CN201355570Y - EMI integrated inductor - Google Patents
EMI integrated inductor Download PDFInfo
- Publication number
- CN201355570Y CN201355570Y CNU2009200504120U CN200920050412U CN201355570Y CN 201355570 Y CN201355570 Y CN 201355570Y CN U2009200504120 U CNU2009200504120 U CN U2009200504120U CN 200920050412 U CN200920050412 U CN 200920050412U CN 201355570 Y CN201355570 Y CN 201355570Y
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- Prior art keywords
- magnetic core
- integrated inductor
- emi
- girder
- flatwise
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- 239000004568 cement Substances 0.000 claims description 13
- 238000003466 welding Methods 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000002131 composite material Substances 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
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- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model relates to an EMI integrated inductor, which comprises a pair of pion-shaped magnetic cores which are arranged in parallel, a pair of auxiliary magnetic cores which are arranged in parallel and two flat coils, wherein each pion-shaped magnetic core is composed of a main beam and two central posts which are arranged on the main beam, wherein each main beam and the auxiliary magnetic cores are surrounded together into a hollow cavity for containing the two flat coils, two central posts of each pion-shaped magnetic core are respectively and correspondingly inserted into coil holes of the two flat coils, wherein the main beam of the pion-shaped magnetic core can be matched with auxiliary magnetic cores which are made of various materials for forming a composite magnetic circuit, and thereby, the differential mode characteristics can be flexibly customized on the basis of satisfying common mode impedance. The EMI integrated inductor has simple structure, convenient manufacture and strong practicability.
Description
Technical field
The utility model relates to a kind of EMI integrated inductor, mainly is the inhibition at dc transformating power input electromagnetic interference, can be widely used in switch DC supply and little dynamo-electric inversion field.
Background technology
Along with popularizing and development of Switching Power Supply electronic product, various electronic product can be subjected to Electromagnetic Interference and cause phenomenons such as parafunction, error of transmission or Control Failure, people are referred to as the electromagnetic interference (EMI) phenomenon, the electromagnetic interference that so how to reduce electronic product has become the problem that electron trade receives much concern, simultaneously along with electronic equipment to compact, integrated, intelligent and multifunction direction develops, and also just people is had higher requirement to the countermeasure of electromagnetic interference.At present, high frequencyization and integrated be the both direction of power supply magnetic elements miniaturization, the integrated approach of the inductance that disturbs for anti-EMI common mode and difference mode signal is more and more, but all be to be confined on existing cylinder U-shaped magnetic core and the rich system of the enamelled wire basis, because it is more stiff that this U-shaped magnetic core uses, rely on agrafe as needs and assist and fix, and the U-shaped magnetic core also is difficult to satisfy the requirement of miniaturization and chip type.
The utility model content
The utility model is at the existing disappearance of prior art, main purpose be to provide a kind of simple in structure, use EMI integrated inductor flexibly.
For realizing above-mentioned purpose, the utility model is taked following technical scheme:
A kind of EMI integrated inductor, comprise the π shape magnetic core of pair of parallel setting, auxiliary magnetic core and two flatwise coils that pair of parallel is provided with, each π shape magnetic core system is made of girder and two newels be located on the girder, wherein each girder and auxiliary magnetic core one common peripheral constitute the cavity of ccontaining two flatwise coils, in the circle hole of corresponding respectively insertion two flatwise coils of two newels of each π shape magnetic core.
The newel of the girder two ends relative proximity of described π shape magnetic core has the elongated area that is used for auxiliary magnetic core.
Described auxiliary magnetic core convexes with a fixture block, and this fixture block laterally snaps in the flatwise coil.
Further, also comprise a plastic cement underframe, it is located at π shape magnetic core bottom side; Be separated with between this plastic cement underframe between two disposal areas, in described two flatwise coil part correspondences fall between this disposal area, and the welding foot of each flatwise coil is attached on the plastic cement underframe.
This plastic cement underframe comprises that two parallel bottom bars and are horizontally set at the space bar between two bottom bars, the corresponding respectively girder bottom side of being located at π shape magnetic core of this two bottom bar.
Be embedded with a safety dividing plate between two flatwise coils, this safety dividing plate comprises that a cover plate and is located at the plate of setting on the cover plate.
The utility model advantage is can be used the formation composite magnetic circuit with the auxiliary magnetic core of multiple material by the girder of π shape magnetic core, is so satisfying on the basis of common code impedance, can flexible customization differential mode characteristic.The utility model is simple in structure, easy to process, practical.
Description of drawings
Fig. 1 is the utility model perspective exploded view;
Fig. 2 is the three-dimensional combination of a utility model schematic diagram;
Fig. 3 is the three-dimensional combination in another visual angle of a Fig. 2 schematic diagram.
The drawing reference numeral explanation:
1, π shape magnetic core 11, girder
111, elongated area 12, newel
2, auxiliary magnetic core 21, fixture block
3, flatwise coil 31, circle hole
32, welding foot 4, safety dividing plate
41, cover plate 42, set plate
5, between plastic cement underframe 51, disposal area
52, bottom bar 53, space bar
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
See also Fig. 1 to shown in Figure 3, a kind of EMI integrated inductor comprises the π shape magnetic core 1 of pair of parallel setting, auxiliary magnetic core 2 and two flatwise coils 3 that pair of parallel is provided with, wherein:
Each π shape magnetic core 1 is to be made of girder 11 and two newels 12 be located on the girder 11, wherein each girder 11 and auxiliary magnetic core 2 one common peripheral constitute the cavity of ccontaining two flatwise coils 3, make girder 11 and auxiliary magnetic core 2 form composite magnetic circuit, so can constitute the integrated of multifunction magnetic element; In the circle hole 31 of corresponding respectively insertion two flatwise coils 3 of two newels 12 of each π shape magnetic core 1.The newel 12 of the girder 11 two ends relative proximities of described π shape magnetic core 1 has an elongated area 111, is used the formation composite magnetic circuit for auxiliary magnetic core 2.
Described auxiliary magnetic core 2 convexes with a fixture block 21, and this fixture block 21 laterally snaps in the flatwise coil 3.Between two flatwise coils 3, be embedded with a safety dividing plate 4, this safety dividing plate 4 comprises that a cover plate 41 and is located at and sets plate 42 on the cover plate 41, this cover plate 41 is positioned at two flatwise coils, 3 tops, this is set plate 42 and is flush-mounted between two flatwise coils 3, so can guarantee enough creepage distances effectively, the sucker effect in the time of can doing the SMT assembling in addition.
Further, also comprise a plastic cement underframe 5, it is located at π shape magnetic core 1 bottom side; 5 on this plastic cement underframe is separated with between two disposal areas 51, and described two flatwise coils, 3 part correspondences fall between this disposal area in 51, and the welding foot 32 of each flatwise coil 3 is attached on the plastic cement underframe 5, to be fit to surface adhesion (SMT) device.This plastic cement underframe 5 comprises that two parallel bottom bars 52 and are horizontally set at the space bar 53 between two bottom bars 52, corresponding respectively girder 11 bottom sides of being located at π shape magnetic core 1 of this two bottom bar 52.
In the utility model by assembling two flatwise coils 3 (number of turns can be appointed accent) on two newels 12 of π shape magnetic core 1 as two inductance of common mode inductance, so utilize leakage inductance that two flatwise coils of π shape magnetic core 1 structure form obviously greater than traditional U-shaped magnetic core, use so can be used as differential mode inductance by this leakage inductance.The client can be as required the differential mode inductance amount and withstanding current capability at the auxiliary magnetic core 2 of π shape magnetic core 1 collocation different materials, thereby form the electric leakage sensibility reciprocals of different sizes.
The utility model design focal point is can be used the formation composite magnetic circuit with the auxiliary magnetic core of multiple material by the girder of π shape magnetic core, is so satisfying on the basis of common code impedance, can flexible customization differential mode characteristic.
The above, it only is the preferred embodiment of the utility model structure, be not that technical scope of the present utility model is imposed any restrictions, so every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any trickle modification, equivalent variations and modification that above embodiment did.
Claims (6)
1, a kind of EMI integrated inductor, it is characterized in that: comprise the π shape magnetic core of pair of parallel setting, auxiliary magnetic core and two flatwise coils that pair of parallel is provided with, each π shape magnetic core system is made of girder and two newels be located on the girder, wherein each girder and auxiliary magnetic core one common peripheral constitute the cavity of ccontaining two flatwise coils, in the circle hole of corresponding respectively insertion two flatwise coils of two newels of each π shape magnetic core.
2, according to the described EMI integrated inductor of claim 1, it is characterized in that: the newel of the girder two ends relative proximity of described π shape magnetic core has the elongated area that is used for auxiliary magnetic core.
3, according to the described EMI integrated inductor of claim 1, it is characterized in that: described auxiliary magnetic core convexes with a fixture block, and this fixture block laterally snaps in the flatwise coil.
4, according to the described EMI integrated inductor of claim 1, it is characterized in that: also comprise a plastic cement underframe, it is located at π shape magnetic core bottom side; Be separated with between this plastic cement underframe between two disposal areas, in described two flatwise coil part correspondences fall between this disposal area, and the welding foot of each flatwise coil is attached on the plastic cement underframe.
5, according to the described EMI integrated inductor of claim 4, it is characterized in that: this plastic cement underframe comprises that two parallel bottom bars and are horizontally set at the space bar between two bottom bars, the corresponding respectively girder bottom side of being located at π shape magnetic core of this two bottom bar.
6, according to the described EMI integrated inductor of claim 1, it is characterized in that: be embedded with a safety dividing plate between two flatwise coils, this safety dividing plate comprises that a cover plate and is located at the plate of setting on the cover plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200504120U CN201355570Y (en) | 2009-01-19 | 2009-01-19 | EMI integrated inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200504120U CN201355570Y (en) | 2009-01-19 | 2009-01-19 | EMI integrated inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201355570Y true CN201355570Y (en) | 2009-12-02 |
Family
ID=41411913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200504120U Expired - Fee Related CN201355570Y (en) | 2009-01-19 | 2009-01-19 | EMI integrated inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201355570Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360725A (en) * | 2011-07-20 | 2012-02-22 | 唐山尚新融大电子产品有限公司 | Magnetic differential mode and common mode integrated inductor |
| WO2015085838A1 (en) * | 2013-12-12 | 2015-06-18 | 伊顿公司 | Integrated inductor |
| CN105719784A (en) * | 2014-07-23 | 2016-06-29 | 杨玉岗 | Integrated magnetic coupled inductor in the shape of Chinese character mu |
| CN111105920A (en) * | 2020-01-07 | 2020-05-05 | 珠海黎明云路新能源科技有限公司 | A common differential mode integrated magnetic circuit integrated inductor |
| CN119480365A (en) * | 2024-12-03 | 2025-02-18 | 海宁瑞思科技有限公司 | A novel quad common differential mode integrated inductor |
-
2009
- 2009-01-19 CN CNU2009200504120U patent/CN201355570Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360725A (en) * | 2011-07-20 | 2012-02-22 | 唐山尚新融大电子产品有限公司 | Magnetic differential mode and common mode integrated inductor |
| WO2015085838A1 (en) * | 2013-12-12 | 2015-06-18 | 伊顿公司 | Integrated inductor |
| US10121582B2 (en) | 2013-12-12 | 2018-11-06 | Eaton Intelligent Power Limited | Integrated inductor |
| CN105719784A (en) * | 2014-07-23 | 2016-06-29 | 杨玉岗 | Integrated magnetic coupled inductor in the shape of Chinese character mu |
| CN105719784B (en) * | 2014-07-23 | 2019-01-15 | 杨玉岗 | A kind of integrated coupling inductor of mu character shape magnetic |
| CN111105920A (en) * | 2020-01-07 | 2020-05-05 | 珠海黎明云路新能源科技有限公司 | A common differential mode integrated magnetic circuit integrated inductor |
| CN119480365A (en) * | 2024-12-03 | 2025-02-18 | 海宁瑞思科技有限公司 | A novel quad common differential mode integrated inductor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091202 Termination date: 20140119 |