CN102543376A - Differential-mode choking coil magnetic core for LEDs - Google Patents
Differential-mode choking coil magnetic core for LEDs Download PDFInfo
- Publication number
- CN102543376A CN102543376A CN2012100397110A CN201210039711A CN102543376A CN 102543376 A CN102543376 A CN 102543376A CN 2012100397110 A CN2012100397110 A CN 2012100397110A CN 201210039711 A CN201210039711 A CN 201210039711A CN 102543376 A CN102543376 A CN 102543376A
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- magnetic
- differential
- magnetic core
- choking coil
- direct current
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Abstract
The invention discloses a differential-mode choking coil magnetic core for LEDs, which comprises two U-shaped ferrite magnetic cores (1). A magnetized rectangular permanent-magnetic ferrite magnetic core (2) is disposed between two butted sides of the two U-shaped ferrite magnetic core (1), and the direction of the magnetic field generated by the permanent-magnetic ferrite magnetic core in the two U-shaped ferrite magnetic core is opposite to that of the magnetic field generated by direct current in a differential-mode choking coil winding. Since the magnetic field generated by direct current in the differential-mode choking coil winding is partially offset by the magnetic field generated by the permanent-magnetic ferrite magnetic core, the direct current overlapping performance of the differential-mode choking coil can be improved greatly by the differential-mode choking coil magnetic core, and higher direct current can be allowed to pass the differential-mode choking coil.
Description
Technical field
The present invention relates to a kind of ferrite core, relate in particular to a kind of LED with differential mode choke magnetic core.
Background technology
At present; Generally use ferrite core as the differential mode choke in the led drive circuit, the develop rapidly along with the LED technology requires 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 the differential mode choke to allow to pass through is increasing, and this tends to cause the decline significantly of differential mode choke winding inductance, thereby makes 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 in the magnetic circuit of magnetic core, to open one section air gap, 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 to other electronic devices and components and disturb.
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 differential mode choke.
The technical scheme that the present invention adopted is: the present invention includes two mutual butted U shape ferrite cores; Between the interface of one of them butt joint of U-iron oxysome magnetic core, place a rectangular-shaped permanent-magnet ferrite magnet that has magnetized; This permanent-magnet ferrite magnet is identical at the inner magnetic direction that is produced of two U-iron oxysome magnetic cores of butt joint, and the magnetic direction that direct current produced in magnetic direction that it produced and the Transformer Winding is opposite.
The invention has the beneficial effects as follows: because this permanent-magnet ferrite magnet magnetic direction that direct current produced in inner magnetic direction that is produced of two U-iron oxysome magnetic cores 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 through bigger direct current.Through the inventive method, can improve the dc superposition characteristic of differential mode choke greatly, the differential mode choke 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 two U-iron oxysome magnetic cores become the ferrite core structural representation with the permanent-magnet ferrite magnet combination.
Embodiment
In Fig. 1; Two U-iron oxysome magnetic cores 1; Between its interface that docks each other; Be placed with a rectangular-shaped permanent-magnet ferrite magnet 2 that has magnetized, the magnetic direction that this permanent-magnet ferrite magnet produces in two U-iron oxysome magnetic cores is identical, and the magnetic direction that direct current produced in magnetic direction that it produced and the Transformer Winding is opposite.
Advantage of the present invention is: since in the differential mode choke winding magnetic field that direct current produced some offset by the magnetic field that the permanent-magnet ferrite sheet is produced, thereby can make in the differential mode choke winding through bigger direct current.Through the inventive method, can improve the dc superposition characteristic of differential mode choke greatly, the differential mode choke can be allowed through bigger direct current.
Claims (1)
1. a LED is with differential mode choke magnetic core; It is characterized in that: comprise two U-iron oxysome magnetic cores (1); Between its interface that docks each other; Place a rectangular-shaped permanent-magnet ferrite magnet (2) that has magnetized, the magnetic direction that direct current produced in magnetic direction that this permanent-magnet ferrite magnet produces in two U-iron oxysome magnetic cores and the differential mode choke winding is opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100397110A CN102543376A (en) | 2012-02-22 | 2012-02-22 | Differential-mode choking coil magnetic core for LEDs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100397110A CN102543376A (en) | 2012-02-22 | 2012-02-22 | Differential-mode choking coil magnetic core for LEDs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102543376A true CN102543376A (en) | 2012-07-04 |
Family
ID=46350038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100397110A Pending CN102543376A (en) | 2012-02-22 | 2012-02-22 | Differential-mode choking coil magnetic core for LEDs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102543376A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111462981A (en) * | 2019-01-18 | 2020-07-28 | 泰达电子股份有限公司 | Integrated magnetic component |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2356409Y (en) * | 1998-12-18 | 1999-12-29 | 吴加林 | Small volume, high efficiency DC reactor |
| JP2003124041A (en) * | 2001-10-19 | 2003-04-25 | Nec Tokin Corp | Inductor part |
| CN102306534A (en) * | 2011-05-20 | 2012-01-04 | 张家港市众力磁业有限公司 | Ferrite magnetic core for transformer |
| 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 |
| CN202513001U (en) * | 2012-02-22 | 2012-10-31 | 临沂中瑞电子有限公司 | Differential mode choking coil magnetic core for light-emitting diode (LED) |
-
2012
- 2012-02-22 CN CN2012100397110A patent/CN102543376A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2356409Y (en) * | 1998-12-18 | 1999-12-29 | 吴加林 | Small volume, high efficiency DC reactor |
| JP2003124041A (en) * | 2001-10-19 | 2003-04-25 | Nec Tokin Corp | Inductor part |
| CN102306534A (en) * | 2011-05-20 | 2012-01-04 | 张家港市众力磁业有限公司 | Ferrite magnetic core for transformer |
| 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 |
| CN202513001U (en) * | 2012-02-22 | 2012-10-31 | 临沂中瑞电子有限公司 | Differential mode choking coil magnetic core for light-emitting diode (LED) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111462981A (en) * | 2019-01-18 | 2020-07-28 | 泰达电子股份有限公司 | Integrated magnetic component |
| CN111462981B (en) * | 2019-01-18 | 2024-05-14 | 泰达电子股份有限公司 | Integrated magnetic 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: 20120704 |