CN103680852A - Iron core for differential mode choke coil - Google Patents
Iron core for differential mode choke coil Download PDFInfo
- Publication number
- CN103680852A CN103680852A CN201210339673.0A CN201210339673A CN103680852A CN 103680852 A CN103680852 A CN 103680852A CN 201210339673 A CN201210339673 A CN 201210339673A CN 103680852 A CN103680852 A CN 103680852A
- Authority
- CN
- China
- Prior art keywords
- choke coil
- differential mode
- mode choke
- iron core
- direct current
- 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 a differential mode choke coil. The iron core comprises two U-shaped iron core bodies (1), two magnetized cuboid permanent magnetic ferrite pieces (2) and (2') are placed between the two joint surfaces of the two U-shaped iron core bodies, wherein the two joint surfaces of the two U-shaped iron core bodies are in butt joint. The directions of magnetic fields generated by the two permanent magnetic ferrite pieces in the two U-shaped iron core bodies are consistent with each other, and the directions of the magnetic fields generated by the two permanent magnetic ferrite pieces are opposite to the direction of the magnetic field generated by a direct current in a differential mode choke coil winding. Because part of the magnetic field generated by the direct current in the differential mode choke coil winding is counteracted by the magnetic fields generated by the permanent magnetic ferrite pieces, a larger direct current can pass through the differential mode choke coil winding. With the method, the direct current bias characteristic of the differential mode choke coil can be greatly improved, and a larger direct current can be allowed to pass through the differential mode choke coil.
Description
Technical field
The present invention relates to a kind of iron core, relate in particular to a kind of differential mode choke coil with unshakable in one's determination.
Background technology
At present, in high-frequency circuit, generally use unshakable in one's determination as differential mode choke coil, develop rapidly along with electronic 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 electronic 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 two faying faces that mutually dock of the U-iron heart, respectively put a rectangular-shaped permanent-magnet ferrite sheet having magnetized, the magnetic direction that these two permanent-magnet ferrite sheets produce in two U-iron interior portion of docking is consistent, and the magnetic direction that its magnetic direction producing produces with direct current in Transformer Winding is contrary.
The invention has the beneficial effects as follows: the magnetic direction that the magnetic direction producing in two U-iron interior portion of docking due to these two permanent-magnet ferrite sheets produces with direct current in Transformer Winding is contrary, 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 and two permanent-magnet ferrite sheets are combined into core construction schematic diagram.
Embodiment
In Fig. 1, two U-iron hearts 1, between its two faying faces that mutually dock, be placed with two rectangular-shaped permanent-magnet ferrite sheets 2 and 2 that magnetized ', the magnetic direction that these two permanent-magnet ferrite sheets produce in the heart at two U-irons is consistent, and the magnetic direction that its magnetic direction producing produces with direct current in Transformer Winding is contrary.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 differential mode choke coil, with unshakable in one's determination, is characterized in that: comprise two U-iron hearts (1), between its two faying faces that mutually dock, be placed with two rectangular-shaped permanent-magnet ferrite sheets (2) and (2 that magnetized
'), the magnetic direction that these two permanent-magnet ferrite sheets produce in the heart at two U-irons is consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210339673.0A CN103680852A (en) | 2012-09-14 | 2012-09-14 | Iron core for differential mode choke coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210339673.0A CN103680852A (en) | 2012-09-14 | 2012-09-14 | Iron core for differential mode choke coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103680852A true CN103680852A (en) | 2014-03-26 |
Family
ID=50318120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210339673.0A Pending CN103680852A (en) | 2012-09-14 | 2012-09-14 | Iron core for differential mode choke coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103680852A (en) |
-
2012
- 2012-09-14 CN CN201210339673.0A patent/CN103680852A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10128036B2 (en) | AC permanent magnet gain transformer device and its voltage regulation and control method | |
| CN202049838U (en) | Ferrite core for differential mode choking coil | |
| CN102610370A (en) | Composite soft magnetic core for resisting electromagnetic interference | |
| KR20150089948A (en) | Reactor | |
| CN202067636U (en) | Ferrite magnetic core for transformer | |
| CN103065773B (en) | The switching mode power supply transformer of low noise and low noise Switching Power Supply | |
| CN202221696U (en) | Embedded rotary electromagnetic coupler | |
| CN102306539A (en) | Ferrite magnetic core for differential mode choke coil | |
| CN202363214U (en) | Magnetic core for transformer | |
| CN103680836A (en) | Iron core for LED differential mode choke | |
| CN103680852A (en) | Iron core for differential mode choke coil | |
| CN102306534A (en) | Ferrite magnetic core for transformer | |
| CN202049839U (en) | Ferrite core | |
| CN202049842U (en) | Ferrite core for high-frequency choke coil | |
| CN202443827U (en) | Novel transformer | |
| CN103680835A (en) | Iron core for transformer | |
| CN202513000U (en) | Magnetic core of high-frequency choke coil for light-emitting diode (LED) | |
| CN202513001U (en) | Differential mode choking coil magnetic core for light-emitting diode (LED) | |
| CN202049840U (en) | Ferrite core for fixing inductor | |
| CN102543376A (en) | Differential-mode choking coil magnetic core for LEDs | |
| CN202513002U (en) | Transformer core for LEDs (light-emitting diode) | |
| CN202049841U (en) | Ferrite core for high-frequency transformer | |
| CN102306536A (en) | Ferrite magnetic core | |
| CN202512999U (en) | Fixed inductor core used for LED drive circuit | |
| CN103680838A (en) | Iron core for LED high-frequency choke |
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 |