CN202513001U - Differential mode choking coil magnetic core for light-emitting diode (LED) - Google Patents
Differential mode choking coil magnetic core for light-emitting diode (LED) Download PDFInfo
- Publication number
- CN202513001U CN202513001U CN2012200569184U CN201220056918U CN202513001U CN 202513001 U CN202513001 U CN 202513001U CN 2012200569184 U CN2012200569184 U CN 2012200569184U CN 201220056918 U CN201220056918 U CN 201220056918U CN 202513001 U CN202513001 U CN 202513001U
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- China
- Prior art keywords
- differential mode
- choking coil
- direct current
- magnetic
- magnetic 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 utility model discloses a differential mode choking coil magnetic core for a light-emitting diode (LED). The magnetic core is characterized by comprising two U-shaped ferromagnetic cores (1), wherein a cuboidal magnetized ferrite permanent magnet (2) is arranged between the jointed surfaces of the two U-shaped ferromagnetic cores (1); and the direction of a magnetic field generated by the ferrite permanent magnet in the two U-shaped ferromagnetic cores is opposite to that of a magnetic field generated by direct current in a differential mode choking coil winding. A part of the magnetic field generated by the direct current in the differential mode choking coil winding is counteracted by the magnetic field generated by the ferrite permanent magnet. By the magnetic core, the direct current superposition characteristics of a differential mode choking coil can be greatly improved, and high direct current can be allowed to pass through the differential mode choking coil.
Description
Technical field
The utility model relates to a kind of ferrite core, relates in particular to a kind of LED of being used for 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.
The utility model content
The utility model technical problem to be solved 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 utility model adopted is: the utility model comprises two mutual butted U shape ferrite cores; Between the interface of one of them butt joint of U-iron oxysome magnetic core, put 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 differential mode choke winding is opposite.
The beneficial effect of the utility model is: 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 differential mode choke 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 utility model 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 utility model 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 differential mode choke winding is opposite.
The utility model has the advantages that: since in the differential mode choke winding magnetic field that direct current produced some offset by the magnetic field that the permanent-magnet ferrite magnet is produced, thereby can make in the differential mode choke winding through bigger direct current.Through the utility model 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. one kind is used for LED 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 |
|---|---|---|---|
| CN2012200569184U CN202513001U (en) | 2012-02-22 | 2012-02-22 | Differential mode choking coil magnetic core for light-emitting diode (LED) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200569184U CN202513001U (en) | 2012-02-22 | 2012-02-22 | Differential mode choking coil magnetic core for light-emitting diode (LED) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202513001U true CN202513001U (en) | 2012-10-31 |
Family
ID=47065465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200569184U Expired - Fee Related CN202513001U (en) | 2012-02-22 | 2012-02-22 | Differential mode choking coil magnetic core for light-emitting diode (LED) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202513001U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102543376A (en) * | 2012-02-22 | 2012-07-04 | 临沂中瑞电子有限公司 | Differential-mode choking coil magnetic core for LEDs |
-
2012
- 2012-02-22 CN CN2012200569184U patent/CN202513001U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102543376A (en) * | 2012-02-22 | 2012-07-04 | 临沂中瑞电子有限公司 | Differential-mode choking coil magnetic core for LEDs |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121031 Termination date: 20180222 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |