CN102543375A - Transformer magnetic core for LEDs - Google Patents
Transformer magnetic core for LEDs Download PDFInfo
- Publication number
- CN102543375A CN102543375A CN2012100396993A CN201210039699A CN102543375A CN 102543375 A CN102543375 A CN 102543375A CN 2012100396993 A CN2012100396993 A CN 2012100396993A CN 201210039699 A CN201210039699 A CN 201210039699A CN 102543375 A CN102543375 A CN 102543375A
- Authority
- CN
- China
- Prior art keywords
- magnetic
- transformer
- ferrite
- direct current
- permanent
- 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
Images
Abstract
The invention discloses a transformer magnetic core for LEDs, which comprises two E-shaped ferrite magnetic cores (1). Two magnetized rectangular permanent-magnetic ferrite magnets (2 and 3) are disposed between the combined sides of two butted side legs of each E-shaped ferrite magnetic core, the directions of magnetic fields generated in center columns of the two E-shaped magnetic cores by the two permanent-magnetic ferrite magnets are identical and are opposite to the direction of the magnetic field generated by direct current in windings of the center columns. Since the magnetic field generated by the direct current in the windings of the center columns is partially offset by the magnetic fields generated by the permanent-magnetic ferrite magnets, the direct-current overlapping performance of a transformer can be improved greatly by the transformer magnetic core, and higher direct current can be allowed to pass the transformer.
Description
Technical field
The present invention relates to a kind of ferrite core, relate in particular to a kind of LED and use the transformer magnetic core.
Background technology
At present; Generally use ferrite core as transformer in the LED power driving 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 transformer to allow to pass through is increasing, and this tends to cause the decline significantly of Transformer Winding inductance, thereby makes the transformer can't operate as normal.For preventing the generation of magnetic saturation phenomenon; Must improve the dc superposition characteristic of transformer; 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 transformer to a certain extent, improved degree is very limited.For being operated in transformer 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 power driving circuit that can be applied to have than big direct-current component to use transformer.
The technical scheme that the present invention adopted is: the present invention includes two ferrite 'E' cores of butt joint each other, two limit legs of E shape magnetic core respectively grind off a part; Perhaps E shape magnetic core is when mould designs, and makes the height of both sides leg be lower than the height of newel, adopts this mode, saved mill processing, can save cost greatly.When two E shape magnetic core butt joints; Between two limit leg interfaces of E shape magnetic core, respectively place a rectangular-shaped permanent-magnet ferrite magnet that has magnetized; The magnetic direction that these two permanent-magnet ferrite magnets produce in the newel of two ferrite 'E' cores of butt joint is identical, and the magnetic direction that direct current produced in magnetic direction that it produced and the newel winding is opposite.
The invention has the beneficial effects as follows: because the magnetic direction that direct current produced in magnetic direction that these two permanent-magnet ferrite magnets produce in two ferrite 'E' core newels of butt joint and the newel winding is opposite; Therefore; Some is offset the magnetic field that direct current produced in the newel winding by the magnetic field that the permanent-magnet ferrite sheet is produced, thereby can make in the Transformer Winding through bigger direct current.Through the inventive method, can improve the dc superposition characteristic of transformer greatly, transformer 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 E shape magnetic cores and two permanent-magnet ferrite sheets are combined into the ferrite core structural representation.
Embodiment
In Fig. 1; Two ferrite 'E' cores 1; Between the interface of two limit legs that it docks each other; Each places a rectangular-shaped permanent- magnet ferrite magnet 2 and 3 that has magnetized, and the magnetic direction that these two permanent-magnet ferrite magnets are produced in two ferrite 'E' core newels is identical, and the magnetic direction that direct current produced in magnetic direction that it produced and the newel winding is opposite.Because some is offset the magnetic field that direct current produced in the newel winding by the magnetic field that the permanent-magnet ferrite sheet is produced, thereby can make in the newel winding through bigger direct current.Through the inventive method, can improve the dc superposition characteristic of transformer greatly, transformer can be allowed through bigger direct current.
Claims (1)
1. a LED uses the transformer magnetic core; It is characterized in that: comprise two ferrite 'E' cores (1); Between its two faying faces that dock each other; Be placed with two rectangular-shaped permanent-magnet ferrite sheet (2) and (3) of having magnetized, the magnetic direction that these two permanent-magnet ferrite sheets produce in two ferrite 'E' core newels is identical, and the magnetic direction that direct current produced in magnetic direction that it produced and the newel winding is opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100396993A CN102543375A (en) | 2012-02-22 | 2012-02-22 | Transformer magnetic core for LEDs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100396993A CN102543375A (en) | 2012-02-22 | 2012-02-22 | Transformer magnetic core for LEDs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102543375A true CN102543375A (en) | 2012-07-04 |
Family
ID=46350037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100396993A Pending CN102543375A (en) | 2012-02-22 | 2012-02-22 | Transformer magnetic core for LEDs |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102543375A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1343994A (en) * | 2000-09-08 | 2002-04-10 | 株式会社东金 | Inductance componnet having permanent-magnet for applicating magnetic deflection outside of exciting coil |
| JP2002222707A (en) * | 2001-01-26 | 2002-08-09 | Nec Tokin Corp | Inductance component |
| CN1363939A (en) * | 2000-10-25 | 2002-08-14 | 株式会社东金 | Magnet core with magnetic deflecting body and inductor therewith |
| CN202049838U (en) * | 2011-05-20 | 2011-11-23 | 张家港市众力磁业有限公司 | Ferrite core for differential mode choking coil |
| CN202513002U (en) * | 2012-02-22 | 2012-10-31 | 临沂中瑞电子有限公司 | Transformer core for LEDs (light-emitting diode) |
-
2012
- 2012-02-22 CN CN2012100396993A patent/CN102543375A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1343994A (en) * | 2000-09-08 | 2002-04-10 | 株式会社东金 | Inductance componnet having permanent-magnet for applicating magnetic deflection outside of exciting coil |
| CN1363939A (en) * | 2000-10-25 | 2002-08-14 | 株式会社东金 | Magnet core with magnetic deflecting body and inductor therewith |
| JP2002222707A (en) * | 2001-01-26 | 2002-08-09 | Nec Tokin Corp | Inductance component |
| CN202049838U (en) * | 2011-05-20 | 2011-11-23 | 张家港市众力磁业有限公司 | Ferrite core for differential mode choking coil |
| CN202513002U (en) * | 2012-02-22 | 2012-10-31 | 临沂中瑞电子有限公司 | Transformer core for LEDs (light-emitting diode) |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10128036B2 (en) | AC permanent magnet gain transformer device and its voltage regulation and control method | |
| CN105518810A (en) | Integrated magnetic assemblies and methods of assembling same | |
| EP2071596A3 (en) | Complex inductor and power supply unit | |
| JP2007123596A (en) | Dc reactor and inverter device | |
| CN202049838U (en) | Ferrite core for differential mode choking coil | |
| CN103065773B (en) | The switching mode power supply transformer of low noise and low noise Switching Power Supply | |
| CN202067636U (en) | Ferrite magnetic core for transformer | |
| CN204480858U (en) | A kind of iron core of transformer | |
| CN104051138A (en) | Transformer | |
| CN202513002U (en) | Transformer core for LEDs (light-emitting diode) | |
| CN202363214U (en) | Magnetic core for transformer | |
| CN102306539A (en) | Ferrite magnetic core for differential mode choke coil | |
| CN202513000U (en) | Magnetic core of high-frequency choke coil for light-emitting diode (LED) | |
| CN102543375A (en) | Transformer magnetic core for LEDs | |
| CN202513001U (en) | Differential mode choking coil magnetic core for light-emitting diode (LED) | |
| CN202443827U (en) | Novel transformer | |
| CN102543376A (en) | Differential-mode choking coil magnetic core for LEDs | |
| CN202512999U (en) | Fixed inductor core used for LED drive circuit | |
| CN202049842U (en) | Ferrite core for high-frequency choke coil | |
| CN102306534A (en) | Ferrite magnetic core for transformer | |
| CN103680836A (en) | Iron core for LED differential mode choke | |
| CN202049841U (en) | Ferrite core for high-frequency transformer | |
| CN202049840U (en) | Ferrite core for fixing inductor | |
| CN102306540A (en) | Ferrite core for high-frequency transformer | |
| JP2007281204A (en) | Dc reactor |
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 |