CN205004153U - Magnetic core and filter - Google Patents
Magnetic core and filter Download PDFInfo
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- CN205004153U CN205004153U CN201520780706.4U CN201520780706U CN205004153U CN 205004153 U CN205004153 U CN 205004153U CN 201520780706 U CN201520780706 U CN 201520780706U CN 205004153 U CN205004153 U CN 205004153U
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- magnetic core
- type magnetic
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- screening cover
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Abstract
The utility model relates to a magnetic core and filter, including a E -shaped magnetic cores and the 2nd E -shaped magnetic cores who is arranged in increasing the intensity of overflow tank of inductance coils magnetic circuit, the magnetic core still includes the screening cover, a E -shaped magnetic cores, the 2nd E -shaped magnetic cores's magnetic core bottom plate three posts on for the magnetic core bottom plate outwards extend the formation platform, a E -shaped magnetic cores, the 2nd E -shaped magnetic cores's three posts set up relatively, and wherein two at least posts contact the connection each other, the screening cover with the platform butt of a E -shaped magnetic cores, the 2nd E -shaped magnetic cores's magnetic core bottom plate forms cavity structures. Owing to be equipped with the screening cover, compact structure, the closure is good, when having the current conveyance on magnetic core coil, output magnetic flux will form the electromagnetic field on the space, when being equipped with the screening cover, the screening cover has just blockked the outside space radiation of most electromagnetic fields, and then has realized electromagnetic shield, the filtering electromagnetic interference.
Description
Technical field
The utility model relates to filter field, particularly relates to magnetic core and filter.
Background technology
Electronic apparatus and instrumentation, have the requirement of electromagnetism interference aspect, and electromagnetic interference (ElectromagneticInterference, EMI) is interference cable signal and reduces the electronic noise of signal integrity.Electronic apparatus, especially the electronic apparatus of High-frequency Interference can be produced, generally can design the filter of a filtering electromagnetic interference, the electromagnetic interference filtering produced when electronic apparatus or instrumentation work can be removed, in order to avoid seal in omnibus circuit to produce interference to other electrical equipment by it; Also background electromagnetic interference in omnibus circuit can be avoided to seal in electrical equipment itself, to enable oneself normally to work.
EE type filtering magnetic core can be comprised in traditional filter, as shown in Figure 1, comprise two E type filtering magnetic cores, and two E type filtering magnetic cores are oppositely arranged, but the magnetic structure of EE type filtering magnetic core 12 is open types, magnetic phenomenon is fallen apart relatively seriously in space, and Magnetic Shielding Effectiveness is bad, have impact on the effect of its filtering electromagnetic interference.
Utility model content
Based on this, be necessary to fall apart magnetic relatively seriously for space, the problem that Magnetic Shielding Effectiveness is bad, provides a kind of magnetic core.
A kind of magnetic core, comprise the first E-type magnetic core for increasing the magnetic flux density in inductance coil magnetic circuit and the second E-type magnetic core, described magnetic core also comprises screening cover, and the magnetic core base plate of described first E-type magnetic core, the second E-type magnetic core to stretch out formation platform relative to three posts on magnetic core base plate; Three posts of described first E-type magnetic core, the second E-type magnetic core are oppositely arranged, and wherein at least two posts contact with each other connection; Described screening cover abuts with the platform of the magnetic core base plate of described first E-type magnetic core, the second E-type magnetic core, forms cavity body structure.
Wherein in an embodiment, the magnetic core base plate of described first E-type magnetic core, the second E-type magnetic core abuts with described screening cover two ends respectively away from the side of three posts, forms cavity body structure.
Wherein in an embodiment, described screening cover be clipped in described first E-type magnetic core, the second E-type magnetic core magnetic core base plate platform between, formed cavity body structure.
Wherein in an embodiment, described first E-type magnetic core, the second E-type magnetic cored structure are identical; Three posts of described first E-type magnetic core are respectively the first side column, center pillar and the second side column that are shaped in and the magnetic core base plate of described first E-type magnetic core distributes;
Described first side column, center pillar, the second side column are all vertical with described magnetic core base plate, and the first side edge that described first side column, center pillar, the second side column are all positioned at described magnetic core base plate makes the second edge of described magnetic core base plate form platform.
Wherein in an embodiment, the first side column of described first E-type magnetic core, center pillar, the second side column directly contact connect as one respectively at the first side column of the second E-type magnetic core, center pillar, the second side columns.
Wherein in an embodiment, first side column of described first E-type magnetic core, the second side column directly contact connect as one respectively at the first side column of the second E-type magnetic core, the second side columns, and at least one center pillar of center pillar of described first E-type magnetic core, the second E-type magnetic core is provided with air gap.
Wherein in an embodiment, described first E-type magnetic core, the second E-type magnetic core and screening cover are the one in manganese-zinc ferrite core, ferrite core of nickel-zinc, metal-powder-core.
Wherein in an embodiment, described first E-type magnetic core, the second E-type magnetic core and the connected mode of screening cover are bonding or in welding one.
In addition, also provide a kind of filter, comprise circuit board, line bag, described filter also comprises magnetic core, described line is wrapped on the center pillar of the first E-type magnetic core of described magnetic core, the second E-type magnetic core, the three posts corresponding contact respectively of described first E-type magnetic core, the second E-type magnetic core; Described magnetic core is installed on circuit boards, and the one side that described magnetic core screening cover is relative is connected with described circuit board contacts.
A kind of filter, comprise circuit board, First Line bag and the second line bag, described filter also comprises magnetic core, and described First Line is wrapped on the first side column of the first E-type magnetic core of described magnetic core, the second E-type magnetic core; Described second line is wrapped on the second side column of the first E-type magnetic core of described magnetic core, the second E-type magnetic core; Described first E-type magnetic core, the second E-type magnetic core are oppositely arranged, and center pillar leaves air gap; Described magnetic core is installed on circuit boards, and the one side that described magnetic core screening cover is relative is connected with described circuit board contacts.
Above-mentioned magnetic core, owing to being provided with screening cover, compact conformation, closure is good, when magnetic core coil there being electric current pass through, output magnetic flux, spatially will form electromagnetic field, when being provided with screening cover, screening cover just blocks the outside space radiation of electromagnetic field of the overwhelming majority, and then achieve electromagnetic shielding, filtering electromagnetic interference.
Accompanying drawing explanation
Fig. 1 is traditional E E core structure figure;
Fig. 2 is the utility model first E-type magnetic cored structure figure;
Fig. 3 is the utility model one embodiment core structure figure (a) stereogram (b) explosive view;
Fig. 4 is the utility model one embodiment core structure figure;
Fig. 5 is the utility model one embodiment core structure figure.
Embodiment
For the ease of understanding the utility model, below with reference to relevant drawings, the utility model is described more fully.Preferred embodiment of the present utility model is given in accompanying drawing.But the utility model can realize in many different forms, is not limited to embodiment described herein.On the contrary, provide the object of these embodiments be make the understanding of disclosure of the present utility model more comprehensively thorough.
Unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present utility model understand usually.The object of the term used in specification of the present utility model herein just in order to describe specific embodiment, is not intended to limit the utility model.Term as used herein "and/or" comprises arbitrary and all combinations of one or more relevant Listed Items.
As shown in Figure 2 be the first E-type magnetic cored structure figure in the EE magnetic core of an embodiment, first E-type magnetic core 10 comprises magnetic core base plate 100, first side column 110, second side column 120 and center pillar 130, first side column 110, second side column 120 and center pillar 130 are shaped on the magnetic core base plate 100 of the first E-type magnetic core 10, and perpendicular to magnetic core base plate 100.The magnetic core base plate 100 of the first E-type magnetic core 10 to stretch out formation platform relative to three posts be positioned at above magnetic core base plate 100 (110,120,130); The first side edge 101 that first side column 110, center pillar 130, second side column 120 are all positioned at magnetic core base plate 100 makes the second side edge 102 of magnetic core base plate 100 form platform.
Is EE type core structure stereogram in an embodiment as shown in Fig. 3 (a), is the EE type core structure explosive view of Fig. 3 (a) as shown in Fig. 3 (b), and in figure, EE type magnetic core comprises the first E-type magnetic core 10, second E-type magnetic core 20 and screening cover 30; The structure of the first E-type magnetic core 10 and the second E-type magnetic core 20, measure-alike.Composition graphs 3 (a), (b), the first side column 110, second side column 120 of the first E-type magnetic core 10 and center pillar 130 connect with the first side column 210, second side column 220 of the second E-type magnetic core 20 and corresponding contact of center pillar 230 respectively.First E-type magnetic core 10 has an outward extending platform, is namely positioned at the second side 102 of magnetic core base plate 100.Second E-type magnetic core 20 has an outward extending platform, is namely positioned at the second side 202 of magnetic core base plate 200.The two ends of screening cover 30 are connected with the platform of the first E-type magnetic core 10, second E-type magnetic core 20 respectively, namely the first E-type magnetic core 10 magnetic core base plate 100 abuts with screening cover 30 two ends away from the side of three posts respectively away from the side of three posts, the magnetic core base plate 200 of the second E-type magnetic core 20, forms cavity body structure.The size of screening cover 30 is identical with the size that the first E-type magnetic core 10, second E-type magnetic core 20 is oppositely arranged the first side column 110, second side column 120, center pillar 130 place plane afterwards in the present embodiment.
As shown in Figure 4 be an embodiment core structure figure, wherein between screening cover 30 platform that is clipped in the first E-type magnetic core 10 and the second E-type magnetic core 20 platform, also form a cavity body structure.
Due to screening cover 30, the magnetic circuit making whole EE type magnetic core is enclosed cavity body structure, its compact conformation, its closure is much better than traditional EE type magnetic core (as shown in Figure 1), eliminate space to fall apart magnetic phenomenon, Magnetic Shielding Effectiveness is good, filtering electromagnetic interference.
First E-type magnetic core 10, second E-type magnetic core 20 and screening cover 30 can be same core material, also can be different, and general magnetic core comprises manganese-zinc ferrite core, ferrite core of nickel-zinc, MgZn ferrite magnetic cores, metal magnetic powder core.
According to the difference of the first E-type magnetic core 10, second E-type magnetic core 20, screening cover 30 material, its mode connected is also different.
In the present embodiment, first E-type magnetic core 10, second E-type magnetic core 20 is ferrite core of nickel-zinc, screening cover 30 is metal magnetic powder core, and the first E-type magnetic core 10, second E-type magnetic core 20 and screening cover 30 all parts are used but be not limited to connect as one with bonding form with anaerobic adhesive, high-temp epoxy glue etc.
In other embodiments, the first E-type magnetic core 10, second E-type magnetic core 20 and screening cover 30 can also be MnZn magnetic core, FERRITE CORE, metal magnetic one in the heart.
As shown in Figure 5 be EE type core structure figure in an embodiment, EE type magnetic core comprises the first E-type magnetic core 10 ', second E-type magnetic core 20 ' and screening cover 30 '; First E-type magnetic core 10 ', the first side column 110 ', the second side column 120 ' connect with the first side column 210 ' of the second E-type magnetic core 20 ', the corresponding contact of the second side column 220 ' respectively, the center pillar 130 ' of the first E-type magnetic core 10 ' and the center pillar 230 ' opposite position of the second E-type magnetic core 20 ' are provided with air gap 132.In the present embodiment, air gap 132 is formed by the center pillar 130 ' of the first E-type magnetic core 10 ' of polishing.
In other embodiments, also can by polish the center pillar 130 ' of the first E-type magnetic core 10 ' and the center pillar 230 ' of the second E-type magnetic core 20 ' and formed simultaneously.The length of its air gap 132 is determined by the size of current passed through and required differential mode inductance amount size, and relevant with concrete environment for use, air gap is generally about 0.05-2mm.
A kind of filter, comprise circuit board, line bag, magnetic core, and line is wrapped in magnetic core, line handbag draws together copper cash and plastic skeleton, copper cash is around on plastic skeleton, and skeleton is enclosed within the center pillar of the first E-type magnetic core, the second E-type magnetic core, the three posts corresponding contact respectively of the first E-type magnetic core, the second E-type magnetic core; Magnetic core is installed on circuit boards, and the corresponding one side of magnetic core screening cover is connected with circuit board contacts.This filter can as common-mode filter.
A kind of filter, comprise circuit board, First Line bag, the second line bag and magnetic core, First Line is wrapped on the first side column of magnetic core first E-type magnetic core, the second E-type magnetic core; Second line is wrapped on the second side column of the first E-type magnetic core of magnetic core, the second E-type magnetic core; First E-type magnetic core, the second E-type magnetic core are oppositely arranged, and center pillar leaves air gap, and the length of air gap is determined by the size of current passed through and required differential mode inductance amount size, and relevant with concrete environment for use, air gap is generally about 0.05-2mm.Magnetic core is installed on circuit boards, and the corresponding one side of magnetic core screening cover is connected with circuit board contacts.This filter can as common, the integrated filter inductance of differential mode.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this specification is recorded.
The above embodiment only have expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (10)
1. a magnetic core, comprise the first E-type magnetic core for increasing the magnetic flux density in inductance coil magnetic circuit and the second E-type magnetic core, it is characterized in that, described magnetic core also comprises screening cover, and the magnetic core base plate of described first E-type magnetic core, the second E-type magnetic core to stretch out formation platform relative to three posts on magnetic core base plate; Three posts of described first E-type magnetic core, the second E-type magnetic core are oppositely arranged, and wherein at least two posts contact with each other connection; Described screening cover abuts with the platform of the magnetic core base plate of described first E-type magnetic core, the second E-type magnetic core, forms cavity body structure.
2. magnetic core according to claim 1, is characterized in that, the magnetic core base plate of described first E-type magnetic core, the second E-type magnetic core abuts with described screening cover two ends respectively away from the side of three posts, forms cavity body structure.
3. magnetic core according to claim 1, is characterized in that, described screening cover be clipped in described first E-type magnetic core, the second E-type magnetic core magnetic core base plate platform between, formed cavity body structure.
4. magnetic core according to claim 1, is characterized in that, described first E-type magnetic core, the second E-type magnetic cored structure are identical; Three posts of described first E-type magnetic core are respectively the first side column, center pillar and the second side column that are shaped in and the magnetic core base plate of described first E-type magnetic core distributes;
Described first side column, center pillar, the second side column are all vertical with described magnetic core base plate, and the first side edge that described first side column, center pillar, the second side column are all positioned at described magnetic core base plate makes the second edge of described magnetic core base plate form platform.
5. magnetic core according to claim 4, is characterized in that, the first side column of described first E-type magnetic core, center pillar, the second side column directly contact connect as one respectively at the first side column of the second E-type magnetic core, center pillar, the second side column.
6. magnetic core according to claim 4, it is characterized in that, first side column of described first E-type magnetic core, the second side column directly contact connect as one respectively at the first side column of the second E-type magnetic core, the second side columns, and at least one center pillar of center pillar of described first E-type magnetic core, the second E-type magnetic core is provided with air gap.
7. magnetic core according to claim 1, is characterized in that, described first E-type magnetic core, the second E-type magnetic core and screening cover are the one in manganese-zinc ferrite core, ferrite core of nickel-zinc, metal-powder-core.
8. magnetic core according to claim 1, is characterized in that, described first E-type magnetic core, the second E-type magnetic core and the connected mode of screening cover are bonding or in welding one.
9. a filter, comprise circuit board, line bag, it is characterized in that, described filter also comprises the magnetic core any one of claim 1 ~ 8, described line is wrapped on the center pillar of the first E-type magnetic core of described magnetic core, the second E-type magnetic core, the three posts corresponding contact respectively of described first E-type magnetic core, the second E-type magnetic core; Described magnetic core is installed on circuit boards, and the one side that described magnetic core screening cover is relative is connected with described circuit board contacts.
10. a filter, comprise circuit board, First Line bag and the second line bag, it is characterized in that, described filter also comprises the magnetic core any one of claim 1 ~ 8, and described First Line is wrapped on the first side column of the first E-type magnetic core of described magnetic core, the second E-type magnetic core; Described second line is wrapped on the second side column of the first E-type magnetic core of described magnetic core, the second E-type magnetic core; Described first E-type magnetic core, the second E-type magnetic core are oppositely arranged, and center pillar leaves air gap; Described magnetic core is installed on circuit boards, and the one side that described magnetic core screening cover is relative is connected with described circuit board contacts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520780706.4U CN205004153U (en) | 2015-10-08 | 2015-10-08 | Magnetic core and filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520780706.4U CN205004153U (en) | 2015-10-08 | 2015-10-08 | Magnetic core and filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205004153U true CN205004153U (en) | 2016-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520780706.4U Expired - Fee Related CN205004153U (en) | 2015-10-08 | 2015-10-08 | Magnetic core and filter |
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| CN (1) | CN205004153U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111261368A (en) * | 2020-03-19 | 2020-06-09 | 昆山同凯电子有限公司 | Novel winding common-mode inductor and production method thereof |
-
2015
- 2015-10-08 CN CN201520780706.4U patent/CN205004153U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111261368A (en) * | 2020-03-19 | 2020-06-09 | 昆山同凯电子有限公司 | Novel winding common-mode inductor and production method thereof |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160127 |