CN202307449U - Magnetic core for differential-mode choking coil - Google Patents
Magnetic core for differential-mode choking coil Download PDFInfo
- Publication number
- CN202307449U CN202307449U CN2011203514884U CN201120351488U CN202307449U CN 202307449 U CN202307449 U CN 202307449U CN 2011203514884 U CN2011203514884 U CN 2011203514884U CN 201120351488 U CN201120351488 U CN 201120351488U CN 202307449 U CN202307449 U CN 202307449U
- Authority
- CN
- China
- Prior art keywords
- magnetic core
- shaped magnetic
- shaped
- differential
- cores
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses a magnetic core for a differential-mode choking coil, which comprises two mutually butting U-shaped magnetic cores. Each U-shaped magnetic core is a composite magnetic core consisting of three magnetic cores, and the three magnetic cores include a U-shaped magnetic core (1), a U-shaped magnetic core (2') and a U-shaped magnetic core (3), wherein one surface of the U-shaped magnetic core (1) is provided with a U-shaped groove (2), the U-shaped magnetic core (2') is placed into the U-shaped groove (2), the U-shaped magnetic core (3) is covered on the upper side of the U-shaped groove (2), the U-shaped magnetic core (2') is enclosed by the U-shaped magnetic core (1) and the U-shaped magnetic core (3), the U-shaped magnetic core (1), the U-shaped magnetic core (2') and the U-shaped magnetic core (3) are adhered together by adhesives to form one composite magnetic core, and at least two of the U-shaped magnetic core (1), the U-shaped magnetic core (2') and the U-shaped magnetic core (3) are made of totally different materials. The direct-current superposition characteristic of the differential-mode choking coil is greatly improved by compositing the magnetic cores made of different materials, so that higher direct current can pass through differential-mode choking coil windings, and the differential-mode choking coil can meet the continuous development requirements of electronic components and devices for high frequency, miniaturization and high power.
Description
Technical field
The utility model relates to a kind of magnetic core, relates in particular to a kind of differential mode choke and uses magnetic core.
Background technology
At present, generally use the differential mode choke that has magnetic core in the high-frequency circuit, along with the develop rapidly of electronic technology; Require electronic devices and components constantly to develop,, require the operating frequency of differential mode choke more and more wideer in order to satisfy this growth requirement to high frequencyization, miniaturization and high power direction; The direct current that permission is passed through is increasing; In the differential mode choke flip-flop is arranged, tend to cause the decline significantly of differential mode choke winding inductance, thereby make the differential mode choke can't operate as normal.For preventing the generation of magnetic saturation phenomenon; Must improve the dc superposition characteristic of differential mode choke; Traditional method is in the magnetic circuit of magnetic core, to open one section air gap, although this method can be improved the dc superposition characteristic of differential mode choke to a certain extent, improved degree is very limited.For being operated in differential mode choke with big direct-current component, can't adopt this method, because; Air gap in the magnetic core magnetic circuit can not unconfinedly be opened very greatly, otherwise; Inductance is very low; Influence the result of use of differential mode choke, and leakage field is very big, to around other electronic devices and components can produce certain electromagnetic and disturb.
Another method that improves differential mode choke dc superposition characteristic is to adopt the higher soft magnetic material of saturation flux density, for example; The amorphous nano-crystalline metal soft magnetic material; Its saturation flux density is up to more than the 1.5T, although its magnetic permeability is higher, dc superposition characteristic is better; But, can not be applied to higher operating frequency because the metallic resistance rate is lower; Use the magnetic powder core of various metals and metal alloy powders compacting,,, be usually less than 200, can influence the result of use of differential mode choke greatly because the magnetic permeability of magnetic powder core is lower although the operating frequency of differential mode choke is improved greatly.Therefore, the magnetic core that uses single material to process can't obtain to satisfy the differential mode choke with big direct-current component, high frequencyization, miniaturization and high power developing direction.
Summary of the invention
The utility model technical problem to be solved is the deficiency that overcomes prior art, provides a kind of electronic circuit that can be applied to have big direct-current component, high frequencyization, miniaturization and high power developing direction with differential mode choke magnetic core.
The technical scheme that the utility model adopted is: a kind of differential mode choke of the utility model is used magnetic core; Comprise two mutual butted U shape magnetic cores; The compound magnetic core that each U-shaped magnetic core then is made up of 3 magnetic cores; These 3 magnetic cores are respectively: at the U-shaped magnetic core (1), U-shaped magnetic core (2 ') (this magnetic core is put into U-lag (2)), the U-shaped magnetic core (3) that simultaneously have U-lag (2), U-shaped magnetic core (3) is identical with U-shaped (1) shape, but magnetic core variable thickness phasing together.
U-shaped magnetic core (2 ') is put into the U-lag (2) of U-shaped magnetic core (1), and its thickness is not more than the degree of depth of U-lag (2), covers U-shaped magnetic core (3) above again.U-shaped magnetic core (1), (3) are enclosed in inside with U-shaped magnetic core (2 '), and bond together each other with bonding agent.
Have at least the material of 2 magnetic cores different fully in U-shaped magnetic core (1), (3), (2 '); These 3 magnetic cores both can be the sintering magnetic cores through oversintering, also can be the magnetic powder cores that is formed by the soft magnetism pressed by powder; U-shaped magnetic core (2 ') can also be that the U-shaped magnetic sheet that shape is identical by material is different bonds together with (3).Unlike material comprises: soft magnetic ferrites, metal or metal alloy (comprising amorphous nano-crystalline) soft magnetic material and organic soft magnetic material etc.
The beneficial effect of the utility model is: the magnetic core of being processed by unlike material is combined with each other, and has improved the dc superposition characteristic of differential mode choke greatly, makes in the differential mode choke winding to pass through bigger direct current.Through the inventive method, can improve the dc superposition characteristic of differential mode choke greatly, the differential mode choke can be allowed through bigger direct current.Make the differential mode choke satisfy the requirement that electronic devices and components constantly develop to high frequencyization, miniaturization and high power direction simultaneously.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Fig. 1 is the schematic perspective view that has the U-shaped magnetic core (1) of U-lag (2) in one side.
Fig. 2 is the schematic perspective view of U-shaped magnetic core (2 ').
Fig. 3 is the schematic perspective view of U-shaped magnetic core (3).
After Fig. 4 is U-shaped magnetic core (1), (2 '), the compound magnetic core of (3) formation, in generalized section perpendicular to length direction.
Embodiment
A kind of differential mode choke of the utility model is used magnetic core; Comprise two mutual butted U shape magnetic cores; The compound magnetic core that each U-shaped magnetic core then is made up of 3 magnetic cores, these 3 magnetic cores are respectively: the U-shaped magnetic core (1), U-shaped magnetic core (2 ') (this magnetic core is put into U-lag (2)), the U-shaped magnetic core (3) that have U-lag (2) in one side; U-shaped magnetic core (3) is identical with U-shaped magnetic core (1) shape, but magnetic core variable thickness phasing together.
U-shaped magnetic core (2 ') is put into the U-lag (2) of U-shaped magnetic core (1), and its thickness is not more than the degree of depth of U-lag (2), U-shaped magnetic core (3) on the upper cover.U-shaped magnetic core (1), (3) are enclosed in inside with U-shaped magnetic core (2 '), and bond together each other with bonding agent.
]Have at least the material of 2 magnetic cores different fully in U-shaped magnetic core (1), (3), (2 '); These 3 magnetic cores both can be the sintering magnetic cores through oversintering, also can be the magnetic powder cores that is formed by the soft magnetism pressed by powder; U-shaped magnetic core (2 ') can also be that the U-shaped magnetic sheet that shape is identical by material is different bonds together with (3).Unlike material comprises: soft magnetic ferrites, metal or metal alloy (comprising amorphous nano-crystalline) soft magnetic material and organic soft magnetic material etc.
The magnetic core of being processed by unlike material is combined with each other, and has improved the dc superposition characteristic of differential mode choke greatly, makes in the differential mode choke winding to pass through bigger direct current.Through the inventive method, can improve the dc superposition characteristic of differential mode choke greatly, the differential mode choke can be allowed through bigger direct current.Make the differential mode choke satisfy the requirement that electronic devices and components constantly develop to high frequencyization, miniaturization and high power direction simultaneously.
Claims (3)
1. a differential mode choke is used magnetic core; It is characterized in that: this magnetic core comprises two mutual butted U shape magnetic cores; The compound magnetic core that each U-shaped magnetic core then is made up of 3 magnetic cores; These 3 magnetic cores are respectively: at the U-shaped magnetic core (1), U-shaped magnetic core (2 '), the U-shaped magnetic core (3) that simultaneously have U-lag (2), wherein U-shaped magnetic core (2 ') is arranged in U-lag (2), and its thickness is not more than the degree of depth of U-lag (2); U-shaped magnetic core (1), (3) are enclosed in inside with U-shaped magnetic core (2 '), and bond together each other with bonding agent and to form compound magnetic core.
2. a kind of according to claim 1 differential mode choke is used magnetic core, it is characterized in that: U-shaped magnetic core (3) is identical with U-shaped magnetic core (1) shape, but magnetic core thickness is identical or different.
3. a kind of according to claim 1 differential mode choke is used magnetic core, it is characterized in that: U-shaped magnetic core (1), (3), (2 ') are the sintering magnetic cores through oversintering, or the magnetic powder core that is formed by the soft magnetism pressed by powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203514884U CN202307449U (en) | 2011-09-16 | 2011-09-16 | Magnetic core for differential-mode choking coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203514884U CN202307449U (en) | 2011-09-16 | 2011-09-16 | Magnetic core for differential-mode choking coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202307449U true CN202307449U (en) | 2012-07-04 |
Family
ID=46376293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203514884U Expired - Fee Related CN202307449U (en) | 2011-09-16 | 2011-09-16 | Magnetic core for differential-mode choking coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202307449U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368422A (en) * | 2011-09-16 | 2012-03-07 | 陆明岳 | Magnetic core used for differential-mode choking coil |
-
2011
- 2011-09-16 CN CN2011203514884U patent/CN202307449U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368422A (en) * | 2011-09-16 | 2012-03-07 | 陆明岳 | Magnetic core used for differential-mode choking coil |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102956344B (en) | A kind of composite cores structure and magnetics | |
| CN104810137B (en) | Reactor | |
| TWI571897B (en) | Three-phase reactor | |
| CN102637518B (en) | Method for preparing iron-based composite magnetic powder core | |
| JP2007128951A (en) | Reactor | |
| CN101789304A (en) | Magnetic element with permanent magnetic bias | |
| CN102610370A (en) | Composite soft magnetic core for resisting electromagnetic interference | |
| TW200826123A (en) | Noise filter and manufacturing method thereof | |
| CN104332263A (en) | Sintering type rare earth permanent magnet capable of reducing eddy-current loss and manufacturing method thereof | |
| CN201732654U (en) | Permanent-magnet bias magnetic element | |
| CN202307449U (en) | Magnetic core for differential-mode choking coil | |
| CN102368422A (en) | Magnetic core used for differential-mode choking coil | |
| CN202307447U (en) | Magnetic core for differential mode coil | |
| CN102368419A (en) | Magnetic core used for differential-mode coil | |
| CN208922882U (en) | A kind of common mode inductance, electromagnetic interface filter and Switching Power Supply | |
| CN202049839U (en) | Ferrite core | |
| CN106373734B (en) | High frequency transformer | |
| CN202067636U (en) | Ferrite magnetic core for transformer | |
| CN204288994U (en) | A kind of slug type rare-earth permanent magnet reducing eddy current loss | |
| CN202363214U (en) | Magnetic core for transformer | |
| CN102306536A (en) | Ferrite magnetic core | |
| CN206236521U (en) | High frequency transformer | |
| JP6668113B2 (en) | Inductor | |
| TWM465652U (en) | Improved structure of inductor | |
| CN212847924U (en) | Magnetic core, magnetic integrated device and circuit board, domestic appliance thereof |
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: 20120704 Termination date: 20140916 |
|
| EXPY | Termination of patent right or utility model |