CN105633966A - Electromagnetic interference suppression circuit and equipment - Google Patents
Electromagnetic interference suppression circuit and equipment Download PDFInfo
- Publication number
- CN105633966A CN105633966A CN201610158080.2A CN201610158080A CN105633966A CN 105633966 A CN105633966 A CN 105633966A CN 201610158080 A CN201610158080 A CN 201610158080A CN 105633966 A CN105633966 A CN 105633966A
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- China
- Prior art keywords
- electric capacity
- electromagnetic interference
- filter unit
- circuit
- inductance
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The invention discloses an electromagnetic interference suppression circuit and equipment. The electromagnetic interference suppression circuit comprises a first filtering unit and a second filtering unit, which are the same in structure and are symmetrically arranged, wherein the first filtering unit is connected with a power grid and is used for carrying out filtering treatment on electromagnetic interference at the power grid side; and the second filtering unit is connected with a power supply end of electric equipment and is used for carrying out filtering treatment on the electromagnetic interference generated by the electric equipment. The electromagnetic interference suppression circuit and equipment effectively suppress transmission of the electromagnetic interference at the power grid side to the electric equipment side, and also effectively suppress transmission of the electromagnetic interference generated by the electric equipment to the power grid to interfere other electric equipment, so that the working reliability of the power grid and the electric equipment is improved; the circuit structure is simple; and the cost is low.
Description
Technical field
The present invention relates to electronic technology field, in particular to a kind of electromagnetic interference suppression circuit and equipment.
Background technology
In recent years, along with economic develop rapidly, various electronics, household electrical appliance, radioactivity Medical Instruments and science surveying instrument emerge in multitude, and the electric network noise interference that various electronics brings is day by day serious and forms a kind of public hazards.
Usually, the interfering energy that electrical network produces is transmitted to electronic and electrical equipment inside by supply lead, and the interference that electronic and electrical equipment inside produces simultaneously also can be transmitted to electrical network by supply lead, other electrical equipments on interference electrical network. When electromagnetic interference energy reaches certain value, the operation irregularity of other electrical equipments on electronic and electrical equipment self and electrical network will be caused.
Summary of the invention
One of technical problem that the present invention is intended to solve in correlation technique at least to a certain extent.
For this reason, it is an object of the present invention to propose a kind of electromagnetic interference suppression circuit, this circuit and effective inhibit the electromagnetic interference of grid side to be transmitted to electrical equipment side, the electromagnetic interference effectively inhibiting electrical equipment to produce again is transmitted to electrical network, and disturb other electrical equipments, improve electrical network and the reliability of electrical equipment work, and circuit structure is simple, cost is low.
Another object of the present invention is to propose a kind of electromagnetic interference suppression equipment.
In order to achieve the above object, one aspect of the present invention embodiment proposes a kind of electromagnetic interference suppression circuit, comprising: structure is identical and symmetrically arranged first filter unit and the 2nd filter unit; Described first filter unit, is connected with electrical network, for the electromagnetic interference of grid side is carried out filtering process; Described 2nd filter unit, is connected with the power supply end of electrical equipment, carries out filtering process for electromagnetic interference electrical equipment produced.
The electromagnetic interference suppression circuit that the embodiment of the present invention proposes, comprise that structure is identical and symmetrically arranged first filter unit and the 2nd filter unit, first filter unit is connected with electrical network, for the electromagnetic interference of grid side is carried out filtering process, 2nd filter unit, it is connected with the power supply end of electrical equipment, carries out filtering process for electromagnetic interference electrical equipment produced. Thus namely effective inhibit the electromagnetic interference of grid side to be transmitted to electrical equipment side, the electromagnetic interference effectively inhibiting electrical equipment to produce again is transmitted to electrical network, and disturb other electrical equipments, it is to increase the reliability of electrical network and electrical equipment work, and circuit structure is simple, cost is low.
According to one embodiment of present invention, described circuit, also comprises: the 3rd filter unit being connected in parallel with described first filter unit and the 2nd filter unit;
Described 3rd filter unit comprises the first electric capacity being connected in series and the 2nd electric capacity, and the tie point of described first electric capacity and the 2nd electric capacity is connected to ground.
According to one embodiment of present invention, described first electric capacity is identical with the structure and parameter of the 2nd electric capacity.
According to one embodiment of present invention, described 3rd filter unit, also comprises the 3rd electric capacity with described first electric capacity and the 2nd Capacitance parallel connection.
According to one embodiment of present invention, described first filter unit, comprising: the first inductance and the 4th electric capacity;
One couple end of the same name of described first inductance is connected with electrical network after being connected in parallel with the two ends of described 4th electric capacity respectively.
According to one embodiment of present invention, described 2nd filter unit, comprising: the 2nd inductance and the 5th electric capacity;
One couple end of the same name of described 2nd inductance is connected with the power supply end of electrical equipment after being connected in parallel with the two ends of described 5th electric capacity respectively.
According to one embodiment of present invention, described first inductance is identical with the structure and parameter of described 2nd inductance.
According to one embodiment of present invention, it is identical that described first inductance comprises, with described 2nd inductance, the number of turn being wound on same closed magnet ring respectively, and two coils that direction is contrary.
According to one embodiment of present invention, described 3rd electric capacity, the 4th electric capacity are identical with the structure and parameter of the 5th electric capacity.
In order to achieve the above object, further aspect of the present invention embodiment proposes a kind of electromagnetic interference suppression equipment, and it comprises above-mentioned electromagnetic interference suppression circuit.
The electromagnetic interference suppression equipment that the embodiment of the present invention proposes, effectively the electromagnetic interference of grid side is inhibited to be transmitted to electrical equipment side, the electromagnetic interference effectively inhibiting electrical equipment to produce again is transmitted to electrical network, and disturb other electrical equipments, improve electrical network and the reliability of electrical equipment work, and circuit structure is simple, cost is low.
Accompanying drawing explanation
Fig. 1 is an electromagnetic interference suppression circuit structural representation of the application;
Fig. 2 is another electromagnetic interference suppression circuit structural representation of the application;
Fig. 3 is the electromagnetic interference suppression equipment structural representation of the application's embodiment.
Reference numeral:
First filter unit 1; 2nd filter unit 2; Electrical network 3;
Electrical equipment 4; First inductance 11; 4th electric capacity 12;
2nd inductance 21; 5th electric capacity 22; 3rd filter unit 5;
First electric capacity 51; 2nd electric capacity 52; 3rd electric capacity 53;
Electromagnetic interference suppression equipment 6; Electromagnetic interference suppression circuit 7.
Embodiment
Being described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish. It is exemplary below by the embodiment being described with reference to the drawings, it is intended to for explaining the present invention, and limitation of the present invention can not be interpreted as.
Below with reference to the accompanying drawings come to describe in detail electromagnetic interference suppression circuit and equipment that the embodiment of the present invention proposes.
Fig. 1 is the structural representation of a kind of electromagnetic interference suppression circuit of the embodiment of the present invention.
As shown in Figure 1, the electromagnetic interference suppression circuit that the present embodiment provides comprises: structure is identical and symmetrically arranged first filtered electrical unit 1 and the 2nd filter unit 2.
Wherein, described first filter unit 1, is connected with electrical network 3, and for the electromagnetic interference of grid side is carried out filtering process, described 2nd filter unit 2, is connected with the power supply end of electrical equipment 4, carries out filtering process for electromagnetic interference electrical equipment produced.
Specifically, electromagnetic interference generally includes common mode interference and DM EMI two kinds, therefore in order to the electromagnetic interference that grid side and electrical equipment side produce all be filtered out, the first filter unit 1 and the 2nd filter unit 2 need namely to comprise common mode interference and suppress assembly, comprise again DM EMI and suppress assembly.
For example, Fig. 2 is another electromagnetic interference suppression circuit structural representation of the present invention. As shown in Figure 2, the first filter unit 1 comprises: the first inductance 11 and the 4th electric capacity 12.
Wherein, one couple end of the same name of described first inductance 11 is connected with electrical network after being connected in parallel with the two ends of described 4th electric capacity 12 respectively.
Accordingly, described 2nd filter unit 2, comprising: the 2nd inductance 21 and the 5th electric capacity 22.
Wherein, one couple end of the same name of described 2nd inductance 21 is connected with the power supply end of electrical equipment 4 after being connected in parallel with the two ends of described 5th electric capacity 22 respectively.
It is understandable that, in the first filter unit 1 and the 2nd filter unit 2,4th electric capacity 12 and the 5th electric capacity 22 are high-frequency bypass capacitor, such as adopt thin-film capacitor, are respectively used between filtering two input power cord and DM EMI that two electric terminals return between supply lead.
First inductance 11 and the 2nd inductance 21 are common mode inductance, the common mode interference being respectively used between filtering electrical network supply lead and ground, and the common mode interference that electrical equipment is powered and held between ground.
Concrete, for reducing the common mode inductance that structure and parameter can be adopted identical of circuit layout cost and difficulty, the first inductance 11 and the 2nd inductance 21. For example, it is identical that the first inductance 11 comprises, with described 2nd inductance 21, the number of turn being wound on same closed magnet ring respectively, and two coils that direction is contrary. Common mode noise current (comprises the ground harassing and wrecking electric current that causes of loop, also place is called longitudinal electric current) when flowing through two coils, and direction is identical, and the magnetic flux of generation is added in the same way, and coil presents high resistance, thus plays the effect suppressing common mode noise.
Preferably, for further the common mode interference in circuit being carried out filtering, between the first filter unit 1 and the 2nd filter unit 2, it is also possible to the 3rd filter unit 5 in parallel.
Described 3rd filter unit 5 comprises the first electric capacity 51 and the 2nd electric capacity 52 that are connected in series, and the tie point of described first electric capacity 51 and the 2nd electric capacity 52 is connected to ground.
Concrete, the first electric capacity 51 and the 2nd electric capacity 52 can adopt ceramic condenser, and the structure and parameter of the first electric capacity 51 and the 2nd electric capacity 52 can be identical. The tie point of the first electric capacity 51 and the 2nd electric capacity 52 is connected to ground, thus common mode interference switches to ground, because common mode noise is high frequency, electric capacity is short-circuit so noise imports ground into from this electric capacity concerning high frequency, thus noise is bypassed.
The common mode interference produced by grid side, after the first filter unit 1 filters, then after the 3rd filter unit 5 and the 2nd filter unit filter, then inputs to electrical equipment, thus effectively inhibits grid side electromagnetic interference on the impact of electrical equipment; Same, the electromagnetic interference that electrical equipment produces, through the filtration of the 2nd filter unit 2, the 3rd filter unit 5 and the first filter unit 1, the electromagnetic interference being transmitted to grid side has also been obtained effective suppression, thus ensure that the reliable operation of other equipment on electrical equipment and electrical network.
In order to strengthen filter effect further, as shown in Figure 2, the 3rd filter unit 5 also comprises: the 3rd electric capacity 53 of described first electric capacity 51 and the 2nd electric capacity 52 parallel connection.
Concrete, the 3rd electric capacity 53 can adopt the electric capacity identical with the 5th electric capacity 22 with the 4th electric capacity 12, is namely all high-frequency bypass capacitor, such as adopts thin-film capacitor, and, its structure and parameter can be identical.
The electromagnetic interference suppression circuit that the embodiment of the present application provides, comprise that structure is identical and symmetrically arranged first filter unit and the 2nd filter unit, first filter unit is connected with electrical network, for the electromagnetic interference of grid side is carried out filtering process, 2nd filter unit, it is connected with the power supply end of electrical equipment, carries out filtering process for electromagnetic interference electrical equipment produced. Thus namely effective inhibit the electromagnetic interference of grid side to be transmitted to electrical equipment side, the electromagnetic interference effectively inhibiting electrical equipment to produce again is transmitted to electrical network, and disturb other electrical equipments, it is to increase the reliability of electrical network and electrical equipment work, and circuit structure is simple, cost is low.
Fig. 3 is the electromagnetic interference suppression equipment structural representation of the application's embodiment. As shown in Figure 3, this electromagnetic interference suppression equipment 6 comprises electromagnetic interference suppression circuit 7.
Wherein, the structure of electromagnetic interference suppression circuit 7 can realize with reference to the form shown in above-mentioned Fig. 1 or Fig. 2, repeats no more herein.
In order to facilitate the use of this equipment, input, the output interface of this equipment can adopt implemented in many forms, such as plug formula, or other standards interface shape. When electrical equipment needs access electrical network, first the output terminal of this equipment is connected with the power supply end of electrical equipment, then the input terminus of this equipment is being connected with electrical network, even if electrical equipment is connected with electrical network by this electromagnetic interference suppression equipment, thus suppresses Conducted Electromagnetic Interference between electrical equipment and electrical network.
The electromagnetic interference suppression equipment that the present embodiment provides, effectively the electromagnetic interference of grid side is inhibited to be transmitted to electrical equipment side, the electromagnetic interference effectively inhibiting electrical equipment to produce again is transmitted to electrical network, and disturb other electrical equipments, improve electrical network and the reliability of electrical equipment work, and circuit structure is simple, cost is low.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", it is based on orientation shown in the drawings or position relation that the orientation of the instruction such as " circumference " or position are closed, it is only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device referred to or element must have specific orientation, with specific orientation structure and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " the 2nd " are only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technology feature. Thus, be limited with " first ", the feature of " the 2nd " can express or implicit comprise at least one this feature. In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, such as, it is possible to be fixedly connected with, it is also possible to be removably connect, or integral; Can be mechanically connected, it is also possible to be electrical connection; Can be directly be connected, it is also possible to be indirectly connected by intermediary, it is possible to be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction. For the ordinary skill in the art, it is possible to understand above-mentioned term concrete implication in the present invention according to particular case.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact. And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature. Fisrt feature second feature " under ", " lower section " and " below " can be fisrt feature immediately below second feature or tiltedly lower section, or only represent that fisrt feature level height is less than second feature.
In the description of this specification sheets, at least one embodiment that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to be contained in the present invention in conjunction with concrete feature, structure, material or feature that this embodiment or example describe or example. In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example. And, the concrete feature of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner. In addition, when not conflicting, the feature of the different embodiment described in this specification sheets or example and different embodiment or example can be carried out combining and combining by the technician of this area.
Although above it has been shown and described that embodiments of the invention, it is understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and above-described embodiment can be changed, revises, replace and modification by the those of ordinary skill of this area within the scope of the invention.
Claims (10)
1. an electromagnetic interference suppression circuit, it is characterised in that, comprising: structure is identical and symmetrically arranged first filter unit and the 2nd filter unit;
Described first filter unit, is connected with electrical network, for the electromagnetic interference of grid side is carried out filtering process;
Described 2nd filter unit, is connected with the power supply end of electrical equipment, carries out filtering process for electromagnetic interference electrical equipment produced.
2. circuit as claimed in claim 1, it is characterised in that, also comprise: the 3rd filter unit being connected in parallel with described first filter unit and the 2nd filter unit;
Described 3rd filter unit comprises the first electric capacity being connected in series and the 2nd electric capacity, and the tie point of described first electric capacity and the 2nd electric capacity is connected to ground.
3. circuit as claimed in claim 2, it is characterised in that, described first electric capacity is identical with the structure and parameter of the 2nd electric capacity.
4. circuit as claimed in claim 2, it is characterised in that, described 3rd filter unit, also comprises the 3rd electric capacity with described first electric capacity and the 2nd Capacitance parallel connection.
5. the circuit as described in as arbitrary in claim 1-4, it is characterised in that, described first filter unit, comprising: the first inductance and the 4th electric capacity;
One couple end of the same name of described first inductance is connected with electrical network after being connected in parallel with the two ends of described 4th electric capacity respectively.
6. circuit as claimed in claim 5, it is characterised in that, described 2nd filter unit, comprising: the 2nd inductance and the 5th electric capacity;
One couple end of the same name of described 2nd inductance is connected with the power supply end of electrical equipment after being connected in parallel with the two ends of described 5th electric capacity respectively.
7. circuit as claimed in claim 6, it is characterised in that, described first inductance is identical with the structure and parameter of described 2nd inductance.
8. circuit as claimed in claim 7, it is characterised in that, it is identical that described first inductance comprises, with described 2nd inductance, the number of turn being wound on same closed magnet ring respectively, and two coils that direction is contrary.
9. circuit as claimed in claim 7, it is characterised in that, described 3rd electric capacity, the 4th electric capacity are identical with the structure and parameter of the 5th electric capacity.
10. an electromagnetic interference suppression equipment, it is characterised in that, comprise as arbitrary in claim 1-9 as described in capacitance interference suppress circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610158080.2A CN105633966A (en) | 2016-03-18 | 2016-03-18 | Electromagnetic interference suppression circuit and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610158080.2A CN105633966A (en) | 2016-03-18 | 2016-03-18 | Electromagnetic interference suppression circuit and equipment |
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| Publication Number | Publication Date |
|---|---|
| CN105633966A true CN105633966A (en) | 2016-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610158080.2A Pending CN105633966A (en) | 2016-03-18 | 2016-03-18 | Electromagnetic interference suppression circuit and equipment |
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| CN (1) | CN105633966A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108896846A (en) * | 2018-06-01 | 2018-11-27 | 中国人民解放军海军工程大学 | It can measure the apparatus and method of high-voltage system Conduction Interference |
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| CN2561159Y (en) * | 2001-08-09 | 2003-07-16 | 神达电脑股份有限公司 | Electromagnetic interference wave filter for power source supplier |
| CN201238083Y (en) * | 2008-08-06 | 2009-05-13 | 四川九洲电器集团有限责任公司 | Power cord with power supply noise filter |
| CN202026516U (en) * | 2011-04-08 | 2011-11-02 | 王孝强 | Electronic ballast input filtering loop |
| CN202353210U (en) * | 2011-10-24 | 2012-07-25 | 成都芮捷科技发展有限责任公司 | Filtering protection output circuit |
| US20150029766A1 (en) * | 2013-07-29 | 2015-01-29 | Enphase Energy, Inc. | Electromagnetic compatibility filter with an integrated power line communication interface |
-
2016
- 2016-03-18 CN CN201610158080.2A patent/CN105633966A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2561159Y (en) * | 2001-08-09 | 2003-07-16 | 神达电脑股份有限公司 | Electromagnetic interference wave filter for power source supplier |
| CN201238083Y (en) * | 2008-08-06 | 2009-05-13 | 四川九洲电器集团有限责任公司 | Power cord with power supply noise filter |
| CN202026516U (en) * | 2011-04-08 | 2011-11-02 | 王孝强 | Electronic ballast input filtering loop |
| CN202353210U (en) * | 2011-10-24 | 2012-07-25 | 成都芮捷科技发展有限责任公司 | Filtering protection output circuit |
| US20150029766A1 (en) * | 2013-07-29 | 2015-01-29 | Enphase Energy, Inc. | Electromagnetic compatibility filter with an integrated power line communication interface |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108896846A (en) * | 2018-06-01 | 2018-11-27 | 中国人民解放军海军工程大学 | It can measure the apparatus and method of high-voltage system Conduction Interference |
| CN108896846B (en) * | 2018-06-01 | 2020-11-13 | 中国人民解放军海军工程大学 | Device and method for measuring conducted interference of high-voltage system |
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Application publication date: 20160601 |