CN202049842U - Ferrite core for high-frequency choke coil - Google Patents
Ferrite core for high-frequency choke coil Download PDFInfo
- Publication number
- CN202049842U CN202049842U CN2011201670093U CN201120167009U CN202049842U CN 202049842 U CN202049842 U CN 202049842U CN 2011201670093 U CN2011201670093 U CN 2011201670093U CN 201120167009 U CN201120167009 U CN 201120167009U CN 202049842 U CN202049842 U CN 202049842U
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- CN
- China
- Prior art keywords
- choke coil
- ferrite core
- cylindrical
- frequency choke
- high frequency
- 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.)
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Abstract
The utility model discloses a ferrite core for a high-frequency choke coil, which is characterized by comprising a cylindrical ferrite core (1). The two ends of the cylindrical ferrite core (1) are equipped with cylindrical grooves. Two magnetized cylindrical permanent magnet oxidation sheets (2) and (2') are respectively adhered into the cylindrical grooves at the two ends of the cylindrical ferrite core. The directions of the magnetic fields generated by the two cylindrical permanent magnet oxidation sheets on the cylindrical ferrite core are the same with each other, which are opposite to the direction of the magnetic field generated by a DC current in a choke coil winding on the cylindrical ferrite core. Since part of the magnetic field generated by the DC current in the high-frequency choke coil winding is cancelled by the magnetic fields generated by the two permanent magnet oxidation sheets, a larger DC current can pass through the high-frequency choke coil winding. By utilizing the ferrite core, the direct-current superposition characteristic of the high-frequency choke coil is greatly improved, so that a larger DC current can pass through the high-frequency choke coil.
Description
Technical field
The utility model relates to a kind of ferrite core, relates in particular to a kind of high frequency choke coil ferrite core.
Background technology
At present, generally use ferrite core as high frequency choke coil in the high-frequency circuit, develop rapidly along with electronic technology, require electronic devices and components constantly to develop to miniaturization and high power direction, in order to satisfy this growth requirement, require high frequency choke coil to allow the direct current that passes through increasing, and this tends to cause the decline significantly of high frequency choke coil winding inductance, thereby make the high frequency choke coil can't operate as normal.For preventing the generation of magnetic saturation phenomenon, must improve the dc superposition characteristic of high frequency choke coil, traditional method is to open one section air gap in the magnetic circuit of magnetic core, perhaps simply make ferrite core become open-flux path, although this method can be improved the dc superposition characteristic of high frequency choke coil to a certain extent, but improved degree is very limited, especially for the ferrite core that is operated under the high frequency condition, often adopt the NiZn Ferrite Material, and the NiZn Ferrite Material is easy to occur saturation magnetization, thereby the choke winding inductance is sharply descended because saturation flux density is lower, this can make the electronic equipment can't operate as normal, even burns.Therefore,, only adopt open-flux path, can't improve the dc superposition characteristic of high frequency choke coil greatly for being operated in high frequency choke coil with big direct-current component.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, provides a kind of electronic circuit that can be applied to have big direct-current component with the high frequency choke coil ferrite core.
The technical scheme that the utility model adopted is: the utility model comprises a cylindrical ferrite core, two ends at cylindrical ferrite core, respectively open a cylinder shape groove, the axis of cylinder shape groove and cylindrical ferrite core overlaps, in two grooves, respectively paste a cylindrical magnet ferrite sheet that has magnetized, two cylindrical magnet ferrite sheets are consistent at the magnetic direction that cylindrical ferrite magnetic is produced in the heart, but with the choke winding in direct current be opposite at the magnetic direction that cylindrical ferrite magnetic is produced in the heart.
The beneficial effects of the utility model are: because two permanent-magnet ferrite sheets magnetic direction that direct current produced in magnetic direction that cylindrical ferrite magnetic interior portion is produced and choke winding is opposite, therefore, some is offset the magnetic field that direct current produced in the high frequency choke coil winding by the magnetic field that the permanent-magnet ferrite magnetic core is produced, thereby can make in the high frequency choke coil winding by bigger direct current.By the inventive method, can improve the dc superposition characteristic of high frequency choke coil greatly, high frequency choke coil can be allowed by bigger direct current.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is a high frequency choke coil ferrite core structural representation.
Embodiment
In Fig. 1, comprise a cylindrical ferrite core 1, in the cylinder shape groove of two ends, paste respectively two cylindrical magnet ferrite sheets 2 and 2 that magnetized ', two cylindrical magnet ferrite sheets are consistent at the magnetic direction that cylindrical ferrite magnetic is produced in the heart, but with the choke winding in direct current be opposite at the magnetic direction that cylindrical ferrite magnetic is produced in the heart.
Because some is offset the magnetic field that direct current produced in the high frequency choke coil winding by the magnetic field that the permanent-magnet ferrite magnetic core is produced, and can pass through bigger direct current thereby can make in the high frequency choke coil winding.By the inventive method, can improve the dc superposition characteristic of high frequency choke coil greatly, high frequency choke coil can be allowed by bigger direct current.
Claims (1)
1. high frequency choke coil ferrite core, it is characterized in that: comprise a cylindrical ferrite core (1), two ends at cylindrical ferrite core (1), have cylinder shape groove, paste two cylindrical magnet ferrite sheet (2) and (2 ') of having magnetized in cylinder shape groove respectively, two cylindrical magnet ferrite sheets are consistent at the magnetic direction that cylindrical ferrite magnetic is produced in the heart.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201670093U CN202049842U (en) | 2011-05-20 | 2011-05-20 | Ferrite core for high-frequency choke coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201670093U CN202049842U (en) | 2011-05-20 | 2011-05-20 | Ferrite core for high-frequency choke coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202049842U true CN202049842U (en) | 2011-11-23 |
Family
ID=44990142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201670093U Expired - Fee Related CN202049842U (en) | 2011-05-20 | 2011-05-20 | Ferrite core for high-frequency choke coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202049842U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102306538A (en) * | 2011-05-20 | 2012-01-04 | 张家港市众力磁业有限公司 | Ferrite magnetic core for high-frequency choke coil |
-
2011
- 2011-05-20 CN CN2011201670093U patent/CN202049842U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102306538A (en) * | 2011-05-20 | 2012-01-04 | 张家港市众力磁业有限公司 | Ferrite magnetic core for high-frequency choke coil |
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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: 20111123 Termination date: 20160520 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |