CN202049838U - Ferrite core for differential mode choking coil - Google Patents
Ferrite core for differential mode choking coil Download PDFInfo
- Publication number
- CN202049838U CN202049838U CN201120166972XU CN201120166972U CN202049838U CN 202049838 U CN202049838 U CN 202049838U CN 201120166972X U CN201120166972X U CN 201120166972XU CN 201120166972 U CN201120166972 U CN 201120166972U CN 202049838 U CN202049838 U CN 202049838U
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- CN
- China
- Prior art keywords
- differential mode
- choking coil
- direct current
- ferrite
- mode choking
- 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 differential mode choking coil. The ferrite core comprises two U-shaped ferrite cores (1). Two magnetized cuboid-shaped permanent ferrite sheets (2) and (2') are arranged between two mutually butted joint surfaces of the U-shaped ferrite core; the magnetic field directions of the two permanent ferrite sheets which are generated in the two U-shaped ferrite cores are consistent; and the generated magnetic field direction of the two permanent ferrite sheets are reverse to the magnetic field direction which is generated by the direct current in a differential mode choking coil winding. As one part of the magnetic field generated by the direct current in the differential mode choking coil winding is counteracted by the magnetic field generated by the permanent ferrite sheet, the larger direct current can pass through the differential mode choking coil winding. With the adoption of the ferrite core for the differential mode choking coil, the direct current overlapping property of the differential mode choking coil can be greatly increased, and the larger direct current can pass through the differential mode choking coil.
Description
Technical field
The utility model relates to a kind of ferrite core, relates in particular to a kind of differential mode choke ferrite core.
Background technology
At present, generally use ferrite core as the differential mode choke 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 the differential mode choke to allow the direct current that passes through increasing, and this tends 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 to open one section air gap in the magnetic circuit of magnetic core, 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 ferrite core magnetic circuit can not be opened very greatly, otherwise, inductance is very low, and leakage field is very big, can produce certain electromagnetic interference to other electronic devices and components.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, and a kind of electronic circuit differential mode choke that can be applied to have big direct-current component is provided.
The technical scheme that the utility model adopted is: the utility model comprises two mutual butted U shape ferrite cores, between two faying faces that dock mutually of U-iron oxysome magnetic core, respectively put a rectangular-shaped permanent-magnet ferrite sheet that has magnetized, these two permanent-magnet ferrite sheets are consistent at the magnetic direction that produced of two U-iron oxysome magnetic core inside of butt joint, and the magnetic direction that direct current produced in the magnetic direction that it produced and the Transformer Winding is opposite.
The beneficial effects of the utility model are: because these two permanent-magnet ferrite sheets magnetic direction that direct current produced in the magnetic direction that produced of two U-iron oxysome magnetic core inside of butt joint and Transformer Winding is opposite, therefore, some is offset the magnetic field that direct current produced in the differential mode choke winding by the magnetic field that the permanent-magnet ferrite magnetic core is produced, thereby can make in the differential mode choke winding by bigger direct current.By the inventive method, can improve the dc superposition characteristic of differential mode choke greatly, the differential mode choke 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 that two U-iron oxysome magnetic cores and two permanent-magnet ferrite sheets are combined into the ferrite core structural representation.
Embodiment
In Fig. 1, two U-iron oxysome magnetic cores 1, between its two faying faces that dock mutually, be placed with two rectangular-shaped permanent- magnet ferrite sheets 2 and 2 that magnetized ', the magnetic direction that these two permanent-magnet ferrite sheets produce in two U-iron oxysome magnetic cores is consistent, and the magnetic direction that direct current produced in the magnetic direction that it produced and the Transformer Winding is opposite.Because some is offset the magnetic field that direct current produced in the differential mode choke winding by the magnetic field that the permanent-magnet ferrite sheet is produced, thereby can make in the differential mode choke winding by bigger direct current.By the inventive method, can improve the dc superposition characteristic of differential mode choke greatly, the differential mode choke can be allowed by bigger direct current.
Claims (1)
1. differential mode choke ferrite core, it is characterized in that: comprise two U-iron oxysome magnetic cores (1), between its two faying faces that dock mutually, be placed with two rectangular-shaped permanent-magnet ferrite sheet (2) and (2 ') of having magnetized, the magnetic direction that these two permanent-magnet ferrite sheets produce in two U-iron oxysome magnetic cores is consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120166972XU CN202049838U (en) | 2011-05-20 | 2011-05-20 | Ferrite core for differential mode choking coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120166972XU CN202049838U (en) | 2011-05-20 | 2011-05-20 | Ferrite core for differential mode choking coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202049838U true CN202049838U (en) | 2011-11-23 |
Family
ID=44990138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120166972XU Expired - Fee Related CN202049838U (en) | 2011-05-20 | 2011-05-20 | Ferrite core for differential mode choking coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202049838U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102306539A (en) * | 2011-05-20 | 2012-01-04 | 张家港市众力磁业有限公司 | Ferrite magnetic core for differential mode choke coil |
| CN102543374A (en) * | 2012-02-08 | 2012-07-04 | 鸿康磁业电子（昆山）有限公司 | Novel transformer |
| CN102543375A (en) * | 2012-02-22 | 2012-07-04 | 临沂中瑞电子有限公司 | Transformer magnetic core for LEDs |
| CN102568768A (en) * | 2012-02-22 | 2012-07-11 | 临沂中瑞电子有限公司 | Fixed inductance magnetic core for LED (light emitting diode) |
-
2011
- 2011-05-20 CN CN201120166972XU patent/CN202049838U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102306539A (en) * | 2011-05-20 | 2012-01-04 | 张家港市众力磁业有限公司 | Ferrite magnetic core for differential mode choke coil |
| CN102543374A (en) * | 2012-02-08 | 2012-07-04 | 鸿康磁业电子（昆山）有限公司 | Novel transformer |
| CN102543375A (en) * | 2012-02-22 | 2012-07-04 | 临沂中瑞电子有限公司 | Transformer magnetic core for LEDs |
| CN102568768A (en) * | 2012-02-22 | 2012-07-11 | 临沂中瑞电子有限公司 | Fixed inductance magnetic core for LED (light emitting diode) |
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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: 20111123 Termination date: 20160520 |