CN207099040U - A kind of power-supply filter - Google Patents
A kind of power-supply filter Download PDFInfo
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- CN207099040U CN207099040U CN201721085594.6U CN201721085594U CN207099040U CN 207099040 U CN207099040 U CN 207099040U CN 201721085594 U CN201721085594 U CN 201721085594U CN 207099040 U CN207099040 U CN 207099040U
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Abstract
The utility model provides a kind of power-supply filter, include shield shell, the first filter circuit plate and the second filter circuit plate are provided with shield shell, the same side wall of shield shell is provided with connected binding post corresponding with the input, output end of the first filter circuit plate, the second filter circuit plate respectively；First filter circuit plate includes common mode filtering inductance L1, common-mode filter L2, common-mode filter L3, filter capacitor C1 and filter capacitor C2, second filter circuit plate includes common mode filtering inductance L1 ', common-mode filter L2 ', common-mode filter L3 ', filter capacitor C1 ' and filter capacitor C2 '；The common mode filtering inductance L1 and common mode filter inductance L1 ' is single magnet ring common mode filtering inductance, line footpath used in its corresponding coiling common mode filtering inductance is more than common-mode filter L2, common-mode filter L3, line footpath used in coiling inductance in common-mode filter L2 ' and common-mode filter L3 '；The beneficial effects of the utility model are：It is compact-sized, compact, it is easy to use.
Description
Technical field
It the utility model is related to filter apparatus field, and in particular to a kind of power-supply filter.
Background technology
The importation of electronic equipment internal is provided with filtration module under normal circumstances, but in the case of electronic countermeasure, output
The impacted maximum of power supply institute of power supply, the filtration module that electronic equipment carries in itself is difficult to meet filtering strength requirement, therefore needs
External wave filter is wanted to use；And existing scalar filter volume is larger, need two wave filters using when generally require it is external
Line, influence to filter output effect, and be difficult to reliably be fixedly mounted under narrow working space, influence using effect, to solve
These problems, it is necessary to propose a kind of new wave filter.
Utility model content
For the deficiency in the presence of prior art, the utility model provides a kind of compact, electricity easy to use
Source filter.
To achieve the above object, the utility model employs following technical scheme：
A kind of power-supply filter, comprising shield shell, the first filter circuit plate and the second filtered electrical are provided with shield shell
Road plate, the same side wall of shield shell be provided with respectively with the first filter circuit plate, the input of the second filter circuit plate, output
The corresponding connected binding post in end；First filter circuit plate includes common mode filtering inductance L1, common-mode filter L2, common mode filter
Ripple device L3, filter capacitor C1 and filter capacitor C2, second filter circuit plate include common mode filtering inductance L1 ', common mode filtering
Device L2 ', common-mode filter L3 ', filter capacitor C1 ' and filter capacitor C2 '；Wherein, the common mode filtering in the first filter circuit plate
Inductance L1, common-mode filter L2, common-mode filter L3 sequential series, filter capacitor C1 and filter capacitor C2 are parallel with one another in common mode
Filter inductance L1 and common-mode filter L2 connection end；Common mode filtering inductance L1 ', common-mode filter in second filter circuit plate
L2 ', common-mode filter L3 ' sequential series, common mode filtering inductance L1 ', common-mode filter L2 ' in the second filter circuit plate are together
Mode filter L3 ' sequential series, filter capacitor C1 ' and filter capacitor C2 ' is parallel with one another to be filtered in common mode filtering inductance L1 ' and common mode
Ripple device L2 ' connection end；The common mode filtering inductance L1 and common mode filter inductance L1 ' is single magnet ring common mode filtering inductance, its
Line footpath used in corresponding coiling common mode filtering inductance is more than common-mode filter L2, common-mode filter L3, common-mode filter L2 ' and
Line footpath used in coiling inductance in common-mode filter L3 '；Common-mode filter L2, common-mode filter L3, common-mode filter L2 ' with
Common-mode filter L3 ' is integrated form common-mode filter；In the first filter circuit plate, common-mode filter L2 and common-mode filter
L3 is in the same side, the extended line on filter capacitor C1 and filter capacitor C2 sides where the same side, filter capacitor C1, filter capacitor C2
Intersected vertically with the extended line on side where common-mode filter L2, common-mode filter L3 and form semi-surrounding structure；Common mode filtering electricity
Sense L1 is in forms semi-surrounding structure by common-mode filter L2, common-mode filter L3, filter capacitor C1 and filter capacitor C2
Open end, and close to common-mode filter L2, common-mode filter L3, filter capacitor C1 and filter capacitor C2；In the second filter circuit
On plate, common-mode filter L2 ' and common-mode filter L3 ' is in the same side, filter capacitor C1 ' and filter capacitor C2 ' in the same side, filter
Where ripple electric capacity C1 ', filter capacitor C2 ' while extended line and common-mode filter L2 ', common-mode filter L3 ' where while extension
Line intersects vertically and forms semi-surrounding structure；Common mode filtering inductance L1 ' is in by common-mode filter L2 ', common-mode filter L3 ',
Filter capacitor C1 ' and filter capacitor C2 ' form the open end of semi-surrounding structure, and close to common-mode filter L2 ', common mode filtering
Device L3 ', filter capacitor C1 ' and filter capacitor C2 '.
The utility model is integrated with two wave filters on a shield shell, the first filter circuit plate and the second filtered electrical
The structure design of road plate decreases the area of circuit board, so as to be able to the volume reduction of wave filter on the whole；Due to input
Output end is each provided at the same side, on the one hand facilitates line to use, on the other hand, it is not necessary to the relative both sides point in filter circuit plate
Not She Zhi input terminal, lead-out terminal, outside increase wiring need not be also drawn out in a manner of hand sealing wire again and reserves redundancy
Space, be easy to the geometries shrink of wave filter；In first filter circuit plate and the second filter circuit plate, input stage employs big line
The common mode filtering inductance of footpath coiling, coordinate two filter capacitors in parallel so that wave filter can absorb and bear larger electromagnetism
Interference impact；In addition, the design of two individual screen chambers of shield shell also contributes to reduce electromagnetic interference, and it is caused
The secondary radiation that leaks, in the environment of electronic countermeasure, is also well positioned to meet the function of electromagnetic compatibility and em filtering.
Compared to prior art, the utility model has the advantages that：
(1) it is, compact-sized, compact, it is easy to use；
(2), filter effect and Electro Magnetic Compatibility are all good；
(3) after, integrally filling thermal conductive insulation glue in shield shell, thermal conductive insulation glue is integrally formed with filter circuit plate, both surely
It is Gu reliable, it is thus also avoided that bolt mounting structure needs increased shell space, reduces wave filter volume.
Brief description of the drawings
Fig. 1 is the structural representation of power-supply filter in embodiment.
Fig. 2 is the circuit theory diagrams of the first filter circuit plate in embodiment.
Embodiment
Below in conjunction with the accompanying drawings and embodiment further illustrates to the technical scheme in the utility model.
As illustrated, the utility model proposes a kind of power-supply filter, comprising shield shell, as shown in figure 1, shielding case
Body is made up of lower cover 1 and upper lid 2, the separate first chamber 101 in space and second chamber 102 in lower cover 1, in first chamber
The first filter circuit plate 11 is provided with 101, the second filter circuit plate 12 is provided with second chamber 102, in the same side of lower cover 1
Wall is provided with connected wiring corresponding with the input, output end of the first filter circuit plate 11, the second filter circuit plate 12 respectively
Terminal 3；First filter circuit plate 11 includes common mode filtering inductance L1, common-mode filter L2, common-mode filter L3, filter capacitor C1
With filter capacitor C2, second filter circuit plate 12 includes common mode filtering inductance L1 ', common-mode filter L2 ', common-mode filter
L3 ', filter capacitor C1 ' and filter capacitor C2 '；As shown in Fig. 2 wherein, common mode filtering inductance L1 in the first filter circuit plate,
Common-mode filter L2, common-mode filter L3 sequential series, filter capacitor C1 and filter capacitor C2 are parallel with one another in common mode filtering electricity
Feel L1 and common-mode filter L2 connection end；The connection of the connected mode of second filter circuit plate 12 and the first filter circuit plate 11
Mode is identical, common mode filtering inductance L1 ', common-mode filter L2 ', common-mode filter L3 ' orders in the second filter circuit plate 12
Connect, common mode filtering inductance L1 ', the common-mode filter L2 ' in the second filter circuit plate and common-mode filter L3 ' sequential series,
Filter capacitor C1 ' and filter capacitor C2 ' is parallel with one another in common mode filtering inductance L1 ' and common-mode filter L2 ' connection end；It is described
Common mode filtering inductance L1 and common mode filter inductance L1 ' is single magnet ring common mode filtering inductance, its corresponding coiling common mode filtering inductance
Used line footpath is more than common-mode filter L2, common-mode filter L3, coiling in common-mode filter L2 ' and common-mode filter L3 '
Line footpath used in inductance, for absorbing high-power or larger interference strength clutter；Common-mode filter L2, common-mode filter
L3, common-mode filter L2 ' and common-mode filter L3 ' are integrated form common-mode filter, before absorbing smaller power or passing through
Remaining clutter after level filtering；In the first filter circuit plate 11, common-mode filter L2 and common-mode filter L3 is in the same side, filter
The extended line and common-mode filter on ripple electric capacity C1 and filter capacitor C2 sides where the same side, filter capacitor C1, filter capacitor C2
The extended line on side where L2, common-mode filter L3 intersects vertically and forms semi-surrounding structure；Common mode filtering inductance L1 is in by altogether
Mode filter L2, common-mode filter L3, filter capacitor C1 and filter capacitor C2 form the open end of semi-surrounding structure, and close to
Common-mode filter L2, common-mode filter L3, filter capacitor C1 and filter capacitor C2；In the second filter circuit plate 12, common mode filter
Ripple device L2 ' and common-mode filter L3 ' in the same side, filter capacitor C1 ' and filter capacitor C2 ' in the same side, filter capacitor C1 ',
Where filter capacitor C2 ' while extended line intersected vertically with extended line when common-mode filter L2 ', common-mode filter L3 ' place
And form semi-surrounding structure；Common mode filtering inductance L1 ' is in by common-mode filter L2 ', common-mode filter L3 ', filter capacitor C1 '
The open end of semi-surrounding structure is formed with filter capacitor C2 ', and close to common-mode filter L2 ', common-mode filter L3 ', is filtered
Electric capacity C1 ' and filter capacitor C2 '；First filter circuit plate 11 and the arrangements of components in the second filter circuit plate 12 are effectively sharp
With space, reduce the area of the first filter circuit plate, also allow for changing common mode filtering inductance for the requirement of different input stages
L1 and common mode filter inductance L1 '；In use, the first filter circuit plate 11 is placed in first chamber 101, the second filter circuit plate 12
After being placed in second chamber, thermal conductive insulation glue is filled, then upper lid 2 is fixedly connected with lower cover 1 and is combined into a complete shield shell
.
Finally illustrate, above example is only unrestricted to illustrate the technical solution of the utility model, although ginseng
The utility model is described in detail according to preferred embodiment, it will be understood by those within the art that, can be to this
The technical scheme of utility model is modified or equivalent substitution, without departing from the objective and model of technical solutions of the utility model
Enclose, it all should cover among right of the present utility model.
Claims (4)
1. a kind of power-supply filter, includes shield shell, it is characterised in that：The first filter circuit plate and the is provided with shield shell
Two filter circuit plates, the same side wall of shield shell be provided with respectively with the first filter circuit plate, the second filter circuit plate it is defeated
Enter end, the corresponding connected binding post of output end；First filter circuit plate includes common mode filtering inductance L1, common-mode filter
L2, common-mode filter L3, filter capacitor C1 and filter capacitor C2, second filter circuit plate include common mode filtering inductance L1 ',
Common-mode filter L2 ', common-mode filter L3 ', filter capacitor C1 ' and filter capacitor C2 '；Wherein, in the first filter circuit plate
Common mode filtering inductance L1, common-mode filter L2, common-mode filter L3 sequential series, filter capacitor C1 and filter capacitor C2 is mutually simultaneously
It is coupled to common mode filtering inductance L1 and common-mode filter L2 connection end；Common mode filtering inductance L1 ' in second filter circuit plate, altogether
Mode filter L2 ', common-mode filter L3 ' sequential series, common mode filtering inductance L1 ', common mode filtering in the second filter circuit plate
Device L2 ' and common-mode filter L3 ' sequential series, filter capacitor C1 ' and filter capacitor C2 ' are parallel with one another in common mode filtering inductance
L1 ' and common-mode filter L2 ' connection end；The common mode filtering inductance L1 and common mode filter inductance L1 ' is single magnet ring common mode
Filter inductance, line footpath used in its corresponding coiling common mode filtering inductance are more than common-mode filter L2, common-mode filter L3, common mode
Line footpath used in coiling inductance in wave filter L2 ' and common-mode filter L3 '；Common-mode filter L2, common-mode filter L3, common mode
Wave filter L2 ' and common-mode filter L3 ' is integrated form common-mode filter；In the first filter circuit plate, common-mode filter L2
With common-mode filter L3 in the same side, filter capacitor C1 and filter capacitor C2 is in the same side, filter capacitor C1, filter capacitor C2 institutes
While extended line and common-mode filter L2, common-mode filter L3 where while extended line intersect vertically and form semi-surrounding knot
Structure；Common mode filtering inductance L1 is in and formed by common-mode filter L2, common-mode filter L3, filter capacitor C1 with filter capacitor C2
The open end of semi-surrounding structure, and close to common-mode filter L2, common-mode filter L3, filter capacitor C1 and filter capacitor C2；
In second filter circuit plate, common-mode filter L2 ' and common-mode filter L3 ' is in the same side, filter capacitor C1 ' and filter capacitor
The extended line and common-mode filter L2 ', common-mode filter on C2 ' sides where the same side, filter capacitor C1 ', filter capacitor C2 '
The extended line on side where L3 ' intersects vertically and forms semi-surrounding structure；Common mode filtering inductance L1 ' be in by common-mode filter L2 ',
Common-mode filter L3 ', filter capacitor C1 ' and filter capacitor C2 ' form the open end of semi-surrounding structure, and close to common mode filtering
Device L2 ', common-mode filter L3 ', filter capacitor C1 ' and filter capacitor C2 '.
A kind of 2. power-supply filter as claimed in claim 1, it is characterised in that：The first independent chamber is additionally provided with shield shell
Room and second chamber, it is respectively used to installation and fixes the first filter circuit plate and the second filter circuit plate.
A kind of 3. power-supply filter as claimed in claim 1 or 2, it is characterised in that：Insulation is also filled with shield shell to lead
Hot glue.
A kind of 4. power-supply filter as claimed in claim 1, it is characterised in that：Shield shell is additionally provided with installation journal stirrup, installation
Journal stirrup is provided with installation through-hole；Journal stirrup is installed in the same side of binding post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721085594.6U CN207099040U (en) | 2017-08-28 | 2017-08-28 | A kind of power-supply filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721085594.6U CN207099040U (en) | 2017-08-28 | 2017-08-28 | A kind of power-supply filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207099040U true CN207099040U (en) | 2018-03-13 |
Family
ID=61540231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721085594.6U Active CN207099040U (en) | 2017-08-28 | 2017-08-28 | A kind of power-supply filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207099040U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024114016A1 (en) * | 2022-11-29 | 2024-06-06 | 深圳威迈斯新能源股份有限公司 | Emc filter shielding structure and emc filter |
-
2017
- 2017-08-28 CN CN201721085594.6U patent/CN207099040U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024114016A1 (en) * | 2022-11-29 | 2024-06-06 | 深圳威迈斯新能源股份有限公司 | Emc filter shielding structure and emc filter |
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