CN103680838A - Iron core for LED high-frequency choke - Google Patents
Iron core for LED high-frequency choke Download PDFInfo
- Publication number
- CN103680838A CN103680838A CN201210339751.7A CN201210339751A CN103680838A CN 103680838 A CN103680838 A CN 103680838A CN 201210339751 A CN201210339751 A CN 201210339751A CN 103680838 A CN103680838 A CN 103680838A
- Authority
- CN
- China
- Prior art keywords
- iron core
- frequency choke
- high frequency
- choke coil
- magnetized
- 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.)
- Pending
Links
Abstract
The invention discloses an iron core for an LED high-frequency choke. The iron core is characterized by comprising two U-shaped iron core bodies (1), a bar iron core body (2), a magnetized cuboid-shaped permanent magnetic ferrite magnet (3), a magnetized cuboid-shaped permanent magnetic ferrite magnet (4), a magnetized cuboid-shaped permanent magnetic ferrite magnet (5) and a magnetized cuboid-shaped permanent magnetic ferrite magnet (6). The directions of the magnetic fields generated in the bar iron core body by the four permanent magnetic ferrite magnets are the same as and opposite to the direction of the magnetic field generated by direct currents in a choke winding on the bar iron core body.
Description
Technical field
The present invention relates to a kind of iron core, relate in particular to a kind of LED high frequency choke coil with unshakable in one's determination.
Background technology
At present, in LED drive circuit, generally use unshakable in one's determination as high frequency choke coil, develop rapidly along with LED electronic technology, require electronic devices and components constantly to miniaturization and high power future development, in order to meet this growth requirement, require high frequency choke coil to allow the direct current that passes through increasing, and this tends to cause the significantly decline of high frequency choke coil winding inductance, thereby high frequency choke coil cannot normally be worked.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 of air gap, or simply make iron core become open-flux path, although this method can be improved the DC superposition characteristic of high frequency choke coil to a certain extent, but improved degree is very limited, especially for the iron core being operated under high frequency condition, often adopt NiZn Ferrite Material, and NiZn Ferrite Material is because saturation flux density is lower, be easy to occur saturation magnetization, thereby choke winding inductance is sharply declined, this can make electronic equipment normally work, even burn.Therefore, for being operated in the high frequency choke coil with larger direct-current component, only adopt open-flux path, can't greatly improve the DC superposition characteristic of high frequency choke coil.
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 iron core for high frequency choke coil for electronic circuit 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 and a bar shaped magnetic core, between bar shaped magnetic core and the interface of two U-shaped magnetic cores, each places a cuboid ferrimagnet having magnetized, the magnetic direction that these four permanent-magnet ferrite magnets produce in bar shaped magnetic core is identical, but the magnetic direction producing with direct current in choke winding on bar shaped magnetic core is contrary.
The invention has the beneficial effects as follows: the magnetic direction producing in bar shaped magnetic core due to these four permanent-magnet ferrite magnets is identical, and the magnetic direction producing with direct current in choke winding on bar shaped magnetic core is contrary.Offset in some magnetic field being produced by permanent-magnet ferrite magnet, the magnetic field that in high frequency choke coil winding, direct current produces, thereby can make in high frequency choke coil winding by larger direct current.By the inventive method, can greatly improve the DC superposition characteristic of high frequency choke coil, high frequency 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 high frequency choke coil core construction schematic diagram.
Embodiment
In Fig. 1, comprise two U-iron hearts 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 bar shaped magnetic core is identical, and the magnetic direction producing with direct current in choke winding on bar shaped magnetic core is contrary.Because offset in some magnetic field being produced by permanent-magnet ferrite magnet, magnetic field that in high frequency choke coil winding, direct current produces, thereby can make can pass through larger direct current in high frequency choke coil winding.By the inventive method, can greatly improve the DC superposition characteristic of high frequency choke coil, high frequency choke coil can be allowed by larger direct current.
Claims (1)
1. a LED high frequency choke coil is with unshakable in one's determination, it is characterized in that: comprise two U-iron hearts (1), a upright 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 upright core is identical, and the magnetic direction producing with direct current in choke winding on upright core is contrary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210339751.7A CN103680838A (en) | 2012-09-13 | 2012-09-13 | Iron core for LED high-frequency choke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210339751.7A CN103680838A (en) | 2012-09-13 | 2012-09-13 | Iron core for LED high-frequency choke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103680838A true CN103680838A (en) | 2014-03-26 |
Family
ID=50318109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210339751.7A Pending CN103680838A (en) | 2012-09-13 | 2012-09-13 | Iron core for LED high-frequency choke |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103680838A (en) |
-
2012
- 2012-09-13 CN CN201210339751.7A patent/CN103680838A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| PH12018500722A1 (en) | Structures and methods for controlling losses in printed circuit boards | |
| US10128036B2 (en) | AC permanent magnet gain transformer device and its voltage regulation and control method | |
| CN103578688A (en) | Inductance element provided with permanent magnet bias magnet and bypass magnetic core | |
| CN202049838U (en) | Ferrite core for differential mode choking coil | |
| CN202513000U (en) | Magnetic core of high-frequency choke coil for light-emitting diode (LED) | |
| CN202067636U (en) | Ferrite magnetic core for transformer | |
| CN100369166C (en) | Convergent oscillation type demagnetization device | |
| WO2015184793A1 (en) | Permanent magnet power-increasing transformer | |
| CN202049839U (en) | Ferrite core | |
| CN202049842U (en) | Ferrite core for high-frequency choke coil | |
| CN102306539A (en) | Ferrite magnetic core for differential mode choke coil | |
| CN103680838A (en) | Iron core for LED high-frequency choke | |
| CN102306536A (en) | Ferrite magnetic core | |
| CN202049840U (en) | Ferrite core for fixing inductor | |
| CN202513001U (en) | Differential mode choking coil magnetic core for light-emitting diode (LED) | |
| CN103680836A (en) | Iron core for LED differential mode choke | |
| CN202512999U (en) | Fixed inductor core used for LED drive circuit | |
| CN102306534A (en) | Ferrite magnetic core for transformer | |
| CN202443827U (en) | Novel transformer | |
| CN202049841U (en) | Ferrite core for high-frequency transformer | |
| CN202513002U (en) | Transformer core for LEDs (light-emitting diode) | |
| CN103680837A (en) | Iron core for LED fixed inductor | |
| CN102543377A (en) | High-frequency choking coil magnetic core for LEDs | |
| CN202363214U (en) | Magnetic core for transformer | |
| CN102543376A (en) | Differential-mode choking coil magnetic core for LEDs |
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 |