CN102306540A - Ferrite core for high-frequency transformer - Google Patents
Ferrite core for high-frequency transformer Download PDFInfo
- Publication number
- CN102306540A CN102306540A CN 201110134767 CN201110134767A CN102306540A CN 102306540 A CN102306540 A CN 102306540A CN 201110134767 CN201110134767 CN 201110134767 CN 201110134767 A CN201110134767 A CN 201110134767A CN 102306540 A CN102306540 A CN 102306540A
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- China
- Prior art keywords
- frequency transformer
- ferrite core
- direct current
- high frequency
- core
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- 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 invention discloses a ferrite core for a high-frequency transformer. The ferrite core is characterized by comprising a columnar ferrite core (1) on which two grooves are cut along the circumferential direction, wherein two coil windings which are used as a primary coil (3) and a secondary coil (4) of the transformer are wound in the two grooves; and a magnetized columnar permanent magnetic ferrite sheet (2) is adhered to one end of a magnetic core in a shape like a Chinese character 'wang'. Part of the magnetic field generated by direct current in the windings of the high-frequency transformer is counteracted by the magnetic field generated by the permanent magnetic ferrite core, so that higher direct current can pass through the windings of the high-frequency transformer; and by the method, superposition property of the direct current of the high-frequency transformer can be greatly improved, so that higher direct current can pass through the high-frequency transformer.
Description
Technical field
The present invention relates to a kind of ferrite core, relate in particular to a kind of high frequency transformer ferrite core.
Background technology
At present; Generally use ferrite core as the high-frequency electronic transformer 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; The direct current that requires high frequency transformer to allow to pass through is increasing, and this tends to cause the decline significantly of high frequency transformer winding inductance, thereby makes the high frequency transformer can't operate as normal.For preventing the generation of magnetic saturation phenomenon; Must improve the dc superposition characteristic of high frequency transformer; Traditional method is in the magnetic circuit of magnetic core, to open one section air gap; Perhaps simply make ferrite core become open-flux path; Although this method can be improved the dc superposition characteristic of high frequency transformer 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 Transformer 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 transformer greatly for being operated in high frequency transformer with big direct-current component.
Summary of the invention
Technical problem to be solved by this invention is the deficiency that overcomes prior art, provides a kind of electronic circuit that can be applied to have big direct-current component with the high frequency transformer ferrite core.
The technical scheme that the present invention adopted is: (this magnetic core profile vertically is king's font to the present invention includes a cylindrical ferrite core that along the circumferential direction cuts two grooves; Also can be referred to as king's font magnetic core); In two grooves; Two coil windings of coiling are as the primary coil and the secondary coil of transformer respectively; a section of king's font magnetic core; Paste a cylindrical magnet ferrite sheet that has magnetized, the magnetic direction that direct current produced in the magnetic direction that this permanent-magnet ferrite sheet is produced and the Transformer Winding is opposite.
The invention has the beneficial effects as follows: because the permanent-magnet ferrite sheet magnetic direction that direct current produced in the inner magnetic direction that is produced of king's font oxysome magnetic core and Transformer Winding is opposite; Therefore; Some is offset the magnetic field that direct current produced in the high frequency transformer winding by the magnetic field that the permanent-magnet ferrite magnetic core is produced, thereby can make in the high frequency transformer winding through bigger direct current.Through the inventive method, can improve the dc superposition characteristic of high frequency transformer greatly, high frequency transformer can be allowed through bigger direct current.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Fig. 1 is a high frequency transformer ferrite core structural representation.
Embodiment
In Fig. 1; Comprise that (this magnetic core profile vertically is king's font to a cylindrical ferrite core 1 that along the circumferential direction cuts two grooves; Also can be referred to as king's font magnetic core); In two grooves; Two coil windings of coiling are as the primary coil 3 and secondary coil 4 of transformer respectively; At an end of king's font magnetic core, paste a cylindrical magnet ferrite sheet 2 that has magnetized.
Because some is offset the magnetic field that direct current produced in the high frequency transformer 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 transformer winding.Through the inventive method, can improve the dc superposition characteristic of high frequency transformer greatly, high frequency transformer can be allowed through bigger direct current.
Claims (1)
1. high frequency transformer ferrite core; It is characterized in that: comprise a cylindrical ferrite core (1) that along the circumferential direction cuts two grooves; In two grooves; Two coil windings of coiling are as the primary coil (3) and the secondary coil 4 of transformer respectively; At an end of this ferrite core, paste a cylindrical magnet ferrite sheet (2) that has magnetized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110134767 CN102306540A (en) | 2011-05-20 | 2011-05-20 | Ferrite core for high-frequency transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110134767 CN102306540A (en) | 2011-05-20 | 2011-05-20 | Ferrite core for high-frequency transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102306540A true CN102306540A (en) | 2012-01-04 |
Family
ID=45380384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110134767 Pending CN102306540A (en) | 2011-05-20 | 2011-05-20 | Ferrite core for high-frequency transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102306540A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105895306A (en) * | 2015-02-18 | 2016-08-24 | Tdk株式会社 | Coil device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0880226A2 (en) * | 1997-05-23 | 1998-11-25 | TDK Corporation | Wirewound balun transformer |
| JP2000114052A (en) * | 1998-09-30 | 2000-04-21 | Taiyo Yuden Co Ltd | Magnetic core for surface mounting coil |
| CN1225752C (en) * | 2000-09-08 | 2005-11-02 | Nec东金株式会社 | Magnetic core having effective magnetic polarization and magnetic device using same |
| CN201251985Y (en) * | 2008-06-24 | 2009-06-03 | 四川长虹电器股份有限公司 | Magnetic core of transformer |
| CN202049841U (en) * | 2011-05-20 | 2011-11-23 | 张家港市众力磁业有限公司 | Ferrite core for high-frequency transformer |
-
2011
- 2011-05-20 CN CN 201110134767 patent/CN102306540A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0880226A2 (en) * | 1997-05-23 | 1998-11-25 | TDK Corporation | Wirewound balun transformer |
| JP2000114052A (en) * | 1998-09-30 | 2000-04-21 | Taiyo Yuden Co Ltd | Magnetic core for surface mounting coil |
| CN1225752C (en) * | 2000-09-08 | 2005-11-02 | Nec东金株式会社 | Magnetic core having effective magnetic polarization and magnetic device using same |
| CN201251985Y (en) * | 2008-06-24 | 2009-06-03 | 四川长虹电器股份有限公司 | Magnetic core of transformer |
| CN202049841U (en) * | 2011-05-20 | 2011-11-23 | 张家港市众力磁业有限公司 | Ferrite core for high-frequency transformer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105895306A (en) * | 2015-02-18 | 2016-08-24 | Tdk株式会社 | Coil device |
| CN105895306B (en) * | 2015-02-18 | 2018-02-27 | Tdk株式会社 | Coil component |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120104 |