CN102543377A - High-frequency choking coil magnetic core for LEDs - Google Patents
High-frequency choking coil magnetic core for LEDs Download PDFInfo
- Publication number
- CN102543377A CN102543377A CN2012100397229A CN201210039722A CN102543377A CN 102543377 A CN102543377 A CN 102543377A CN 2012100397229 A CN2012100397229 A CN 2012100397229A CN 201210039722 A CN201210039722 A CN 201210039722A CN 102543377 A CN102543377 A CN 102543377A
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- China
- Prior art keywords
- magnetic
- magnetic core
- choking coil
- direct current
- high frequency
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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 high-frequency choking coil magnetic core for LEDs, which is characterized by comprising two U-shaped ferrite magnetic cores (1), an elongated magnetic core (2) and four magnetized rectangular permanent-magnetic ferrite magnets (3, 4, 5 and 6). The directions of the magnetic fields generated by the four rectangular permanent-magnetic ferrite magnets in the elongated magnetic core are identical but opposite to that of the magnetic field generated by the direct current in a choking coil winding on the elongated magnetic core. Since the magnetic field generated by the direct current in the high-frequency choking coil winding is partially offset by the magnetic fields generated by the four permanent-magnetic ferrite magnets, the DC superposition characteristic of the high-frequency choking coil can be improved greatly by the high-frequency choking coil magnetic core, and higher direct current can be allowed to pass the high-frequency choking coil.
Description
Technical field
The present invention relates to a kind of ferrite core, relate in particular to a kind of LED and use the high frequency choke coil magnetic core.
Background technology
At present; Generally use ferrite core as high frequency choke coil in the led drive circuit,, require electronic devices and components constantly to develop to miniaturization and high power direction along with the develop rapidly of LED electronic technology; In order to satisfy this growth requirement; The direct current that requires high frequency choke coil to allow to pass through is increasing, and this tends to cause the decline significantly of high frequency choke coil winding inductance, thereby makes 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 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 choke coil to a certain extent, 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 because saturation flux density is lower; Be easy to occur saturation magnetization; Thereby the choke winding inductance is sharply descended, and 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 by this invention is the deficiency that overcomes prior art, provides a kind of electronic circuit that can be applied to have than big direct-current component to use ferrite core with high frequency choke coil.
The technical scheme that the present invention adopted is: the present invention includes two U-iron oxysome magnetic cores and a bar shaped magnetic core; Between the interface of bar shaped magnetic core and two U-shaped magnetic cores; Each places a cuboid ferrimagnet that has magnetized; The magnetic direction that these four permanent-magnet ferrite magnets produce in the bar shaped magnetic core is identical, but with the bar shaped magnetic core on the choke winding in magnetic direction that direct current produced opposite.
The invention has the beneficial effects as follows: because the magnetic direction that in the bar shaped magnetic core, produces of these four permanent-magnet ferrite magnets is identical, and with the bar shaped magnetic core on direct current produced in the choke winding magnetic direction opposite.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 magnet is produced, thereby can make in the high frequency choke coil winding through bigger direct current.Through the inventive method, can improve the dc superposition characteristic of high frequency choke coil greatly, high frequency choke coil 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 that high frequency choke coil is used the ferrite core structural representation.
Embodiment
In Fig. 1; Comprise two U-iron oxysome magnetic cores 1; A bar shaped magnetic core 2; Four cuboid permanent- magnet ferrite magnets 3,4,5,6 that magnetized, the magnetic direction that these four permanent-magnet ferrite magnets produce in the bar shaped magnetic core is identical, and with the bar shaped magnetic core on direct current produced in the choke winding magnetic direction opposite.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 magnet is produced, and can pass through bigger direct current thereby can make in the high frequency choke coil winding.Through the inventive method, can improve the dc superposition characteristic of high frequency choke coil greatly, high frequency choke coil can be allowed through bigger direct current.
Claims (1)
1. a LED uses the high frequency choke coil magnetic core; It is characterized in that: comprise two U-iron oxysome magnetic cores (1); A bar shaped magnetic core (2); Four cuboid permanent-magnet ferrite magnet (3), (4), (5), (6) of having magnetized, the magnetic direction that these four permanent-magnet ferrite magnets produce in the bar shaped magnetic core is identical, and with the bar shaped magnetic core on direct current produced in the choke winding magnetic direction opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100397229A CN102543377A (en) | 2012-02-22 | 2012-02-22 | High-frequency choking coil magnetic core for LEDs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100397229A CN102543377A (en) | 2012-02-22 | 2012-02-22 | High-frequency choking coil magnetic core for LEDs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102543377A true CN102543377A (en) | 2012-07-04 |
Family
ID=46350039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100397229A Pending CN102543377A (en) | 2012-02-22 | 2012-02-22 | High-frequency choking coil magnetic core for LEDs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102543377A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08316049A (en) * | 1994-12-09 | 1996-11-29 | Yaskawa Electric Corp | Dc reactor |
| JPH11273955A (en) * | 1998-03-19 | 1999-10-08 | Tokin Corp | Winding component |
| CN1325120A (en) * | 2000-05-22 | 2001-12-05 | 达方电子股份有限公司 | Transformer |
| CN1360319A (en) * | 2000-11-30 | 2002-07-24 | 株式会社东金 | Magnetic core contg. magnetic bias magnet and induction element with said magnetic core |
| CN2509694Y (en) * | 2001-04-27 | 2002-09-04 | 台达电子工业股份有限公司 | Thin transformer |
| JP2004266217A (en) * | 2003-03-04 | 2004-09-24 | Mitsubishi Electric Corp | Direct current reactor |
| JP2007173455A (en) * | 2005-12-21 | 2007-07-05 | Fdk Corp | Winding component |
| US7365630B1 (en) * | 2007-06-24 | 2008-04-29 | Taipei Multipower Electronics Co., Ltd. | Low magnetic leakage high voltage transformer |
| CN201402704Y (en) * | 2009-01-08 | 2010-02-10 | 清流县鑫磁线圈制品有限公司 | Inductance device |
| 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 |
| CN202513000U (en) * | 2012-02-22 | 2012-10-31 | 临沂中瑞电子有限公司 | Magnetic core of high-frequency choke coil for light-emitting diode (LED) |
-
2012
- 2012-02-22 CN CN2012100397229A patent/CN102543377A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08316049A (en) * | 1994-12-09 | 1996-11-29 | Yaskawa Electric Corp | Dc reactor |
| JPH11273955A (en) * | 1998-03-19 | 1999-10-08 | Tokin Corp | Winding component |
| CN1325120A (en) * | 2000-05-22 | 2001-12-05 | 达方电子股份有限公司 | Transformer |
| CN1360319A (en) * | 2000-11-30 | 2002-07-24 | 株式会社东金 | Magnetic core contg. magnetic bias magnet and induction element with said magnetic core |
| CN2509694Y (en) * | 2001-04-27 | 2002-09-04 | 台达电子工业股份有限公司 | Thin transformer |
| JP2004266217A (en) * | 2003-03-04 | 2004-09-24 | Mitsubishi Electric Corp | Direct current reactor |
| JP2007173455A (en) * | 2005-12-21 | 2007-07-05 | Fdk Corp | Winding component |
| US7365630B1 (en) * | 2007-06-24 | 2008-04-29 | Taipei Multipower Electronics Co., Ltd. | Low magnetic leakage high voltage transformer |
| CN201402704Y (en) * | 2009-01-08 | 2010-02-10 | 清流县鑫磁线圈制品有限公司 | Inductance device |
| 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 |
| CN202513000U (en) * | 2012-02-22 | 2012-10-31 | 临沂中瑞电子有限公司 | Magnetic core of high-frequency choke coil for light-emitting diode (LED) |
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Legal Events
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|---|---|---|---|
| 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: 20120704 |