CN102122893A

CN102122893A - Single-phase AC (Alternating Current) full-automatic non-contact voltage stabilizer

Info

Publication number: CN102122893A
Application number: CN201110047375XA
Authority: CN
Inventors: 朱虹
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-02-28
Filing date: 2011-02-28
Publication date: 2011-07-13

Abstract

The invention belongs to the field of the application of an electronic technology and relates to a single-phase AC (Alternating Current) full-automatic non-contact voltage stabilizer, consisting of a commercial power supply, a full-bridge rectifying circuit, a self-coupled voltage regulator, and a half-wave DC (Direct Current) circuit and a relaxation-oscillator circuit for controlling silicon controlled rectifier (SCR), wherein the model of a unijunction transistor in the relaxation-oscillator circuit is BT33. By taking the working principle of the servo motor AC voltage stabilizer as reference, the single-phase AC full-automatic non-contact voltage stabilizer provided by the invention has the advantages of simple structure of circuit, realization of non-contact voltage regulation, rapid and accurate response to voltage regulation, no waveform distortion and suitableness for the commercial AC voltage range from 160 V to 290 V; and a large number of copper materials are saved. The voltage stabilizer has no voltage switching contact, so that no electromagnetic interference generated by contact sparking occurs, and no pollution is caused to the power grid; and in particular, the voltage stabilizer provided by the invention is suitable for regions with larger voltage fluctuation range of a power grid and can replace various traditional high-power AC voltage-stabilized sources in the market.

Description

A kind of single-phase alternating current fully automatic contactless pressurizer

Technical field

The invention belongs to the application of electronic technology field, relate to a kind of single-phase alternating current fully automatic contactless pressurizer.

Background technology

Alternating current steady voltage plug has extensive use at equipment such as the higher computer of voltage request, testing equipment, communication system, Medical Devices, industrial automations.At present, the main type of alternating current steady voltage plug has several types such as relay stepping switch type, magnetic saturation type, servomotor type on the market, its pluses and minuses are respectively: it is simple, cheap that relay stepping switch type has a circuit structure, but the voltage stepping is coarse, the contact easily produces spark and electromagnetic interference during the voltage gear switch, the switching reaction speed is slow, and has the instant cut-off phenomenon.Be not suitable on the higher equipment of power requirement, using; The magnetic saturation type has that circuit structure is simple, the characteristics of contactless voltage stabilizing, but is not suitable for making the AC voltage regulator of power greater than 150W; The voltage stabilizing of servomotor type AC voltage regulator drives servomotor by the controlling of sampling circuit sending signal, automatically adjust the position of self coupling adjuster carbon brush, make output voltage adjust to rated value and reach stable state, undistorted in the voltage handoff procedure, no instant cut-off and contactless sparking produce the phenomenon of electromagnetic interference, has precision of voltage regulation height, noiseless during operation, but that circuit structure complexity, response speed are slow partially, voltage stabilized range carbon brush narrower, autotransformer weares and teares, consumes the red copper material easily is more.

In order to overcome the many disadvantages of the existing congenital existence of single-phase alternating current pressurizer on the market, be necessary to study a kind of universal single-phase alternating current fully automatic contactless pressurizer of making.

Below describe involved relevant technologies in the single-phase alternating current fully automatic contactless pressurizer manufacturing process in detail.

Summary of the invention

Goal of the invention and beneficial effect: single-phase alternating current fully automatic contactless pressurizer of the present invention has been used for reference servomotor full-automatic AC pressurizer operation principle, circuit has simple in structure, realized contactless voltage-regulating, it is quick, accurate that voltage is adjusted the response time, no waveform distortion, the civil power alternating voltage scope of application reaches advantages such as 160～290V, and has saved a large amount of copper materials.This pressurizer is not because of there being the voltage double-throw contact, so can not taking place, the contact sparking do not produce electromagnetic interference, can not pollute electrical network, be particularly suitable for the bigger area of voltage ripple of power network scope and use, can replace various traditional high power AC stabilized voltage power supplys on the market.

Technical characterictic: single-phase alternating current fully automatic contactless pressurizer, relaxation oscillator circuit by mains supply, full bridge rectifier, auto-coupling voltage regulator and half-wave DC circuit, control unidirectional controllable silicon S CR is formed, and its technical characterictic is: the model of unijunction transistor is BT33 in the relaxation oscillator circuit.

The annexation that the composition of other parts circuit and components and parts are mutual

1. full bridge rectifier: (D1～D4) is connected into full bridge rectifier by 4 silicon rectifier diodes, it is characterized in that: be connected on respectively behind the Ta winding of the live wire end L of the zero line side N of mains supply, mains supply serial connection auto-coupling voltage regulator that (D1～D4) constitutes the input of full bridge rectifier by 4 silicon rectifier diodes, the anodal connection circuit positive pole (VCC) of full bridge rectifier output, the negative pole connection circuit ground (GND) of full bridge rectifier output.

2. the winding Tb of auto-coupling voltage regulator and half-wave DC circuit: an end of auto-coupling voltage regulator Tb winding links to each other with live wire end L, the silicon rectifier diode D5 of mains supply is anodal, the end of rectification silicon diode D5 negative pole connecting resistance R1, the sub-L ' of another termination output end of pressure-stabilizing of the Tb winding of auto-coupling voltage regulator.

3. relaxation oscillator and one-way SCR control circuit: relaxation oscillator is by unijunction transistor BG1, capacitor C 1, resistance R 1, resistance R 2, resistance R 3 and potentiometer RP1 form, the e pin of unijunction transistor BG1 respectively with the end of potentiometer RP1, the lever arm of potentiometer RP1, one end of capacitor C 1 links to each other, connect the negative pole of silicon rectifier diode D5 behind the other end series resistor R1 of potentiometer RP1, the other end connection circuit ground (GND) of capacitor C 1, the control utmost point of the b2 pin of unijunction transistor BG1 and one-way SCR (SCR), one end of resistance R 2 links to each other, the anode of one-way SCR (SCR) and the other end of resistance R 2 be with connection circuit positive pole (VCC), behind the b1 pin series resistor R3 of unijunction transistor BG1 with the negative electrode of one-way SCR (SCR) with connection circuit ground (GND).

Circuit working principle: single-phase alternating current fully automatic contactless pressurizer, mains voltage enters full-bridge rectification through auto-coupling voltage regulator winding Ta, and (D1～D4) be added on the one-way SCR (SCR) behind the circuit, the angle of flow of one-way SCR (SCR) is subjected to the control of unijunction transistor BG1.Form a relaxation oscillator by unijunction transistor BG1, capacitor C 1, resistance R 1, R2, R3 and potentiometer RP1, change the cycle of oscillation that potentiometer RP1 resistance can change relaxation oscillator.

When the mains supply input voltage raises, be added in the corresponding rising of voltage on the unijunction transistor BG1, the frequency of oscillation of relaxation oscillator is accelerated, and one-way SCR (SCR) angle of flow reduces, voltage on the one-way SCR (SCR) raises, and voltage is constant on the voltage regulator Ta winding.Otherwise when the mains supply input voltage reduced, voltage on the one-way SCR (SCR) descended, and the voltage on the voltage regulator Ta winding still remains unchanged, and the voltage that is coupled to like this behind the voltage regulator Tb winding also keeps invariable.

Owing to adopted full bridge rectifier, so the alternating voltage on voltage regulator Ta winding and the Tb winding has all kept sine wave.

Description of drawings

Accompanying drawing is the circuit working schematic diagram of single-phase alternating current fully automatic contactless pressurizer.

Mains supply input in the accompanying drawing is respectively: the live wire end L of mains supply, the zero line side N of mains supply; The output of single-phase alternating current fully automatic contactless pressurizer is respectively the zero line side N of the sub-L ' of output end of pressure-stabilizing, mains supply; Wherein the zero line side N of mains supply is a public terminal.

Embodiment

Specification requirement according to the components and parts of the circuit working schematic diagram of the fully automatic contactless of single-phase alternating current shown in accompanying drawing pressurizer and description of drawings and the following stated is implemented, and can realize the present invention.

Components and parts technical parameter and selection

1.T be the auto-coupling voltage regulator, the power that requires auto-coupling voltage regulator T is greater than 1/3 of pressurizer power;

2.D1～D5 is a silicon rectifier diode, model is IN5408, or selects above, the withstand voltage rectifier diode greater than 600V of rectified current 3A for use;

3.SCR be one-way SCR, require electric current greater than 5A, withstand voltage more than 600V, or the selected technology parameter have the one-way SCR of big surplus;

4.BG1 be unijunction transistor, model is selected for use: BT33;

5. select the 3W metalfilmresistor for use, resistance R 1 and R2 resistance are 47K Ω, and the resistance of R3 is 150 Ω;

6.RP1 be potentiometer or adjustable resistance, its resistance is 220K Ω, requires more than the power 3W;

7.C1 be electric capacity, select electric capacity of the dacron for use, its capacity is 0.022 μ F, withstand voltage is 160V.

The making of subelement and circuit debugging

1. its capacity of auto-coupling voltage regulator T should be determined according to the power of electrical appliance.Present embodiment pressurizer power setting is 500W, and the power of auto-coupling voltage regulator T is about 1/3 of pressurizer power, that is: 170～180W so.The line footpath of auto-coupling voltage regulator Ta winding and the used enamelled wire of Tb winding is identical, and the number of turn of two windings is also identical, the coiling of Ta winding elder generation, and then coiling Tb winding leaves a tap in the middle of the winding.

2. in the circuit of single-phase alternating current fully automatic contactless pressurizer, as long as the electronic devices and components performance of selecting for use is intact, and the components and parts annexation in the accompanying drawing is welded to specifications, after physical connection line and welding quality process scrutiny were errorless, circuit did not need debugging to get final product operate as normal substantially.

3. change with a 500W manual voltage regulator simulation line voltage, and connect whole loads, fractional load respectively at single-phase alternating current fully automatic contactless pressurizer, the situation of change of difference observation test single-phase alternating current fully automatic contactless stabilizer output voltage, by suitable adjustment adjustable resistance RP1, make the voltage stabilized range of pressurizer when being connected to load can satisfy of the variation of civil power alternating voltage at 160～290V.

4. for further reducing the leakage field problem of single-phase alternating current fully automatic contactless pressurizer, single-phase alternating current fully automatic contactless pressurizer preferably adopts iron casing, with the quality of further assurance pressurizer.

Claims

1. single-phase alternating current fully automatic contactless pressurizer, relaxation oscillator circuit by mains supply, full bridge rectifier, auto-coupling voltage regulator and half-wave DC circuit, control one-way SCR (SCR) is formed, and its technical characterictic is: the model of unijunction transistor is BT33 in the relaxation oscillator circuit.

2. single-phase alternating current fully automatic contactless pressurizer according to claim 1, (D1～D4) is connected into full bridge rectifier to full bridge rectifier in the circuit by 4 silicon rectifier diodes, it is characterized in that: be connected on respectively behind the Ta winding of the live wire end L of the zero line side N of mains supply, mains supply serial connection auto-coupling voltage regulator that (D1～D4) constitutes the input of full bridge rectifier by 4 silicon rectifier diodes, the anodal connection circuit positive pole (VCC) of full bridge rectifier output, the negative pole connection circuit ground (GND) of full bridge rectifier output.

3. single-phase alternating current fully automatic contactless pressurizer according to claim 1, it is characterized in that: an end of the auto-coupling voltage regulator Tb winding in the winding Tb of auto-coupling voltage regulator and the half-wave DC circuit links to each other with live wire end L, the silicon rectifier diode D5 of mains supply is anodal, the end of rectification silicon diode D5 negative pole connecting resistance R1, the sub-L ' of another termination output end of pressure-stabilizing of the Tb winding of auto-coupling voltage regulator.

4. single-phase alternating current fully automatic contactless pressurizer according to claim 1, relaxation oscillator in the circuit and one-way SCR control circuit feature are: relaxation oscillator is by unijunction transistor BG1, capacitor C 1, resistance R 1, resistance R 2, resistance R 3 and potentiometer RP1 form, the e pin of unijunction transistor BG1 respectively with the end of potentiometer RP1, the lever arm of potentiometer RP1, one end of capacitor C 1 links to each other, connect the negative pole of silicon rectifier diode D5 behind the other end series resistor R1 of potentiometer RP1, the other end connection circuit ground (GND) of capacitor C 1, the control utmost point of the b2 pin of unijunction transistor BG1 and one-way SCR (SCR), one end of resistance R 2 links to each other, the anode of one-way SCR (SCR) and the other end of resistance R 2 be with connection circuit positive pole (VCC), behind the b1 pin series resistor R3 of unijunction transistor BG1 with the negative electrode of one-way SCR (SCR) with connection circuit ground (GND).