CN202634260U - EMI power supply filter - Google Patents
EMI power supply filter Download PDFInfo
- Publication number
- CN202634260U CN202634260U CN 201220104267 CN201220104267U CN202634260U CN 202634260 U CN202634260 U CN 202634260U CN 201220104267 CN201220104267 CN 201220104267 CN 201220104267 U CN201220104267 U CN 201220104267U CN 202634260 U CN202634260 U CN 202634260U
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- magnetic core
- wire
- supply filter
- core hole
- output terminal
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Abstract
An EMI power supply filter includes an input terminal lead wire, an output terminal lead wire and a magnetic core. A grounding wire can also be included. The input terminal lead wire and the output terminal lead wire respectively traverse mutually different magnetic core holes, the magnetic core holes are positioned in magnetic cores, all magnetic core holes are communicated through air gaps, a magnetic coupling effect is generated, and coupling inductances are utilized as common modes to inhibit a filtering inductance. According to the utility model, the air gaps can be respectively adjusted, the self-inductances at a corresponding input terminal and an output terminal can be obtained through adjustment, the self-inductances at the input terminal and the output terminal can be different and can be the same, and the self-inductances at the input terminal and the output terminal can be applied as differential modes to inhibit the filtering inductance.
Description
Technical field
The utility model relates to a kind of filter, especially is suitable for anti-electromagnetism class filter.
Background technology
For suppressing various interference; Usually the noise filter inductance of power source products is minimum is made up of three parts: the input differential mode suppresses filter inductance, the output differential mode suppresses filter inductance and common mode inhibition filter inductance, and this three part all is three independently elements usually.Because the shared space of three independent components is bigger; Thereby the improvement that can cause product to carry out volume-diminished receives certain restriction, and makes the complex manufacturing of product, and manufacturing cost is high; Production unit cost can't reduce, and the frock clamp expense of the mould of its use and production usefulness also can't reduce.
The utility model content
High in order to overcome existing power-supply filter production unit cost, small product size is big, the deficiency that product processes is complicated, and the utility model provides a kind of EMI power-supply filter, adopts integrated technique, and above-mentioned three parts integrations are arrived together.
The utility model is realized through following technical scheme:
Input lead-in wire and output lead-in wire pass the magnetic core hole respectively, and the magnetic core hole is positioned at magnetic core, and each magnetic core hole is communicated with through air gap.Reach the coupling of generation magnetic, utilize coupling inductance as the common mode inhibition filter inductance.
According to different application requirements, through regulating size of gaps, can obtain corresponding input and output self-induction, input can be different with the output self-induction, also can be identical, utilize the input and output side self-induction to suppress filter inductance as differential mode.
Basis is novel only just to integrate three traditional separated components with a magnetic core, and production technology and manufacturing cost have been simplified in all decrease to some degree and minimizings on goods cost, product volume, has also practiced thrift the frock clamp investment of product simultaneously.
Description of drawings
Fig. 1 is a kind of schematic perspective view of the utility model;
Fig. 2 is the utility model plan structure sketch map;
Fig. 3 is the utility model cross-sectional view.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described:
A kind of EMI power-supply filter comprises magnetic core 01, magnetic core hole 02, air gap 03, input lead-in wire 04, output lead-in wire 06.The magnetic core hole is equidistantly arranged or unequal-interval is positioned at magnetic core, and each magnetic core hole is communicated with through air gap.Said input lead-in wire 04, output lead-in wire 06 passes the magnetic core hole of inequality respectively, reaches to produce the magnetic coupling, utilizes coupling inductance as the common mode inhibition filter inductance.Adjust said air gap 03, can obtain corresponding input and output self-induction, input can be different with the output self-induction, also can be identical, and utilize the input and output side self-induction to suppress filter inductance as differential mode.
The utility model can also comprise ground wire 05, and said ground wire 05 passes a magnetic core hole 02 that is positioned at non-edge, and said input lead-in wire 04 and output lead-in wire 06 pass the magnetic core hole 02 of said ground wire 05 both sides respectively.
Describe this novel specific embodiment above in detail.But should be appreciated that this novel execution mode is not limited in the foregoing description, the description of the foregoing description only is used to help to understand this novel spirit.Under this novel spirit that discloses,, all fall in this novel scope these novel various variant of doing.
Claims (5)
1. an EMI power-supply filter comprises input lead-in wire, output lead-in wire and magnetic core, and it is characterized in that: the magnetic core hole is positioned at magnetic core, and input lead-in wire and output lead-in wire pass the magnetic core hole of inequality respectively, and each magnetic core hole is communicated with through air gap.
2. a kind of EMI power-supply filter according to claim 1 is characterized in that: the size in said magnetic core hole is identical or inequality with the distance between the magnetic core hole.
3. a kind of EMI power-supply filter according to claim 1 is characterized in that: also comprise ground wire, and the magnetic core hole in the middle of said ground wire passes, input lead-in wire and output lead-in wire pass the magnetic core hole that is positioned at the ground wire both sides respectively.
4. a kind of EMI power-supply filter according to claim 1, it is characterized in that: the size of each said air gap can be regulated respectively.
5. a kind of EMI power-supply filter according to claim 1 is characterized in that: said magnetic core hole equidistantly is arranged in the magnetic core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220104267 CN202634260U (en) | 2012-03-20 | 2012-03-20 | EMI power supply filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220104267 CN202634260U (en) | 2012-03-20 | 2012-03-20 | EMI power supply filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202634260U true CN202634260U (en) | 2012-12-26 |
Family
ID=47387402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220104267 Expired - Fee Related CN202634260U (en) | 2012-03-20 | 2012-03-20 | EMI power supply filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202634260U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108492965A (en) * | 2018-03-14 | 2018-09-04 | 北京航天发射技术研究所 | A kind of New Type of Differential common mode filtering induction structure |
| CN111292930A (en) * | 2018-12-10 | 2020-06-16 | 西门子电动汽车动力总成系统(上海)有限公司 | Electronic equipment and filter inductor thereof |
| CN111986905A (en) * | 2020-08-14 | 2020-11-24 | 深圳市铂科新材料股份有限公司 | Manufacturing method of die pressing combined inductor and die pressing combined inductor |
-
2012
- 2012-03-20 CN CN 201220104267 patent/CN202634260U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108492965A (en) * | 2018-03-14 | 2018-09-04 | 北京航天发射技术研究所 | A kind of New Type of Differential common mode filtering induction structure |
| CN111292930A (en) * | 2018-12-10 | 2020-06-16 | 西门子电动汽车动力总成系统(上海)有限公司 | Electronic equipment and filter inductor thereof |
| CN111292930B (en) * | 2018-12-10 | 2021-12-31 | 西门子电动汽车动力总成系统(上海)有限公司 | Electronic equipment and filter inductor thereof |
| CN111986905A (en) * | 2020-08-14 | 2020-11-24 | 深圳市铂科新材料股份有限公司 | Manufacturing method of die pressing combined inductor and die pressing combined inductor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20180320 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |