CN202513000U - Magnetic core of high-frequency choke coil for light-emitting diode (LED) - Google Patents
Magnetic core of high-frequency choke coil for light-emitting diode (LED) Download PDFInfo
- Publication number
- CN202513000U CN202513000U CN2012200569019U CN201220056901U CN202513000U CN 202513000 U CN202513000 U CN 202513000U CN 2012200569019 U CN2012200569019 U CN 2012200569019U CN 201220056901 U CN201220056901 U CN 201220056901U CN 202513000 U CN202513000 U CN 202513000U
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- CN
- China
- Prior art keywords
- magnetic core
- choke coil
- frequency choke
- direct current
- high frequency
- 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 utility model discloses a magnetic core of a high-frequency choke coil for a light-emitting diode (LED). The magnetic core is characterized by comprising two U-shaped ferramic cores (1), a strip magnetic core (2) and four cuboid permanent magnet ferrimagnets (3), (4), (5) and (6) which are magnetized, wherein the magnetic field directions of the four permanent magnet ferrimagnets in the strip magnetic core are the same, and are opposite to the magnetic field direction of direct current in a choke coil winding on the strip magnetic core. According to the magnetic core, a magnetic field generated by the direct current in the high-frequency choke coil winding is offset by a magnetic field generated by the permanent magnet ferrimagnets partially. By the magnetic core, the direct-current superposition characteristic of the high-frequency choke coil can be improved greatly, so that heavy direct current can pass through the high-frequency choke 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 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.
The utility model content
The utility model technical problem to be solved 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 utility model adopted is: the utility model comprises 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 beneficial effect of the utility model is: 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 utility model 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 utility model is described further.
Fig. 1 is that high frequency choke coil is used the ferrite core structural representation.
Embodiment
Among 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 magnetic core is produced, and can pass through bigger direct current thereby can make in the high frequency choke coil winding.Through the utility model 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. one kind is used for LED 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 |
|---|---|---|---|
| CN2012200569019U CN202513000U (en) | 2012-02-22 | 2012-02-22 | Magnetic core of high-frequency choke coil for light-emitting diode (LED) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200569019U CN202513000U (en) | 2012-02-22 | 2012-02-22 | Magnetic core of high-frequency choke coil for light-emitting diode (LED) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202513000U true CN202513000U (en) | 2012-10-31 |
Family
ID=47065464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200569019U Expired - Fee Related CN202513000U (en) | 2012-02-22 | 2012-02-22 | Magnetic core of high-frequency choke coil for light-emitting diode (LED) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202513000U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102543377A (en) * | 2012-02-22 | 2012-07-04 | 临沂中瑞电子有限公司 | High-frequency choking coil magnetic core for LEDs |
| CN105469932A (en) * | 2016-01-19 | 2016-04-06 | 张月妹 | Direct current inductor |
-
2012
- 2012-02-22 CN CN2012200569019U patent/CN202513000U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102543377A (en) * | 2012-02-22 | 2012-07-04 | 临沂中瑞电子有限公司 | High-frequency choking coil magnetic core for LEDs |
| CN105469932A (en) * | 2016-01-19 | 2016-04-06 | 张月妹 | Direct current inductor |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121031 Termination date: 20180222 |