CN102568768A - Fixed inductance magnetic core for LED (light emitting diode) - Google Patents
Fixed inductance magnetic core for LED (light emitting diode) Download PDFInfo
- Publication number
- CN102568768A CN102568768A CN2012100397411A CN201210039741A CN102568768A CN 102568768 A CN102568768 A CN 102568768A CN 2012100397411 A CN2012100397411 A CN 2012100397411A CN 201210039741 A CN201210039741 A CN 201210039741A CN 102568768 A CN102568768 A CN 102568768A
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- magnetic core
- fixed inductance
- direct current
- magnet
- magnetic
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Abstract
The invention discloses a fixed inductance magnetic core for an LED. The fixed inductance magnetic core is characterized in that the inductance magnetic core comprises a T-shaped ferrite magnetic core (1), a U-shaped ferrite magnetic core (2), and a magnetized rectangular permanent ferrite magnet (3); the permanent ferrite magnet is located between the top end of the T-shaped magnetic core and the inner bottom surface of the U-shaped magnetic core; and the direction of a magnetic field generated by the permanent ferrite magnet is opposite to that of a magnetic field generated in a T-shaped pillar by direct current in a winding. Because the magnetic field generated by the direct current in the fixed inductance winding is partially is counteracted by the magnetic field generated by the permanent ferrite magnet, the fixed inductance magnetic core provided by the invention can greatly improve direct current overlapping property of a fixed inductance, so that the fixed inductance can allow larger direct current to pass through.
Description
Technical field
The present invention relates to a kind of ferrite core, relate in particular to a kind of LED and use the fixed inductance magnetic core.
Background technology
At present; Generally use ferrite core as fixed inductance 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 fixed inductance to allow to pass through is increasing, and this tends to cause the decline significantly of fixed inductance winding inductance, thereby makes the fixed inductance can't operate as normal.For preventing the generation of magnetic saturation phenomenon, must improve the dc superposition characteristic of fixed inductance, 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 inductance 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 fixed inductance 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 fixed inductance greatly for being operated in fixed inductance 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 led drive circuit that can be applied to have than big direct-current component to use the fixed inductance magnetic core.
The technical scheme that the present invention adopted is: the present invention includes a T shape magnetic core and a U-shaped magnetic core; Between the inner bottom surface of the top of T shape magnetic core and U-shaped magnetic core; Place a cuboid permanent-magnet ferrite magnet that has magnetized, the magnetic direction that direct current is produced in T shape pillar in magnetic field that this permanent-magnet ferrite magnet is produced and the winding is opposite.
The invention has the beneficial effects as follows: because the magnetic direction that direct current is produced in T shape pillar in magnetic field that the permanent-magnet ferrite magnet is produced and the winding is opposite.Therefore, some is offset the magnetic field that direct current produced in the fixed inductance winding by the magnetic field that the permanent-magnet ferrite sheet is produced, thereby can make in the fixed inductance winding through bigger direct current.Through the inventive method, can improve the dc superposition characteristic of fixed inductance greatly, fixed inductance 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 LED is with fixed inductance ferrite core structural representation.
Embodiment
Among Fig. 1; Comprise a T shape ferrite core 1; A U-iron oxysome magnetic core 2, and a cuboid permanent-magnet ferrite magnet 3 that has magnetized, the magnetic direction that direct current is produced in T shape pillar in magnetic field that this permanent-magnet ferrite magnet is produced and the winding is opposite.
Because some is offset the magnetic field that direct current produced in the fixed inductance 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 inductance greatly, fixed inductance can be allowed through bigger direct current.
Claims (1)
1. a LED uses the fixed inductance magnetic core; It is characterized in that: comprise a T shape ferrite core (1); A U-iron oxysome magnetic core (2); And a cuboid permanent-magnet ferrite magnet (3) that has magnetized, this permanent-magnet ferrite magnet is between the inner bottom surface of the top of T shape magnetic core and U-shaped magnetic core, and the magnetic direction that direct current is produced in T shape pillar in magnetic field that the permanent-magnet ferrite magnet is produced and the winding is opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100397411A CN102568768A (en) | 2012-02-22 | 2012-02-22 | Fixed inductance magnetic core for LED (light emitting diode) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100397411A CN102568768A (en) | 2012-02-22 | 2012-02-22 | Fixed inductance magnetic core for LED (light emitting diode) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102568768A true CN102568768A (en) | 2012-07-11 |
Family
ID=46413947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100397411A Pending CN102568768A (en) | 2012-02-22 | 2012-02-22 | Fixed inductance magnetic core for LED (light emitting diode) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102568768A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87207133U (en) * | 1987-06-03 | 1988-03-09 | 邓茂裕 | Inductive ballast of fluorescent lamp |
| JPS63192209A (en) * | 1987-02-05 | 1988-08-09 | Omron Tateisi Electronics Co | Polarized electromagnet device |
| CN2091054U (en) * | 1991-02-02 | 1991-12-18 | 朱泰生 | Induction ballast |
| CN1359114A (en) * | 2000-11-28 | 2002-07-17 | 株式会社东金 | Magnetic core contaiing addrssive magnet with magnetic power with anti-oxidation metal coated on surface |
| CN1363939A (en) * | 2000-10-25 | 2002-08-14 | 株式会社东金 | Magnet core with magnetic deflecting body and inductor therewith |
| CN1433033A (en) * | 2001-05-30 | 2003-07-30 | Nec东金株式会社 | Inductance part with permanent magnet set in magnetic gap |
| CN201069692Y (en) * | 2007-08-01 | 2008-06-04 | 昆山维峻电子有限公司 | Mutual inductance iron core |
| CN201207323Y (en) * | 2008-04-30 | 2009-03-11 | 厦门南磁电子有限公司 | Magnetic core combining U-shaped magnetic body and T-shaped magnetic body |
| CN202049838U (en) * | 2011-05-20 | 2011-11-23 | 张家港市众力磁业有限公司 | Ferrite core for differential mode choking coil |
| CN202512999U (en) * | 2012-02-22 | 2012-10-31 | 临沂中瑞电子有限公司 | Fixed inductor core used for LED drive circuit |
-
2012
- 2012-02-22 CN CN2012100397411A patent/CN102568768A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63192209A (en) * | 1987-02-05 | 1988-08-09 | Omron Tateisi Electronics Co | Polarized electromagnet device |
| CN87207133U (en) * | 1987-06-03 | 1988-03-09 | 邓茂裕 | Inductive ballast of fluorescent lamp |
| CN2091054U (en) * | 1991-02-02 | 1991-12-18 | 朱泰生 | Induction ballast |
| CN1363939A (en) * | 2000-10-25 | 2002-08-14 | 株式会社东金 | Magnet core with magnetic deflecting body and inductor therewith |
| CN1359114A (en) * | 2000-11-28 | 2002-07-17 | 株式会社东金 | Magnetic core contaiing addrssive magnet with magnetic power with anti-oxidation metal coated on surface |
| CN1433033A (en) * | 2001-05-30 | 2003-07-30 | Nec东金株式会社 | Inductance part with permanent magnet set in magnetic gap |
| CN201069692Y (en) * | 2007-08-01 | 2008-06-04 | 昆山维峻电子有限公司 | Mutual inductance iron core |
| CN201207323Y (en) * | 2008-04-30 | 2009-03-11 | 厦门南磁电子有限公司 | Magnetic core combining U-shaped magnetic body and T-shaped magnetic body |
| CN202049838U (en) * | 2011-05-20 | 2011-11-23 | 张家港市众力磁业有限公司 | Ferrite core for differential mode choking coil |
| CN202512999U (en) * | 2012-02-22 | 2012-10-31 | 临沂中瑞电子有限公司 | Fixed inductor core used for LED drive circuit |
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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: 20120711 |