CN102497089A

CN102497089A - Alternating current power supply purifier

Info

Publication number: CN102497089A
Application number: CN2011104494168A
Authority: CN
Inventors: 丁希庆; 黄勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-12-28
Filing date: 2011-12-28
Publication date: 2012-06-13

Abstract

The invention relates to an alternating current power supply purifier. The alternating current power supply purifier is composed of a 220V alternating current power supply, a low frequency electromagnetic wave filter circuit, a power frequency harmonic wave component filtering circuit, an in-phase filter and a high frequency electromagnetic wave filter circuit. The alternating current power supply purifier is aimed at improving problems of a high price and the like of various alternating current power supply purifier finished products in the market. The alternating current power supply purifier can effectively purify electromagnetic interference on alternating current caused by transient pulse and harmonic wave, thunder, an electric welding machine, an electric drill, a grinder and the like and greatly reduce background noise of sound equipment. The alternating current power supply purifier is designed for a present situation of power supply and a wage-earner class, and the circuits have the advantages of simple design, few components, simple manufacture, a good alternating current power supply purifying effect and the like.

Description

The AC power purifier

Technical field

The invention belongs to electronic technology and power purification technical field, relate to a kind of AC power purifier.

Background technology

The pollution source approach of electrical noise in the AC power electrical network:

Aerial stray electrical magnetic wave is induced among the supply line, and the power transmission line of residential electricity consumption does not almost all use metallic steel pipe network shielding mode, and visual plant, high end audio etc. does not have special supply line yet;

In 220V AC power electrical network, there are the electrical noise pollutant sources, as: the high frequency radiation that facilities such as the electrical equipment of electronic dimming equipment, Switching Power Supply (AC/DC), alternating current generator produce;

Insert the low power factor inductive load of 220V AC power operation of power networks, such as refrigerator, air conditioner etc., and during the open and close of high power load, the surge current that in circuit, is produced etc.;

Wherein first kind of noise is less easily by filtering because of peak value, and the not only shared frequency spectrum of second and third kind noise is wide, and interference signal intensity is also bigger, thoroughly is eliminated the comparison difficulty.

At present; The existing special electronic device that is used for the alternating current purification on the market; But there are problems such as circuit structure complicacy, price height in their majorities, and like: the audiophilia tonequality that constantly aspires after perfection, quality AC power inferior is more and more outstanding to the problem of stereo set tonequality influence.The power purification device of the homemade or import brand on the market, though the AC power quality is all had certain clean-up effect, hundreds of is first at least, the price of thousands of units makes ordinary consumer be difficult to excessive demand at most.

For this reason, the present invention is the special a kind of AC power purifier that designs to supplying power present situation and wage-earners.

Summary of the invention

Goal of the invention and beneficial effect: improve for remedying that various finished product AC power purifiers exist price than problems such as height on the market.The present invention can purify alternating current effectively by the electromagnetic interference that transient pulse harmonic, thunder and lightning, electric welding machine, electric drill, sander etc. cause, and can reduce the background noise of stereo set significantly.The present invention is the special a kind of AC power purifier that designs to supplying power present situation and wage-earners, and its circuit has designed with simple, advantages such as the components and parts consumption is few, making is simple, alternating-current power supply good purification.

The circuit working principle: the circuit of AC power purifier is taked the mode of high frequency, low frequency electrical noise multiple filter, and the low-frequency electromagnetic wave filter circuit carries out filtering to the low frequency electromagnetic clutter on the 220V AC power inlet wire; Industrial frequency harmonic component filtering circuit is made up of inductance L 1, capacitor C 3, inductance L 2 loops; Be responsible for filtering by it and be superimposed on the low-frequency harmonics component on the 50Hz power-frequency voltage; But circuit does not adopt in-phase filter commonly used, to improve the filter effect of this grade to even-order harmonic.In-phase filter is made up of electric capacity capacitor C 3, inductance L 3, inductance L 4, capacitor C 4 loops; Because capacitor C 3; Capacitor C 4 capacity values are bigger; Inductance L 3, inductance L 4 transformer core power are big and umber of turn is more, so low side harmonic component and the surge current in the 220V alternating current electrical network that is superimposed on the 50Hz power-frequency voltage had extremely strong absorption, inhibitory action, can reduce the distortion factor of 50Hz sine wave alternating current significantly.The frequency electromagnetic waves filter circuit is made up of capacitor C 5, capacitor C 6, and capacitor C 5, capacitor C 6 are used for the interference of further filtering frequency electromagnetic waves to the 220V AC power.

Technical scheme: the AC power purifier, to form by 220V AC power, low-frequency electromagnetic wave filter circuit, industrial frequency harmonic component filtering circuit, in-phase filter and frequency electromagnetic waves filter circuit, its characteristic comprises:

The low-frequency electromagnetic wave filter circuit: be made up of capacitor C 1 and capacitor C 2, an end interface of an end of capacitor C 1 and capacitor C 2 links to each other with circuit ground;

Industrial frequency harmonic component filtering circuit: form by inductance L 1, inductance L 2 and capacitor C 3; One end of capacitor C 3 links to each other with the other end of an end of inductance L 1, capacitor C 1 and an end of inductance L 3; The other end of capacitor C 3 links to each other with an end of inductance L 2, the other end of capacitor C 2 and an end of inductance L 4; The live wire end L of another termination 220V AC power of inductance L 1, the zero line side N of another termination 220V AC power of inductance L 2;

In-phase filter: be made up of with capacitor C 4 inductance L 3, inductance L 4, the other end of the other end of inductance L 3 and inductance L 4 connects the two ends of capacitor C 4 respectively;

The frequency electromagnetic waves filter circuit: be made up of capacitor C 5, capacitor C 6, an end interface of an end of capacitor C 5 and capacitor C 6 links to each other with circuit ground, and the other end of capacitor C 5 other ends, capacitor C 6 meets the output L ' of alternating current and the output N ' of alternating current respectively.

Description of drawings

Accompanying drawing 1 is the circuit working schematic diagram of AC power purifier; Dotted line in the accompanying drawing 1 is represented low frequency inductance L 3, same group of transformer core of inductance L 4 uses.

Embodiment

In conjunction with Figure of description 1 and following examples correlation technique of the present invention is done further to describe.

The selection of components and parts and technical parameter thereof

Long-time for adapting to, uninterrupted continuous job requirement, components and parts make every effort to select stable performance, reliable operation, and screen the wide and resistant to elevated temperatures element of thermal adaptability as far as possible.

Electric capacity is all selected WIMA board MKP-10 type for use, and the capacity of capacitor C 1, C2 is 0.1 μ F, and the capacity of capacitor C 3, C4 is 2.2 μ F, and the capacity of capacitor C 5, C6 is 0.082 μ F, and all electric capacity requires withstand voltage >=630V.

Circuit production and debugging

Described AC power purifier technical parameter and requirement are example with maximum load power 1000W:

High-frequency inductor L1, L2 use ￠ 1.8mm high strength enamelled wire on the high frequency magnet ring of external diameter as ￠ 30mm, to wear around 25 circles respectively, and through soaking insulating varnish, oven dry;

Low frequency inductance L 3, L4 wear around 100 circles with two-wire on the ring transformer cores of a 40VA is parallel with ￠ 1.8mm high strength enamelled wire.Pay particular attention to: end of the same name is for advancing together or going out together; Two lines parallel around high strength enamelled wire; Its voltage between lines is 220V; Need soak insulating varnish for dielectric strength between raising enamelled wire line, insulation resistance is tested with megohmmeter in the oven dry back, requires the insulation resistance requirement greater than 0.5M Ω; Also optional with the big slightly EI type transformer core replacement of power, but slightly influential to the AC power clean-up effect;

Use two-sided copper foil circuit plate as the pedestal of installation with welding component, all elements all directly are welded on on the copper foil plate circuit, and whole copper foil face reverse side uses as large tracts of land ground connection.High-frequency inductor L1, L2 weld, fix the back and use the epoxy resin sealing.Low frequency inductance L 3, L4 toroidal inductor are used lower insulation plate and are clamped, and then are fastened on the two-sided copper foil printed circuit plate with the copper screw of 8mm;

Specify: the circuit ground of AC power purifier must independently be provided with, and requirement reliably is connected with the earth, otherwise what purification effectiveness the 220V alternating-current power supply is not had basically!

Claims

1. an AC power purifier is made up of 220V AC power, low-frequency electromagnetic wave filter circuit, industrial frequency harmonic component filtering circuit, in-phase filter and frequency electromagnetic waves filter circuit, and its characteristic comprises:

The low-frequency electromagnetic wave filter circuit is made up of capacitor C 1 and capacitor C 2, and an end interface of an end of capacitor C 1 and capacitor C 2 links to each other with circuit ground;

Industrial frequency harmonic component filtering circuit is made up of inductance L 1, inductance L 2 and capacitor C 3; One end of capacitor C 3 links to each other with the other end of an end of inductance L 1, capacitor C 1 and an end of inductance L 3; The other end of capacitor C 3 links to each other with an end of inductance L 2, the other end of capacitor C 2 and an end of inductance L 4; The live wire end L of another termination 220V AC power of inductance L 1, the zero line side N of another termination 220V AC power of inductance L 2;

In-phase filter is made up of with capacitor C 4 inductance L 3, inductance L 4, and the other end of the other end of inductance L 3 and inductance L 4 connects the two ends of capacitor C 4 respectively;

The frequency electromagnetic waves filter circuit is made up of capacitor C 5, capacitor C 6, and an end interface of an end of capacitor C 5 and capacitor C 6 links to each other with circuit ground, and the other end of capacitor C 5 other ends, capacitor C 6 meets the output L ' of alternating current and the output N ' of alternating current respectively.