CN109819588A - Power-supply filter and air-conditioning - Google Patents

Power-supply filter and air-conditioning Download PDF

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Publication number
CN109819588A
CN109819588A CN201910147083.XA CN201910147083A CN109819588A CN 109819588 A CN109819588 A CN 109819588A CN 201910147083 A CN201910147083 A CN 201910147083A CN 109819588 A CN109819588 A CN 109819588A
Authority
CN
China
Prior art keywords
power
supply filter
common mode
capacitor
mode choke
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910147083.XA
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Chinese (zh)
Inventor
黄强
万今明
曾颖宇
肖彪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN201910147083.XA priority Critical patent/CN109819588A/en
Publication of CN109819588A publication Critical patent/CN109819588A/en
Pending legal-status Critical Current

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/40Arrangements for reducing harmonics

Abstract

The invention discloses a kind of power-supply filter and air-conditionings, wherein, which includes double-layer printing circuit board, and the top layer of double-layer printing circuit board includes: the X capacitor and common mode choke being sequentially connected, wherein, the direction of an electric field of X capacitor is parallel with the leakage field flow direction of common mode choke.The present invention solves the problems, such as that the near-field coupling of power-supply filter common mode choke and X capacitor is stronger in the prior art, enhances the fade performance of filter.

Description

Power-supply filter and air-conditioning
Technical field
The present invention relates to electronic technology fields, in particular to a kind of power-supply filter and air-conditioning.
Background technique
Power supply line is to conduct electromagnetic disturbance (EMI) to be transferred into and out the main path of equipment, by power supply line, grid side Electromagnetic disturbance can be passed to equipment, the normal work of jamming equipment, and the electromagnetic disturbance that equipment generates may also be passed by power supply line It is multicast in power grid, interferes the normal work of other networking gears.
The effect of power supply (EMI) filter is: the frequency needed for allowing equipment to work normally (usual alternating current is 50/60Hz) Access device, and have biggish attenuation to electromagnetic disturbance frequency.
Power-supply filter is usually made of common mode choke, X capacitor, Y capacitance.Common mode choke is generally wound on annular magnetic On core, phase line is identical with zero curve winding technique mode, and the number of turns is identical, and Same Name of Ends is reversed.X capacitor be connected across phase line and zero curve it Between, generally use shape for the film safety capacitor of cuboid.For Y capacitance usually with two for one group, one of them is connected to phase line Between protective grounding (PE), another is connected between zero curve and PE, and two in one group Y capacitance nominal value is generally equal, Y electricity Appearance generallys use ceramic disc capacitor.
The near-field coupling of existing power supply filter common mode choke and X capacitor is stronger, causes filter to electromagnetic interference Fade performance reduces.
For the stronger problem of the near-field coupling of power-supply filter common mode choke and X capacitor in the related technology, at present still It does not propose to efficiently solve scheme.
Summary of the invention
The present invention provides a kind of power-supply filter and air-conditionings, are gripped at least solving power-supply filter common mode in the prior art The stronger problem of near-field coupling of stream circle and X capacitor.
In order to solve the above technical problems, according to an aspect of an embodiment of the present invention, providing a kind of power-supply filter, wrap Double-layer printing circuit board is included, the top layer of double-layer printing circuit board includes: the X capacitor and common mode choke being sequentially connected, wherein X The direction of an electric field of capacitor is parallel with the leakage field flow direction of common mode choke.
Further, X capacitor and common mode choke are sequentially connected according to the line that enters of the electric current of top layer to outlet direction.
Further, punched between X capacitor and common mode choke.
Further, the electric current of X capacitor enters line position and the current outlet position of common mode choke is punched.
Further, X capacitor is connected across between the firewire of top layer and zero curve.
Further, common mode choke includes: the first winding, is serially connected on the firewire of top layer;Second winding is serially connected in top On the zero curve of layer;Toroidal core, the first winding and the second winding technique are on toroidal core.
Further, the mode that firewire and zero curve are all made of paving copper foil carries out cabling.
Further, the cabling of top layer of cabling and printed circuit board of the bottom of printed circuit board is identical, printed circuit The cabling of the bottom of plate is carried out by the way of spreading copper foil.
Further, the thickness of copper foil is greater than copper thickness required by the electric current of printed circuit board.
Further, the cabling of the top layer of the bottom and printed circuit board of printed circuit board meets electrical safety distance, and The deflection angle of cabling is all made of rounded corner.
Further, further includes: Y capacitance, between common mode choke and the outgoing line position of the electric current of top layer.
According to another aspect of an embodiment of the present invention, a kind of air-conditioning is provided, air-conditioning uses such as above-mentioned power-supply filter.
In the present invention, by adjusting components' placement, by the leakage field magnetic flux of the direction of an electric field of X capacitor and common mode choke Direction is parallel, real there are currently no the near-field coupling for reducing common mode choke and X capacitor on earthed circuit, enhances the decaying of filter Performance, therefore the fade performance of filter is improved under conditions of using identical component, or guaranteeing identical fade performance Under conditions of, component cost can be saved, to effectively solve power-supply filter common mode choke in the prior art and X capacitor The stronger problem of near-field coupling.
Detailed description of the invention
Fig. 1 is a kind of optional structural block diagram of power-supply filter according to an embodiment of the present invention;
Fig. 2 is a kind of wiring diagram of optional printed circuit board top layer of power-supply filter according to an embodiment of the present invention; And
Fig. 3 is a kind of wiring diagram of optional printed circuit board bottom of power-supply filter according to an embodiment of the present invention.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended The example of device and method being described in detail in claims, some aspects of the invention are consistent.
Embodiment 1
A kind of power-supply filter is provided in the preferred embodiment of the invention 1, which can directly apply On to various power devices.Specifically, Fig. 1 shows a kind of optional structural block diagram of the power-supply filter, as shown in Figure 1, should Power-supply filter includes:
Double-layer printing circuit board, wherein the top layer of double-layer printing circuit board includes:
The X capacitor and common mode choke being sequentially connected, wherein the direction of an electric field of X capacitor and the leakage field magnetic of common mode choke Logical direction is parallel.
Common mode choke includes common mode choke magnetic core and common mode choke winding.
In the above-described embodiment, by adjusting components' placement, by the leakage of the direction of an electric field of X capacitor and common mode choke Magnetic flow direction is parallel, real there are currently no the near-field coupling for reducing common mode choke and X capacitor on earthed circuit, enhances filter Fade performance, therefore improve under conditions of using identical component the fade performance of filter, or guaranteeing identical decline Under conditions of subtracting performance, component cost can be saved, to effectively solve power-supply filter common mode choke in the prior art With the stronger problem of near-field coupling of X capacitor.
In one preferred embodiment of the invention, common mode choke uses toroidal core, perpendicular dress (the i.e. annular magnetic of magnetic core Core z-axis axis is parallel with printed circuit board plane), toroidal core winding is preferably with single layer coil, sequence coiling or using butterfly Type winding should be segmented coiling, with insulated with material such as resin plates between section and section such as it is necessory to use lattice coil.
In presently preferred embodiment, above-mentioned level-one filter arrives power outlet according to electric power incoming line Successively arrange X capacitor, common mode choke and Y capacitance element of direction is sequentially connected;Fig. 1 only shows X capacitor and common mode choke;? X capacitor can be continued growing under the conditions of existing, reinforce filter effect.
In another preferred embodiment of the invention, as shown in Fig. 2, X capacitor is connected across the firewire and zero curve of top layer Between.Common mode choke includes: the first winding, is serially connected on the firewire of top layer;Second winding, is serially connected on the zero curve of top layer; Toroidal core, the first winding and the second winding technique are on toroidal core.
Preferably, punched, the electrical connection pass between guarantee upper and lower level via hole is carried out between X capacitor and common mode choke System, play electric current intercommunication, X capacitor enter line position, common mode choke outgoing line position equally carry out it is punched.
Further, the mode that firewire and zero curve are all made of paving copper foil carries out cabling.
Further, as shown in figure 3, the cabling phase of the cabling of the bottom of printed circuit board and the top layer of printed circuit board Together, the cabling of the bottom of printed circuit board is carried out by the way of spreading copper foil.The thickness of copper foil is greater than the electric current of printed circuit board Required copper thickness.
Printed circuit board bottom cabling spreads copper using large area, reduces the impedance on wiring path, corresponding different nodes Electrical safety spacing should be met between difference paving copper, spread the acute angle of copper billet, right angle can be processed into rounded corner.
In upper embodiment, by copper-clad surface large area it is punched, reduce the AC inductance of PCB trace, subtract The spacing electromagnetic radiation of few filter.
Embodiment 2
The power-supply filter provided in 1 based on the above embodiment, additionally provides one kind in the preferred embodiment of the invention 2 Air-conditioning, air-conditioning use such as above-mentioned power-supply filter.
In the above-described embodiment, by adjusting components' placement, by the leakage of the direction of an electric field of X capacitor and common mode choke Magnetic flow direction is parallel, real there are currently no the near-field coupling for reducing common mode choke and X capacitor on earthed circuit, enhances filter Fade performance, therefore improve under conditions of using identical component the fade performance of filter, or guaranteeing identical decline Under conditions of subtracting performance, component cost can be saved, to effectively solve power-supply filter common mode choke in the prior art With the stronger problem of near-field coupling of X capacitor.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or The common knowledge in the art that person's adaptive change follows general principle of the invention and do not invent including the present invention Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by following Claim is pointed out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.

Claims (12)

1. a kind of power-supply filter, including double-layer printing circuit board, which is characterized in that the top layer packet of the double-layer printing circuit board It includes:
The X capacitor and common mode choke being sequentially connected, wherein the leakage of the direction of an electric field and the common mode choke of the X capacitor Magnetic flow direction is parallel.
2. power-supply filter according to claim 1, which is characterized in that the X capacitor and the common mode choke according to The line that enters of the electric current of the top layer is sequentially connected to outlet direction.
3. power-supply filter according to claim 1, which is characterized in that between the X capacitor and the common mode choke It is punched.
4. power-supply filter according to claim 3, which is characterized in that the electric current of the X capacitor enters line position and described The current outlet position of common mode choke is punched.
5. power-supply filter according to claim 4, which is characterized in that the X capacitor is connected across the firewire of the top layer Between zero curve.
6. power-supply filter according to claim 4, which is characterized in that the common mode choke includes:
First winding is serially connected on the firewire of the top layer;
Second winding is serially connected on the zero curve of the top layer;
Toroidal core, first winding and second winding technique are on the toroidal core.
7. power-supply filter according to claim 5 or 6, which is characterized in that the firewire and the zero curve are all made of paving The mode of copper foil carries out cabling.
8. power-supply filter according to claim 7, which is characterized in that the cabling of the bottom of the printed circuit board and institute The cabling for stating the top layer of printed circuit board is identical, and the cabling of the bottom of the printed circuit board is carried out by the way of spreading copper foil.
9. power-supply filter according to claim 8, which is characterized in that the thickness of the copper foil is greater than the printed circuit Copper thickness required by the electric current of plate.
10. power-supply filter according to claim 8, which is characterized in that the bottom of the printed circuit board and the print The cabling of the top layer of printed circuit board meets electrical safety distance, and the deflection angle of the cabling is all made of rounded corner.
11. power-supply filter according to claim 2, which is characterized in that further include:
Y capacitance, between the common mode choke and the outgoing line position of the electric current of the top layer.
12. a kind of air-conditioning, which is characterized in that the air-conditioning is using the power filter as described in any one of claims 1 to 11 Device.
CN201910147083.XA 2019-02-27 2019-02-27 Power-supply filter and air-conditioning Pending CN109819588A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910147083.XA CN109819588A (en) 2019-02-27 2019-02-27 Power-supply filter and air-conditioning

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910147083.XA CN109819588A (en) 2019-02-27 2019-02-27 Power-supply filter and air-conditioning

Publications (1)

Publication Number Publication Date
CN109819588A true CN109819588A (en) 2019-05-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910147083.XA Pending CN109819588A (en) 2019-02-27 2019-02-27 Power-supply filter and air-conditioning

Country Status (1)

Country Link
CN (1) CN109819588A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110277907A (en) * 2019-06-17 2019-09-24 珠海格力电器股份有限公司 A kind of filter, power supply and its filtering method
CN110601516A (en) * 2019-09-09 2019-12-20 珠海格力电器股份有限公司 Filtering device, power supply and filtering method thereof
CN112910247A (en) * 2021-01-25 2021-06-04 珠海格力电器股份有限公司 Filter device and refrigerator
CN113315366A (en) * 2021-05-13 2021-08-27 珠海格力电器股份有限公司 Filtering device, electrical equipment and filtering method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110277907A (en) * 2019-06-17 2019-09-24 珠海格力电器股份有限公司 A kind of filter, power supply and its filtering method
CN110601516A (en) * 2019-09-09 2019-12-20 珠海格力电器股份有限公司 Filtering device, power supply and filtering method thereof
CN112910247A (en) * 2021-01-25 2021-06-04 珠海格力电器股份有限公司 Filter device and refrigerator
CN113315366A (en) * 2021-05-13 2021-08-27 珠海格力电器股份有限公司 Filtering device, electrical equipment and filtering method thereof

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