CN202034159U - A common mode and differential mode inductor - Google Patents
A common mode and differential mode inductor Download PDFInfo
- Publication number
- CN202034159U CN202034159U CN2011200263935U CN201120026393U CN202034159U CN 202034159 U CN202034159 U CN 202034159U CN 2011200263935 U CN2011200263935 U CN 2011200263935U CN 201120026393 U CN201120026393 U CN 201120026393U CN 202034159 U CN202034159 U CN 202034159U
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- magnetic core
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- framework
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Abstract
The utility model discloses a common mode and differential mode inductor, comprising a magnetic core, a framework, a first winding, a second winding and plug feet. The first winding and the second winding are wound around the framework; the magnetic core is disposed on the framework; the plug feet are disposed at the bottom of the framework; a magnetic core with low magnetic conductivity is disposed between the first winding and the second winding; and the magnetic core disposed on the framework is the magnetic core with high magnetic conductivity. The common mode and differential mode inductor provided by the utility model has a small volume and less elements and is light, cost-effective, space-saving, efficient and easy to manufacture.
Description
Technical field
The utility model relates to inductor, is specifically related to a kind of inductor that has common mode inductance and differential mode inductance performance simultaneously.
Background technology
Common mode inductance (Common mode Choke) also is common mode choke, is usually used in filtering in the Switching Power Supply of computer the electromagnetic interference signal of common mode.In circuit design, common mode inductance has been the effect of EMI filtering, is used to suppress the electromagnetic wave outside radiated emission that HW High Way produces.
Common mode inductance is modal in daily life to be exactly in the electronics applications, has mixed various high-frequency circuits, digital circuit and analog circuit on the circuit of electronic product inside, and their work the time can produce a large amount of frequency electromagnetic waves and interfere with each other, Here it is EMI.EMI also can outwards launch by mainboard wiring or external cable, causes electromagnetic radiation pollution, not only influences other electronic equipment operate as normal, and is also harmful.Common mode inductance is that two-wire is two-way, and differential mode inductance is unidirectional.Common mode is that two windings are connected on respectively on zero line and the live wire, and two windings are with advancing with going out, filtering be common-mode signal, differential mode is that the filter inductor that a winding is connected on separately on zero line and the live wire can only the filtering differential mode interference.
Chip on the circuit is an electromagnetic interference object in the course of the work, also is an electromagnetic interference source.Generally speaking, we can be divided into two classes to these electromagnetic interference: series mode interference (differential mode interference) and common mode disturbances (ground connection interference).With two PCB cablings on the mainboard (lead that connects each element of mainboard) is example, and so-called series mode interference refers to two interference between the cabling; Common mode disturbances then is the interference that the potential difference between two cablings and the PCB ground wire causes.The series mode interference function of current is between two signal line, and its conduction orientation is consistent with waveform and signal code; The common mode disturbances function of current is between signal line and ground wire, and disturbance current respectively flows through 1/2nd and in the same way on two signal line, and is common return with the ground wire.The common mode current that ifs circuit produces filters without decay, especially as the common mode current on USB and this high-speed interface cabling of IEEE 1394 interfaces, the common mode disturbances electric current just is easy to produce electromagnetic radiation---the common mode radiation that produces because of common mode current by the interface data line in cable so.Standard criterions such as the CISPR22 of U.S. FCC, CISPR and the GB9254 of China etc. all have relevant requirement for restriction to the common mode conducted interference of Information Technology Equipment communication port with radiated emission.For the interference signal imported on the erasure signal line and the various interference of induction, we must rationally arrange filter circuit to filter the interference of common mode and string mould, and common mode inductance and differential mode inductance all are two devices that independently separate at present.
The utility model content
The problem that the utility model need solve provides a kind of common mode differential mode inductance device of removing common mode disturbances and series mode interference influence.
To achieve these goals, the utility model is designed a kind of common mode differential mode inductance device, comprise magnetic core, skeleton, first winding, second winding and pin, first winding, second winding are respectively on skeleton, magnetic core is installed on the skeleton, described pin is separately positioned on the bottom of skeleton, is provided with the low magnetic permeability magnetic core between described first winding, second winding, and the magnetic core that is installed on the skeleton is the high magnetic permeability magnetic core.
The top of described magnetic core is equipped with the steel folder that is connected the skeleton two ends.
The utility model common mode differential mode inductance utensil has that volume is little, in light weight, personality is lacked, saved space, efficient height, manufactures simple advantage than high, element.The utility model can be eliminated because of existing common mode inductance and differential mode inductance individual devices, and institute produces common mode disturbances and series mode interference influence mutually.
Description of drawings:
Fig. 1 is the utility model common mode differential mode inductance device front view;
Fig. 2 is the upward view of Fig. 1.
Embodiment
For the ease of those skilled in the art's understanding, structural principle of the present utility model is described in further detail below in conjunction with specific embodiment and accompanying drawing:
As shown in Figure 1 and Figure 2, a kind of embodiment of common mode differential mode inductance device.It comprises magnetic core 4, skeleton 1, first winding 2, second winding 3 and pin 7, first winding 2, second winding 3 are respectively on skeleton 1, magnetic core 4 is installed on the skeleton 1, described pin 7 is separately positioned on the bottom of skeleton 1, be provided with low magnetic permeability magnetic core 5 between described first winding 2, second winding 3, the magnetic core 4 that is installed on the skeleton is the high magnetic permeability magnetic core.The top of described magnetic core 4 is equipped with the steel folder 6 that is connected skeleton 1 two ends.
The utility model has adopted the forming technique of sneaking into low Ui Ni-Zn ferrite powder and resin, and structural design of the present utility model is simply unique, the injection moulding one-shot forming.Main material of the present utility model is phenolic moulding powder and Ni-Zn ferrite powder and high magnetic conductivity ferrite material.Different sense values requires and can get final product by the magnetic permeability proportioning of magnetic core.Reduced production cost to a certain extent. have very high superiority of effectiveness.
Claims (2)
1. common mode differential mode inductance device, comprise magnetic core (4), skeleton (1), first winding (2), second winding (3) and pin (7), first winding (2), second winding (3) are respectively on skeleton (1), magnetic core (4) is installed on the skeleton (1), described pin (7) is separately positioned on the bottom of skeleton (1), it is characterized in that: be provided with low magnetic permeability magnetic core (5) between described first winding (2), second winding (3), the magnetic core (4) that is installed on the skeleton is the high magnetic permeability magnetic core.
2. common mode differential mode inductance device according to claim 1 is characterized in that: the top of described magnetic core (4) is equipped with the steel folder (6) that is connected skeleton (1) two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200263935U CN202034159U (en) | 2011-01-24 | 2011-01-24 | A common mode and differential mode inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200263935U CN202034159U (en) | 2011-01-24 | 2011-01-24 | A common mode and differential mode inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202034159U true CN202034159U (en) | 2011-11-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200263935U Expired - Fee Related CN202034159U (en) | 2011-01-24 | 2011-01-24 | A common mode and differential mode inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202034159U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103646764A (en) * | 2013-11-28 | 2014-03-19 | 宝电电子(张家港)有限公司 | Differential-mode and common-mode integrated electronic transformer |
| CN108417362A (en) * | 2018-02-27 | 2018-08-17 | 东莞市立宇电子有限公司 | A kind of difference common mode inductance |
-
2011
- 2011-01-24 CN CN2011200263935U patent/CN202034159U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103646764A (en) * | 2013-11-28 | 2014-03-19 | 宝电电子(张家港)有限公司 | Differential-mode and common-mode integrated electronic transformer |
| CN103646764B (en) * | 2013-11-28 | 2016-07-13 | 惠州市宝电通科技有限公司 | Difference common mode Integral electronic transformator |
| CN108417362A (en) * | 2018-02-27 | 2018-08-17 | 东莞市立宇电子有限公司 | A kind of difference common mode inductance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: DONGGUAN MENTECH OPTICAL + MAGNETIC CO., LTD. Free format text: FORMER NAME: DONGGUAN MENTECH INDUSTRIAL CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Dongguan City, Guangdong Province town of the 523343 row of stone temple village nine road side Wang Shajing Mingpu company Patentee after: Dongguan Mentech Optical & Magnetic Co., Ltd. Address before: Dongguan City, Guangdong Province town of the 523343 row of stone temple village nine road side Wang Shajing Mingpu company Patentee before: Dongguan Mentech Electronic Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111109 Termination date: 20190124 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |