage

FIG. 1 shows a functional diagram of the proposed stabilizer; FIG. 2 shows a functional diagram of a master oscillator, designed according to the frequency multiplier principle with its phase-locked loop, FIG. 3 - key scheme with a lock.

The stabilizer (FIG. 1) contains a regulator 1, made for example on a modulator and a demodulator, the high-frequency outputs of which are connected by windings of a booster transformer, and connected through the input filter 2 and switch 3 to the input terminals, and through the output filter 4 to the output terminals to which the load 5 is connected. In parallel with the load 5, a transformer 6 is connected to the input of the rectifier 7, the output of which is connected to one of the inputs of the comparison node 8 and to the input of the delay node 9 connected to the input of the source 10 zadakntsogo; wives The other input of the comparison unit 8 is connected to the output of the source 10 of the driving voltage, and its output through the measuring transducer 11, consisting of series-connected; integrator with zeroing 12 and memory cells 13, and amplifier 14 is connected to control inputs of phase-shifting nodes 15 and 16. Parallel to the input terminals, generator 17 and zero-body 18 are connected by their clock inputs interlock, the control input of which is connected to the output of the null organ 18

80.2

It is connected to the synchronizing input of the regulator 1 and the synchronizing inputs of the phase-shifting nodes 15 and 16. To ensure the own needs of the stabilizer, it has a power supply 20, an input connected to the input terminals and outputs to the power supply circuits of other stabilizer units,

Phase-shifting nodes 15 and 16 can be made in the form of a series-connected sawtooth generator (GPN), the synchronization input of which is connected to the master oscillator, a comparator, one input of which is control, and the other connected to the output of GPN, and a trigger. The difference between phase-shifting nodes from one another is that in one of them the FPG generates a linearly increasing voltage, and in the other - a linearly decreasing voltage.

The master oscillator (FIG. 2) contains series-connected

a synchronizer 21, to the input of which a supply voltage is applied) with a frequency if, a frequency converter 22 (time) is a voltage consisting of a saw-tooth generator 23

voltage and memory cells 24, and the controlled generator 25, To the output of the controlled generator 25 through the frequency divider 26 is connected the front driver 27 (in the simplest

case - differentiating circuit), the output connected to the control input of memory cell 24.

The key .19 with blocking (FIG. 1) can be executed on logical

elements NE-28-32 (FIG. 3), where elements 28-31 are inverters, the output of element 30 is connected to one of the inputs of element 29.

the voltage from the output of the null organ 18 (FIG. 1), the input of the element 32 is connected to the output of the master oscillator 17 (FIG. 1). The collector of the transistor 33 is connected to the input of the element 30, in the base

which has a chain of resistor 34, capacitor 35 and diode 36 connected to power supply 37 (+ E,), the key output is formed by the output of element 32,

Zero-body 18 (Fig, 1) can be performed on two transistors, in the bases of which the secondary winding of the transformer connected by the primary winding to the supply network terminals is connected. The delay device 9 (Fig. 1) in the simplest case is a smoothing procedure (-C-filter. The integrator 12 with zeroing (Fig. 1) can be implemented on an operational amplifier whose inverse connection has a capacitor turned on. Shunted by a switch with a key (on the left transistor) .. The memory cells 13 and 24 (Figs. 1 and 2, respectively) can be made on a voltage repeater, to the input of which a capacitor of small capacitance is connected via an switch (field transistor. iSHCTOp). wife works. as follows. its voltage to its input (closing of the switch 3) increases the voltage at the outputs of the power source 20 and when it reaches the set value at the output of the zero-body 18, short-term voltage pulses are generated by the zero-body 18 at each zero crossing of the supply voltage At the same time, the generator 17 is started and its operation is synchronized with the supply voltage frequency. At the same time, the voltage from the null-18 output goes to the control input of the key 19 with a lock, it closes, stay in this position until the end of the stabilizer operation, and the output voltage of the master oscillator 17 through the switch 19 is supplied to synchronize the outputs of the phase-shifting nodes 15 and 16. At the output of the regulator 1, a voltage arises, which through the filter 4 and the transformer 6 is applied to the input of the rectifier -: l 7. The voltage from the output of the rectifier 7, the passage through the delay device 9, is fed to the input of the source 10 of the driving voltage. As a result, its output voltage slowly increases and after a few half cycles, the voltage reaches a predetermined value and, in comparison node 8, is compared with the voltage from the rectifier output. The result of the comparison with the output of the comparison node 8 is fed to the input of the measuring converter. 11 (integrator input 12 with zeroing). In integrator 12, the voltage is integrated into each half-period of the supply voltage, and when the supply voltage passes through zero, it also zeroes. The result of the integration is fed to the input of memory cell 13, where the instantaneous values of this voltage are remembered before each zeroing. The control signal thus generated is amplified by the amplifier 14 and supplied to the control inputs of the phase-shifting nodes 15 and 16. In the phase-shifting nodes, the voltage is compared with the linearly increasing and linearly falling sawtooth voltages produced in the phase-shifting nodes. Depending on the magnitude of the voltage, various modes of operation of the regulator are possible, with the result that a stable voltage occurs at the output terminals.

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Claims (1)

VARIABLE VARIABLE STABILIZER, containing a regulator with synchronizing and two. control inputs, connections through the input filter to the input terminals, and through the output filter to the output terminals, a rectifier, the input through a matching transformer connected to the output terminals, a comparison node, one input of which is connected to the output of the source of the supply voltage, the amplifier, the output of which is connected to control inputs of two phase-shifting nodes, outputs connected to the corresponding control inputs of the regulatory body, a measuring transducer and a master oscillator, characterized in that, for the purpose To increase operational reliability, a delay assembly, a key with a lock and a zero-organ are inserted into it, the output is connected to the control input of the key, and the input is connected to the input terminals, where the synchronizing input of the master oscillator is also connected, the output of which is connected via the key With blocking Σ with the synchronizing inputs of the regulatory body and two phase-shifting nodes, the delay node is connected between the output of the rectifier and the input of the source of the reference voltage, and the output of the rectifier is connected to another input of the comparison node, the output which through the measuring transducer is connected to the input of the amplifier, while the measuring ‘transducer is made in the form of a series-connected integrator with zeroing and a memory cell. SU, "1166080 I. 2