CN2080189U

CN2080189U - Ac voltage stabilizer

Info

Publication number: CN2080189U
Application number: CN 90226683
Authority: CN
Inventors: 张桂欣
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-12-29
Filing date: 1990-12-29
Publication date: 1991-07-03

Abstract

The utility model relates to an AC voltage stabilizer composed of a transformer, a sampling circuit, a rectifying and filleting circuit, a comparative circuit, a reference power supply circuit, a magnifying circuit, a switching circuit and an executive circuit. A transformer core can move, a coil in the output terminal is provided with a movable metallic contact, and the coil is serially connected with the other coil. A tap is arranged in the connection part of the two coils, and the movable metallic contact can move following the power supply voltage fluctuation or the load voltage variation from top to bottom. The AC voltage stabilizer has the advantages of large voltage stabilizing range and high voltage stabilizing accuracy, and the AC voltage stabilizer can be freely adjusted.

Description

AC voltage stabilizer

The utility model relates to a kind of AC voltage regulator, is applicable to the voltage stabilizing that exchanges instrument, equipment and circuit.

The AC voltage regulator of Chu Shouing in the market, general complex structure costs an arm and a leg.The CN-87214953 patent disclosure a kind of transformer that is used to exchange the stable output of power supply of instrument, equipment and circuit, it is the A.C. contactor in transformer output termination electricity consumption magnetic shielding, the moved end of contactor connects a trace, and the number of turn of transformer output terminal coil is greater than the former number of turn of appraising and deciding.On the coil of transformer output terminal, put a live metal contact, the trace of an edge joint contactor moved end, the spring of another edge joint one stationkeeping can make the transformer output end voltage keep stable.The technology of this burning voltage, structure is simpler, but owing to adopt A.C. contactor, the burning voltage scope is little, the precision of voltage regulation is low, and can not be adjustable arbitrarily.

It is big that task of the present utility model provides a kind of voltage stabilized range, precision of voltage regulation height, and can any adjustable AC voltage regulator.

For realizing above-mentioned task, the technical solution adopted in the utility model is: transformer output terminal one coil is put a live metal contact, the sample circuit that the output terminal load voltage is formed through resitstance voltage divider, bridge rectifier filter circuit, comparator circuit and the silicon voltage regulator diode reference power supply be made up of resistance, potentiometer are connected with triode emitter-base bandgap grading output amplifier.Described transformer core is movably, is equipped with coil of coil tandem of live metal contact, in its series connection place tap is arranged.The bridge-type commutating circuit that the output of emitter-base bandgap grading output amplifier is formed via resistance, potentiometer and field effect transistor is connected with the executive circuit of being made up of resistance, diode, triode and direct current generator.Direct current generator mechanically is connected with the live metal contact of transformer output winding.The load voltage that needs voltage stabilizing is during less than a certain voltage, and the phase shifting transformer iron core is regulated magnetic flux, and its load voltage is by the coil output that is equipped with the live metal contact; During greater than a certain voltage, iron core is fixed, and its load voltage is exported by two series coils.Mains fluctuations or load voltage change, through sampling, rectifying and wave-filtering, comparison, reference power supply, amplification, commutating circuit export executive circuit to, executive circuit drives transformer output terminal coil live metal contact and moves, realize the voltage stabilizing on a large scale of load voltage high stability, and can adjust arbitrarily.

Because the utility model adopts technique scheme, the live metal contact of transformer output terminal coil is followed mains fluctuations or load voltage variation and is moved, make arbitrary load voltage stable, adopt A.C. contactor to realize that load voltage is stable compared to prior art, so the load voltage range of stability is big, and it is adjustable arbitrarily, transformer output terminal string has two coils, at load voltage during less than certain voltage, and moving iron core, regulate magnetic flux, still can realize precision of voltage regulation height at underload voltage.

Below in conjunction with drawings and Examples the utility model is described in further detail.

Fig. 1 is the AC voltage regulator block scheme.

Fig. 2 is the AC voltage stabilizer circuit schematic diagram.

Fig. 1 has illustrated the composition of AC voltage regulator.It by transformer, sample circuit, current rectifying and wave filtering circuit, comparator circuit, reference power supply, amplifying circuit, commutating circuit, hold to circuit and direct supply and form.When mains fluctuations or load voltage variation, by the sample circuit number of winning the confidence, through rectifying and wave-filtering and reference power supply relatively after, amplifying circuit amplifies fluctuation signal, deliver to commutating circuit, executive circuit moves the live metal contact of transformer output winding according to the output of commutating circuit, reach the stable of load voltage, direct supply is as the power supply of amplification, commutation and executive circuit.

Fig. 2 has represented the connection of each circuit and the composition of element.Sample circuit, current rectifying and wave filtering circuit, comparator circuit, reference power supply and triode emitter-base bandgap grading output amplifier are prior art, no longer describe in detail.Transformer B input end has two coils, and a coil connects AC power

, another coil connects 7812 type D.C. regulated power supplies

D.C. regulated power supply

Output be connected with amplifying circuit, commutating circuit and executive circuit.Transformer B output terminal has two coil series connection, in series connection place tap a is arranged, and one of them coil is equipped with live metal contact K, and the number of turn of these two coils is decided according to need voltage stabilizing load voltage.Transformer output terminal coil and sample circuit and load Rf ₂Connect.Commutating circuit is by resistance R ₈Be an arm, resistance R ₁₀Be an arm, potentiometer R ω ₃, field effect transistor T ₂Be an arm and resistance R ₉It is the balanced bridge that an arm is formed.The ef two ends of bridge circuit are connected with direct supply E, and the gh two ends of bridge circuit are connected with the cd of executive circuit.Its output can make the direct current generator M forward or reverse of executive circuit, triode T ₁Emitter and field effect transistor T ₂Grid connect, executive circuit is by resistance R ₁₁, R ₁₂, R ₁₃, R ₁₄, diode D ₅, D ₆, triode T ₃, T ₄, T ₅Form with direct current generator M.Triode T ₃Base stage through resistance R ₁₂With triode T ₄Emitter connect T ₃Collector is connected with the end of DC electrode M, and through resistance R ₁₁E is connected with direct supply.Triode T ₄Base stage through diode D ₅, D ₆And resistance R ₁₄With triode T ₅Base stage connect.T ₄Emitter also through resistance R ₁₃Be connected and triode T with the other end of DC electrode M ₅Emitter connect.Triode T ₃Emitter, triode T ₄Collector and triode T ₅Collector and direct supply Connect.The axle of direct current generator M mechanically is connected with the live metal contact K of transformer B output terminal coil.

The course of work of the present utility model is as follows: when the stable load voltage of need during less than a certain voltage, with switch K ₁A is connected with transformer output terminal coil, and the phase shifting transformer iron core is regulated magnetic flux; When the stable load voltage of need during greater than a certain voltage, with switch K ₁B is connected with transformer B output terminal coil.Regulate resitstance voltage divider K ₂And the potentiometer R ω of comparator circuit ₁, triode T ₁Output make field effect transistor T ₂Resistance keep the bridge balancing of commutating circuit, when load voltage raise, by the resitstance voltage divider number of winning the confidence, through the silicon voltage regulator diode D of rectifying and wave-filtering and reference power supply ω comparison, its boosted voltage was through triode T ₁Amplify, deliver to field effect transistor T ₂Grid, field effect transistor T ₂Resistance reduce, the g terminal voltage of bridge circuit is held greater than h.This voltage is transported to the cd end of executive circuit, triode T ₃, T ₄Conducting, T ₅End, electric current is through resistance R ₁₃Flow through direct current generator M from left to right, the live metal contact K that direct current generator M drives transformer B output terminal coil moves down, and load voltage drops to primary voltage and reaches voltage stabilizing.While three utmost point T ₁Output reduces, field effect transistor T ₂Resistance increase.Make the bridge balancing of commutating circuit, direct current generator M stall, live metal contact K stops to move.When load voltage reduces, through above-mentioned identical process, triode T ₁Output reduces, field effect transistor T ₂Resistance increase, the h terminal voltage of bridge circuit is held greater than g, triode T ₅Conducting, T ₃, T ₄End, electric current is through resistance R ₁₁Flow through direct current generator M from right to left, drive contact K and move up, load voltage rises to primary voltage and reaches voltage stabilizing.While triode T ₁Output increases, field effect transistor T ₂Resistance reduce, bridge balancing, direct current generator M stall, metal contact K stops to move.

Claims

1, a kind of AC voltage regulator, be to be equipped with the live metal contact at transformer output terminal one coil, the sample circuit that the output terminal load voltage is formed through resitstance voltage divider, bridge rectifier filter circuit, comparator circuit and the silicon voltage regulator diode reference power supply be made up of resistance, potentiometer are connected with triode emitter-base bandgap grading output amplifier, it is characterized in that described transformer core is movably, be equipped with coil of coil tandem of live metal contact, in its series connection place tap is arranged, the output of above-mentioned triode emitter-base bandgap grading output amplifier is via resistance R ₈, R ₉, R ₁₀, potentiometer R _W3And field effect transistor T ₂The bridge-type commutating circuit of forming and by resistance R ₁₁, R ₁₂, R ₁₃, R ₁₄, diode D ₅, D ₆, triode T ₃, T ₄, T ₅And the executive circuit connection direct current generator M that direct current generator M forms mechanically is connected with transformer output terminal coil live metal contact K.

2,, it is characterized in that the bridge-type commutating circuit is by resistance R according to the described AC voltage regulator of claim 1 ₈Be an arm, resistance R ₁₀Be an arm, potentiometer R ω ₃And field effect transistor T ₂Be an arm and resistance R ₈It is the balanced bridge that an arm is formed.

3,, it is characterized in that the triode T of executive circuit according to the described AC voltage regulator of claim 1 ₃Base stage through resistance R ₁₂With triode T ₄Emitter connect T ₃Collector is connected with the end of direct current generator M, and through resistance R ₁₁E is connected with direct supply, triode T ₄Base stage through diode D ₅, D ₆And resistance R ₁₄With triode T ₅Base stage connect T ₄Emitter also through resistance R ₁₃Be connected with the other end of direct current generator M and with triode T ₅Emitter connect triode T ₃Emitter, triode T ₄Collector and triode T ₅Collector be connected with direct supply E, direct current generator M the axle mechanically be connected with the live metal contact K of transformer B output terminal coil.