CN202331244U

CN202331244U - Alternating current contactless voltage stabilizer

Info

Publication number: CN202331244U
Application number: CN2011204695425U
Authority: CN
Inventors: 刘德军; 黄勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-11-23
Filing date: 2011-11-23
Publication date: 2012-07-11
Anticipated expiration: 2021-11-23

Abstract

The utility model relates to an alternating current contactless voltage stabilizer, which is composed of a 220V alternating current power supply, a full-bridge rectifying circuit, an automatic coupling voltage regulator, a half-wave rectifying circuit, a one-way silicon controlled rectifier and a relaxation oscillating circuit, wherein a unijunction transistor with a BT33 model is adopted in the relaxation oscillating circuit. By using the operating principle of a servo motor alternating current voltage stabilizer for reference, the alternating current contactless voltage stabilizer has the advantages of being simple in circuit structure, achieving contactless voltage regulating, being fast, convenient and accurate in voltage regulating response and free of waveform distortion, being suitable for mains supply alternating voltage in a range of 160-260V and the like, and saves a large number of copper materials. The alternating current contactless voltage stabilizer is not provided with voltage switching contacts, thereby being not capable of generating contact fire striking, further not generating electromagnetic interference, causing no pollution to a power grid, being especially suitable for being used in areas with a large power grid voltage fluctuating range, and being capable of replacing various traditional large power alternating current voltage-stabilizing power supplies in the market.

Description

The contactless voltage stabilizer of alternating current

Technical field

The utility model belongs to the application of electronic technology field, relates to the contactless voltage stabilizer of a kind of alternating current.

Background technology

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 relative merits are respectively: it is simple, cheap that relay stepping switch type has a circuit structure; But the voltage stepping is coarse, the contact is prone to produce spark and electromagnetic interference (EMI) during the voltage gear switch, the switching reaction velocity 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 through the controlling of sampling circuit sending signal; Automatically adjust the position of self coupling regulator carbon brush; Make output voltage adjust to ratings and reach steady state (SS); Undistorted in the voltage handoff procedure, no instant cut-off and contactless sparking produce the phenomenon of electromagnetic interference (EMI); Have precision of voltage regulation height, noiseless during operation, but circuit structure is complicated, response speed is slow partially, voltage stabilized range is narrower, the carbon brush easy abrasion of autotransformer, to consume the red copper material more.

Below specify the contactless voltage stabilizer of alternating current related relevant technologies content in manufacturing process.

The utility model content

Goal of the invention and beneficial effect: the contactless voltage stabilizer of the described alternating current of the utility model has been used for reference servomotor full-automatic AC voltage stabilizer principle of work; Circuit has simple in structure; Realized contactless voltage-regulating, the voltage adjustment response time is quick, accurate, no waveform distortion; The civil power alternating voltage scope of application reaches advantages such as 160～260V, and has saved a large amount of copper materials.This voltage stabilizer is not because of there being the voltage double-throw contact; So can not taking place, the contact sparking do not produce electromagnetic interference (EMI); 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 supplys on the market.

Technical characterictic: the contactless voltage stabilizer of alternating current, the contactless voltage stabilizer of alternating current is made up of 220V AC power, full bridge rectifier, auto-coupling pressure regulator and half-wave rectifying circuit, one-way SCR and relaxation oscillations circuit, and its characteristic comprises:

Full bridge rectifier: be connected into full bridge rectifier by 4 silicon rectifier diode D1～D4; Be connected on the alternating current input end of full bridge rectifier behind the winding Ta of the live wire end L serial connection auto-coupling pressure regulator of the zero line side N of 220V AC power, 220V AC power respectively; The anodal VCC of full bridge rectifier DC output end, the negative pole connection circuit ground GND of full bridge rectifier DC output end;

The end of auto-coupling pressure regulator winding Tb in auto-coupling pressure regulator and the half-wave rectifying circuit links to each other the sub-L ' of another termination alternating current output end of pressure-stabilizing of the winding Tb of auto-coupling pressure regulator with the live wire end L of 220V AC power, the positive pole of silicon rectifier diode D5;

The model of unijunction transistor is BT33 in one-way SCR and the relaxation oscillations circuit; One end of the e pin of unijunction transistor BG1 and the end of potentiometer RP1 and lever arm thereof, 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 b2 pin of unijunction transistor BG1 links to each other with an end of the control utmost point of unidirectional controllable silicon S CR, resistance R 2, the anodal VCC of another termination full bridge rectifier DC output end of the anode of unidirectional controllable silicon S CR and resistance R 2, behind the b1 pin series resistor R3 of unijunction transistor BG1 with the negative electrode connection circuit ground GND of unidirectional controllable silicon S CR.

The circuit working principle: the contactless voltage stabilizer of alternating current, be added on the unidirectional controllable silicon S CR behind mains voltage winding Ta entering full-bridge rectification D1～D4 circuit through the auto-coupling pressure regulator, the conduction angle of unidirectional controllable silicon S CR receives the control of unijunction transistor BG1.Form a relaxation oscillations circuit by unijunction transistor BG1, capacitor C 1, resistance R 1, R2, R3 and potentiometer RP1, change the oscillation period that potentiometer RP1 resistance can change relaxation oscillator.

When 220V AC power input voltage raises; Be added in the corresponding rising of voltage on the unijunction transistor BG1, the oscillation frequency of relaxation oscillator is accelerated, and unidirectional controllable silicon S CR conduction angle reduces; Voltage on the unidirectional controllable silicon S CR raises, and it is constant that the winding Ta of pressure regulator goes up voltage.Otherwise when the mains supply input voltage reduced, voltage on the unidirectional controllable silicon S CR descended, and the voltage on the winding Ta of pressure regulator still remains unchanged, and the voltage that is coupled to like this behind the winding Tb of pressure regulator also keeps invariable.

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

Description of drawings

Accompanying drawing 1 is the circuit working schematic diagram of the contactless voltage stabilizer of alternating current; 220V ac power input end in the accompanying drawing 1 is respectively the live wire end L of 220V AC power, the zero line side N of 220V AC power; L ' is alternating current output end of pressure-stabilizing.

Embodiment

Technical requirement according to the components and parts of the circuit working schematic diagram of the contactless voltage stabilizer of alternating current shown in the accompanying drawing 1 and description of drawings and the following stated is implemented, and can realize the utility model.

Components and parts technical parameter and selection

T is the auto-coupling pressure regulator, and the power that requires auto-coupling pressure regulator T is greater than 1/3 of voltage stabilizer power;

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

SCR is an one-way SCR, requires electric current greater than 5A, withstand voltage more than 600V, or the selected technology parameter has the one-way SCR of big surplus; BG1 is a unijunction transistor, and model is selected BT33 for use;

Select the 3W metalfilmresistor for use, resistance R 1 is 47K Ω with the R2 resistance, and the resistance of R3 is 150 Ω;

RP1 is potentiometer or selects adjustable resistance for use that its resistance is 220K Ω, requires more than the power 3W;

C1 is an electric capacity, selects electric capacity of the dacron for use, and its capacity is 0.022 μ F, and withstand voltage is 160V.

The making of element and circuit debugging

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

In the circuit of the contactless voltage stabilizer of alternating current; 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, physical connection line and welding quality through scrutiny errorless after, circuit need not debugged basically and get final product operate as normal.

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

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

Claims

1. the contactless voltage stabilizer of alternating current is made up of 220V AC power, full bridge rectifier, auto-coupling pressure regulator and half-wave rectifying circuit, one-way SCR and relaxation oscillations circuit, and its characteristic comprises:

Full bridge rectifier is connected into full bridge rectifier by 4 silicon rectifier diode D1～D4; Be connected on the alternating current input end of full bridge rectifier behind the winding Ta of the live wire end L serial connection auto-coupling pressure regulator of the zero line side N of 220V AC power, 220V AC power respectively; The anodal VCC of full bridge rectifier DC output end, the negative pole connection circuit ground GND of full bridge rectifier DC output end;