CN102306537A - Ferrite magnetic core for fixed inductor - Google Patents
Ferrite magnetic core for fixed inductor Download PDFInfo
- Publication number
- CN102306537A CN102306537A CN 201110134747 CN201110134747A CN102306537A CN 102306537 A CN102306537 A CN 102306537A CN 201110134747 CN201110134747 CN 201110134747 CN 201110134747 A CN201110134747 A CN 201110134747A CN 102306537 A CN102306537 A CN 102306537A
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- China
- Prior art keywords
- fixed inductor
- ferrite
- magnetic core
- cylindrical
- ferrite magnetic
- 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 invention discloses a ferrite magnetic core for a fixed inductor. The ferrite magnetic core is characterized by comprising a cylindrical ferrite magnetic core (2), wherein a magnetized cylindrical permanent magnet ferrite piece (1) is adhered to one tail end of the cylindrical ferrite magnetic core (2). The directions of magnetic fields generated by the permanent magnet ferrite piece in the cylindrical ferrite magnetic core are opposite to the directions of magnetic fields generated by direct current (DC) in a fixed inductor winding in the cylindrical ferrite magnetic core. The partial magnetic fields generated by the DC in the fixed inductor winding are offset by the magnetic fields generated by the permanent magnet ferrite piece, so that larger DC can pass through the fixed inductor winding. By the ferrite magnetic core, the DC superposition property of the fixed inductor can be greatly improved, so that the larger DC can be permitted to pass through the fixed inductor.
Description
Technical field
The present invention relates to a kind of ferrite core, relate in particular to a kind of fixed inductor ferrite core.
Background technology
At present; Generally use ferrite core as fixed inductor 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 fixed inductor to allow to pass through is increasing, and this tends to cause the decline significantly of fixed inductor winding inductance, thereby makes the fixed inductor can't operate as normal.For preventing the generation of magnetic saturation phenomenon; Must improve the dc superposition characteristic of fixed inductor; 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 fixed inductor 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 fixed inductor 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 fixed inductor greatly for being operated in fixed inductor 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 fixed inductor ferrite core.
The technical scheme that the present invention adopted is: the present invention includes a cylindrical ferrite core; An end at cylindrical ferrite core; Paste a cylindrical magnet ferrite sheet that has magnetized, cylindrical magnet ferrite sheet direct current in magnetic direction that cylindrical ferrite magnetic is produced in the heart and fixed inductor winding is opposite at the magnetic direction that cylindrical ferrite magnetic is produced in the heart.
The invention has the beneficial effects as follows: because the permanent-magnet ferrite sheet magnetic direction that direct current produced in magnetic direction that cylindrical ferrite magnetic interior portion is produced and fixed inductor winding is opposite; Therefore; Some is offset the magnetic field that direct current produced in the fixed inductor winding by the magnetic field that the permanent-magnet ferrite sheet is produced, thereby can make in the fixed inductor winding through bigger direct current.Through the inventive method, can improve the dc superposition characteristic of fixed inductor greatly, fixed inductor 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 fixed inductor ferrite core structural representation.
Embodiment
In Fig. 1; Comprise a cylindrical ferrite core 2; Terminal paste a cylindrical magnet ferrite sheet 1 that has magnetized at one, cylindrical magnet ferrite sheet direct current in magnetic direction that cylindrical ferrite magnetic is produced in the heart and fixed inductor winding is 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 fixed inductor 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 fixed inductor winding.Through the inventive method, can improve the dc superposition characteristic of fixed inductor greatly, fixed inductor can be allowed through bigger direct current.
Claims (1)
1. a fixed inductor ferrite core is characterized in that: comprise a cylindrical ferrite core (2), at an end of cylindrical ferrite core (2), paste a cylindrical magnet ferrite sheet (1) that has magnetized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110134747 CN102306537A (en) | 2011-05-20 | 2011-05-20 | Ferrite magnetic core for fixed inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110134747 CN102306537A (en) | 2011-05-20 | 2011-05-20 | Ferrite magnetic core for fixed inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102306537A true CN102306537A (en) | 2012-01-04 |
Family
ID=45380381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110134747 Pending CN102306537A (en) | 2011-05-20 | 2011-05-20 | Ferrite magnetic core for fixed inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102306537A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02148706A (en) * | 1988-11-29 | 1990-06-07 | Taiyo Yuden Co Ltd | Linearity coil and manufacture thereof |
| CN101789304A (en) * | 2010-03-22 | 2010-07-28 | 福州大学 | Magnetic element with permanent magnetic bias |
| CN202049840U (en) * | 2011-05-20 | 2011-11-23 | 张家港市众力磁业有限公司 | Ferrite core for fixing inductor |
-
2011
- 2011-05-20 CN CN 201110134747 patent/CN102306537A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02148706A (en) * | 1988-11-29 | 1990-06-07 | Taiyo Yuden Co Ltd | Linearity coil and manufacture thereof |
| CN101789304A (en) * | 2010-03-22 | 2010-07-28 | 福州大学 | Magnetic element with permanent magnetic bias |
| CN202049840U (en) * | 2011-05-20 | 2011-11-23 | 张家港市众力磁业有限公司 | Ferrite core for fixing inductor |
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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 |