CN204157216U - Electromagnetic interference filter - Google Patents
Electromagnetic interference filter Download PDFInfo
- Publication number
- CN204157216U CN204157216U CN201420611121.5U CN201420611121U CN204157216U CN 204157216 U CN204157216 U CN 204157216U CN 201420611121 U CN201420611121 U CN 201420611121U CN 204157216 U CN204157216 U CN 204157216U
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- Prior art keywords
- electromagnetic interference
- interference filter
- lid
- outside
- electric current
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Abstract
The Electromagnetic interference filter that the utility model provides, comprise lid, the inductor of at least two interconnective different frequencies, the first electric capacity, the second electric capacity, input terminal and lead-out terminal, the electric current being provided with the electric current that can increase Electromagnetic interference filter in lid increases structure; At least two inductors, the second electric capacity are divided into the two ends of lid portion inside; Input terminal, lead-out terminal be arranged in respectively lid two outside.Structure is increased owing to being provided with electric current in lid, structure is increased by electric current, make the electric current flowing through lid portion inside parts be greater than the electric current of the cover body structure of prior art, reduce the D.C. resistance of Electromagnetic interference filter with this, thus reduce the power consumption of Electromagnetic interference filter; Meanwhile, owing to being provided with the inductor of at least two interconnective different frequencies, to suppress different frequency bands, relative to prior art single inductor structure is set, can effectively make bandwidth reach 100KHz-2GHz from 100KHz-1GHz.
Description
Technical field
The utility model relates to the technical field of filter, particularly relates to a kind of Electromagnetic interference filter.
Background technology
Electromagnetic interference (EMI) filter is a kind of low pass filter be made up of inductance and electric capacity, and it can allow the useful signal of low frequency pass through smoothly, and has inhibitory action to High-frequency Interference.
Electromagnetic interference filter is primarily of lid and inductor, the electric capacity composition of being located at lid portion inside, wherein, current cover body structure is mostly injection mo(u)lding, then any process can not be remake, and this kind of cover body structure, when electric current flows through lid portion inside parts, larger D.C. resistance can be produced, not only cause Electromagnetic interference filter to produce larger power consumption, and easily cause lid intensification heating, reduce the dependability of Electromagnetic interference filter; Further, be mostly only provided with single inductor due to current Electromagnetic interference filter, and single inductor is difficult to suppress different frequency bands.
Therefore, be necessary to provide a kind of technological means to address the aforementioned drawbacks.
Utility model content
The purpose of this utility model is the defect overcoming prior art, the Electromagnetic interference filter provided, the Electromagnetic interference filter structure of prior art can be solved easily because larger D.C. resistance can be produced when electric current flows through lid portion inside parts, so that cause Electromagnetic interference filter to produce larger power consumption and lid easily to heat up the problem of heating, and the Electromagnetic interference filter solving prior art is difficult to suppress the problem of different frequency bands.
The utility model is achieved in that Electromagnetic interference filter, comprising:
Lid, to have outside described lid outside first and relative to second of this first arranged outside outside, the second end that at least there is in described lid first end and arrange relative to this first end, and the electric current being also provided with the electric current that can increase described Electromagnetic interference filter in described lid increases structure;
At least two inductors with different frequency, are located at described first end and each described inductor is interconnected;
First electric capacity, is located at described lid portion inside and touches with at least two described inductors;
Second electric capacity, is located at described second end and is adjacent at least two described inductors;
Input terminal, is connected at least two described inductors outside being arranged in described first; And
Lead-out terminal, is connected to described second electric capacity outside being arranged in described second.
Particularly, it is be attached to the conductive metal layer on described lid inwall that described electric current increases structure, and at least two described inductors are connected with described conductive metal layer by its inner coil arranged.
Particularly, described inductor is provided with three.
Further, arbitrary described inductor includes inductance core, and described inductance core is ellipsoidal structure.
Particularly, described first electric capacity is slice structure.
Particularly, described second electric capacity is feedthrough capacitor.
Further, described feedthrough capacitor is square structure.
Further, the outside of described feedthrough capacitor is provided with and the bandwidth of described Electromagnetic interference filter bandwidth can be suppressed to suppress structure.
Preferably, described bandwidth suppresses structure to be plate the slicker solder layer be located on outside described feedthrough capacitor.
Particularly, described lid comprises upper cover and lower cover, and the both sides of described upper cover are provided with grab, and the both sides of described lower cover are provided with the draw-in groove of clamping corresponding to described grab, and described upper cover is engaged with described lower cover with described draw-in groove clamping by described grab.
The technique effect of Electromagnetic interference filter of the present utility model is: increase structure owing to being provided with electric current in lid of the present utility model, structure is increased by electric current, the electric current flowing through lid portion inside parts is made to be greater than the electric current of the cover body structure of prior art, reduce the D.C. resistance of Electromagnetic interference filter with this, thus reduce the power consumption of Electromagnetic interference filter; Meanwhile, because the utility model is provided with the inductor of at least two interconnective different frequencies, to suppress different frequency bands, relative to prior art single inductor structure is set, can effectively make bandwidth reach 100KHz-2GHz from 100KHz-1GHz.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the Electromagnetic interference filter of the utility model embodiment;
Fig. 2 is the schematic diagram of another angle of the Electromagnetic interference filter of the utility model embodiment;
Fig. 3 be in Fig. 2 A-A to sectional view;
Fig. 4 is the exploded view of the Electromagnetic interference filter of the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Refer to Fig. 1 to Fig. 4, below the most preferred embodiment of Electromagnetic interference filter of the present utility model is set forth.
The Electromagnetic interference filter 100 of the present embodiment, comprise inductor 20, first electric capacity 30, second electric capacity 40 of lid 10, at least two interconnective different frequencies, input terminal 50 and lead-out terminal 60, below each parts of Electromagnetic interference filter 100 be further described:
To have outside lid 10 outside first and relative to second of this first arranged outside outside, the second end that at least there is in lid 10 first end and arrange relative to this first end, and the electric current being also provided with the electric current that can increase Electromagnetic interference filter 100 in lid 10 increases structure 11, in addition, the height of lid 10 is 4mm, and in this lid 10, being provided with an installation cavity, the installing space of this installation cavity is 2.0-2.5mm;
These at least two inductors 20 with different frequency are located at the first end of lid 10 and each inductor 20 is interconnected;
First electric capacity 30 is located at lid 10 inside and is touched with at least two inductors 20;
Second electric capacity 40 is located at the second end of lid 10 and is adjacent at least two inductors 20;
Input terminal 50 be arranged in lid 10 first outside and be connected at least two inductors 20;
Lead-out terminal 60 to be arranged in outside second outside relative to first of lid 10 and to be connected to the second electric capacity 40.
Structure 11 is increased owing to being provided with electric current in the lid 10 of the present embodiment, structure 11 is increased by electric current, the electric current flowing through lid 10 internal part is made to be greater than the electric current of the cover body structure of prior art, reduce the D.C. resistance of Electromagnetic interference filter 100 with this, thus reduce the power consumption of Electromagnetic interference filter 100; Meanwhile, because the present embodiment is provided with the inductor 20 of at least two interconnective different frequencies, to suppress different frequency bands, relative to prior art single inductor structure is set, can effectively make bandwidth reach 100KHz-2GHz from 100KHz-1GHz.
Refer to Fig. 3, particularly, electric current increases structure 11 for being attached to the conductive metal layer on lid 10 inwall, preferably, as long as be attached with conductive metal layer at least one lid 10 inwall, the current lead-through flowing through lid 10 internal part can be made without hindrance, reduce the D.C. resistance of Electromagnetic interference filter 100, increase the electric current of Electromagnetic interference filter 100 therefrom; In addition, these at least two inductors 20 are connected with conductive metal layer by its inner coil arranged, with the coil making these at least two inductors 20 additionally need not be equipped with conduction connection, as long as the coil that this at least two inductors 20 inside arranges is connected with conductive metal layer, in this, the heating of Electromagnetic interference filter 100 can be reduced to greatest extent.
Refer to Fig. 4, the inductor 20 of the present embodiment is provided with three, certainly, also according to actual needs, can arrange more than three.Wherein, arbitrary inductor 20 includes inductance core 21, and in order to make the size of inductor 20 less and inside the installation cavity being arranged on lid 10 more suitably, this inductance core 21 is ellipsoidal structure, is highly 1.9mm.
Preferably, first electric capacity 30 of the present embodiment is slice structure, that is, this first electric capacity 30 is sheet capacitor, and sheet capacitor has features such as capacity is large, volume is little, easy chip type.And for the ease of drawing materials, this sheet capacitor is chip-type laminated ceramic dielectric electric capacity, wherein, chip-type laminated ceramic capacitor (MLCC), be called for short chip-type laminated capacitor (or further referred to as chip capacitor), be superimposed together in the mode of dislocation by the ceramic dielectric diaphragm of printed electrode (interior electrode), ceramic chip is formed through disposable high temperature sintering, metal level (external electrode) is sealed up again at the two ends of chip, thus form the structure of a similar only stone, therefore be also monolithic capacitor.And the main component of conventional ceramic dielectric to be MgTiO3, CaTiO3, SrTiO3 and TiO2 add again appropriate rare-earth oxides etc. are formulated, be characterized in medium coefficient compared with large, dielectric loss is low, temperature coefficient is little, ambient temperature is applied widely and high frequency characteristics is good, be used in the higher occasion of requirement (I class ceramic capacitor).
Referring again to Fig. 4, the second electric capacity 40 is feedthrough capacitor, and feedthrough capacitor to be one be mainly used on metal decking, be mainly used in the filtering device suppressing high-frequency harmonic to disturb signal, power line etc.
In order to make the size of feedthrough capacitor less and inside the installation cavity being arranged on lid 10 more suitably, feedthrough capacitor is square structure, that is, feedthrough capacitor has a square casing, and the height of this square casing is 2.2mm.
Have plenty of again, the outside of feedthrough capacitor is provided with and the bandwidth of Electromagnetic interference filter 100 bandwidth can be suppressed to suppress structure 41, and suppress structure 41 by this bandwidth, bandwidth is made to suppress required scope, ensure high frequency and the wideband performance of Electromagnetic interference filter 100 with this, and can ensure that bandwidth reaches 100KHz-2GHz further.Preferably, this bandwidth suppresses structure 41 be plate the slicker solder layer be located on outside feedthrough capacitor, is specially, and other except two surfaces that the square casing that the electrode except feedthrough capacitor wears is located in the plating of slicker solder layer are surperficial.
Please continue to refer to Fig. 4, each internal part for the ease of Electromagnetic interference filter 100 is installed on lid 10, the lid 10 of the present embodiment comprises upper cover 12 and lower cover 13, the both sides of upper cover 12 are provided with grab 120, the both sides of lower cover 13 are provided with the draw-in groove 13 of clamping corresponding to grab 12, upper cover 12 is engaged with lower cover 13 with draw-in groove 130 clamping by grab 120, be specially, when mounted, as long as each internal part is installed on lower cover 13, after complete, the grab 120 of upper cover 12 is made to be stuck in the draw-in groove 130 of lower cover 13 again, internal part capping can be made to protect, greatly facilitate the installation of installation personnel.
In addition, Electromagnetic interference filter 100 also includes the ground connection Five-gold-sheet being located at lid 10 inside, by this ground connection Five-gold-sheet 70, enables each internal part ground connection being located at lid 10 inside, with the personal safety avoiding internal part to jeopardize user because of charged.
The foregoing is only the utility model preferred embodiment; its structure is not limited to the above-mentioned shape enumerated; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (10)
1. Electromagnetic interference filter, is characterized in that, comprising:
Lid, to have outside described lid outside first and relative to second of this first arranged outside outside, the second end that at least there is in described lid first end and arrange relative to this first end, and the electric current being also provided with the electric current that can increase described Electromagnetic interference filter in described lid increases structure;
At least two inductors with different frequency, are located at described first end and each described inductor is interconnected;
First electric capacity, is located at described lid portion inside and touches with at least two described inductors;
Second electric capacity, is located at described second end and is adjacent at least two described inductors;
Input terminal, is connected at least two described inductors outside being arranged in described first; And
Lead-out terminal, is connected to described second electric capacity outside being arranged in described second.
2. Electromagnetic interference filter as claimed in claim 1, is characterized in that: it is be attached to the conductive metal layer on described lid inwall that described electric current increases structure, and at least two described inductors are connected with described conductive metal layer by its inner coil arranged.
3. Electromagnetic interference filter as claimed in claim 1, is characterized in that: described inductor is provided with three.
4. Electromagnetic interference filter as claimed in claim 3, it is characterized in that: arbitrary described inductor includes inductance core, and described inductance core is ellipsoidal structure.
5. Electromagnetic interference filter as claimed in claim 1, is characterized in that: described first electric capacity is slice structure.
6. Electromagnetic interference filter as claimed in claim 1, is characterized in that: described second electric capacity is feedthrough capacitor.
7. Electromagnetic interference filter as claimed in claim 6, is characterized in that: described feedthrough capacitor is square structure.
8. Electromagnetic interference filter as claimed in claim 6, is characterized in that: the outside of described feedthrough capacitor is provided with and the bandwidth of described Electromagnetic interference filter bandwidth can be suppressed to suppress structure.
9. Electromagnetic interference filter as claimed in claim 8, is characterized in that: described bandwidth suppresses structure to be plate the slicker solder layer be located on outside described feedthrough capacitor.
10. the Electromagnetic interference filter as described in any one of claim 1-9, it is characterized in that: described lid comprises upper cover and lower cover, the both sides of described upper cover are provided with grab, the both sides of described lower cover are provided with the draw-in groove of clamping corresponding to described grab, and described upper cover is engaged with described lower cover with described draw-in groove clamping by described grab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420611121.5U CN204157216U (en) | 2014-10-21 | 2014-10-21 | Electromagnetic interference filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420611121.5U CN204157216U (en) | 2014-10-21 | 2014-10-21 | Electromagnetic interference filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204157216U true CN204157216U (en) | 2015-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420611121.5U Active CN204157216U (en) | 2014-10-21 | 2014-10-21 | Electromagnetic interference filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204157216U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105208806A (en) * | 2015-08-19 | 2015-12-30 | 宁波飞羚电气有限公司 | Clamping hook type modular box |
| CN105592674A (en) * | 2014-10-21 | 2016-05-18 | 深圳振华富电子有限公司 | Electromagnetic interference filter |
-
2014
- 2014-10-21 CN CN201420611121.5U patent/CN204157216U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105592674A (en) * | 2014-10-21 | 2016-05-18 | 深圳振华富电子有限公司 | Electromagnetic interference filter |
| CN105592674B (en) * | 2014-10-21 | 2018-08-28 | 深圳振华富电子有限公司 | Emi filter |
| CN105208806A (en) * | 2015-08-19 | 2015-12-30 | 宁波飞羚电气有限公司 | Clamping hook type modular box |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |