CN103680836A - Iron core for LED differential mode choke - Google Patents
Iron core for LED differential mode choke Download PDFInfo
- Publication number
- CN103680836A CN103680836A CN201210339041.4A CN201210339041A CN103680836A CN 103680836 A CN103680836 A CN 103680836A CN 201210339041 A CN201210339041 A CN 201210339041A CN 103680836 A CN103680836 A CN 103680836A
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- China
- Prior art keywords
- differential mode
- mode choke
- iron core
- choke coil
- led
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Abstract
The invention discloses an iron core for an LED differential mode choke. The iron core comprises two U-shaped iron core bodies (1), a magnetized cuboid-shaped permanent magnetic ferrite magnet is arranged between one mutually butted surfaces of the U-shaped iron core bodies, and the direction of the magnetic field generated in the two U-shaped iron core bodies by the permanent magnetic ferrite magnet is opposite to the direction of the magnetic field generated by direct currents in a differential mode choke winding.
Description
Technical field
The present invention relates to a kind of iron core, relate in particular to a kind of LED differential mode choke coil with unshakable in one's determination.
Background technology
At present, in LED drive circuit, generally use unshakable in one's determination as differential mode choke coil, develop rapidly along with LED technology, require electronic devices and components constantly to miniaturization and high power future development, in order to meet this growth requirement, require differential mode choke coil to allow the direct current that passes through increasing, and this tends to cause the significantly decline of differential mode choke coil winding inductance, thereby differential mode choke coil cannot normally be worked.For preventing the generation of magnetic saturation phenomenon, must improve the DC superposition characteristic of differential mode choke coil, traditional method is in the magnetic circuit of magnetic core, to open one section of air gap, although this method can be improved the DC superposition characteristic of differential mode choke coil to a certain extent, improved degree is very limited.For being operated in the differential mode choke coil with larger direct-current component, cannot adopt in this way, because, air gap in iron circuit, can not open very greatly, otherwise, inductance is very low, and leakage field is very large, to other electronic devices and components, can produce certain electromagnetic interference.
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiencies in the prior art, and a kind of LED drive circuit differential mode choke coil that can be applied to have larger direct-current component is provided.
The technical solution adopted in the present invention is: the present invention includes two U-iron hearts of docking mutually, between the interface of one of them docking of the U-iron heart, place a rectangular-shaped permanent-magnet ferrite magnet having magnetized, the magnetic direction that this permanent-magnet ferrite magnet produces in two U-iron interior portion of docking is identical, and its magnetic direction producing is contrary with the magnetic direction that direct current in Transformer Winding produces.
The invention has the beneficial effects as follows: the magnetic direction producing in two U-iron interior portion of docking due to this permanent-magnet ferrite magnet is contrary with the magnetic direction that direct current in Transformer Winding produces, therefore, offset in some magnetic field being produced by permanent magnetism iron core, the magnetic field that in differential mode choke coil winding, direct current produces, thereby can make in differential mode choke coil winding by larger direct current.By the inventive method, can greatly improve the DC superposition characteristic of differential mode choke coil, differential mode choke coil can be allowed by larger direct current.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is that two U-iron hearts become core construction schematic diagram with permanent-magnet ferrite magnet combination.
Embodiment
In Fig. 1, two U-iron hearts 1, between its interface mutually docking, be placed with a rectangular-shaped permanent-magnet ferrite magnet 2 having magnetized, the magnetic direction that this permanent-magnet ferrite magnet produces in the heart at two U-irons is identical, and its magnetic direction producing is contrary with the magnetic direction that direct current in Transformer Winding produces.
Advantage of the present invention is: because offset in some magnetic field being produced by permanent-magnet ferrite sheet, magnetic field that in differential mode choke coil winding, direct current produces, thereby can make in differential mode choke coil winding by larger direct current.By the inventive method, can greatly improve the DC superposition characteristic of differential mode choke coil, differential mode choke coil can be allowed by larger direct current.
Claims (1)
1. a LED differential mode choke coil is with unshakable in one's determination, it is characterized in that: comprise two U-iron hearts (1), between its interface mutually docking, place a rectangular-shaped permanent-magnet ferrite magnet (2) having magnetized, the magnetic direction that this permanent-magnet ferrite magnet produces in the heart at two U-irons is contrary with the magnetic direction that direct current in differential mode choke coil winding produces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210339041.4A CN103680836A (en) | 2012-09-13 | 2012-09-13 | Iron core for LED differential mode choke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210339041.4A CN103680836A (en) | 2012-09-13 | 2012-09-13 | Iron core for LED differential mode choke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103680836A true CN103680836A (en) | 2014-03-26 |
Family
ID=50318107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210339041.4A Pending CN103680836A (en) | 2012-09-13 | 2012-09-13 | Iron core for LED differential mode choke |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103680836A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107068505A (en) * | 2017-02-14 | 2017-08-18 | 张文红 | A kind of current coil for oil damping hydraulic-electromagnetic tripping mechanism |
-
2012
- 2012-09-13 CN CN201210339041.4A patent/CN103680836A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107068505A (en) * | 2017-02-14 | 2017-08-18 | 张文红 | A kind of current coil for oil damping hydraulic-electromagnetic tripping mechanism |
| CN107068505B (en) * | 2017-02-14 | 2020-03-24 | 张文红 | Current coil for oil damping hydraulic electromagnetic tripping mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140326 |