CN103035361A - Common mode inductor - Google Patents
Common mode inductor Download PDFInfo
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- CN103035361A CN103035361A CN 201110301654 CN201110301654A CN103035361A CN 103035361 A CN103035361 A CN 103035361A CN 201110301654 CN201110301654 CN 201110301654 CN 201110301654 A CN201110301654 A CN 201110301654A CN 103035361 A CN103035361 A CN 103035361A
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- mode inductor
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Abstract
The invention relates to an inductance coil, in particular to a common mode inductor. The common mode inductor comprises a magnetic core, two coils and four terminals, wherein the two coils and the four terminals are wound on the magnetic core; the two coils are in the same size and have the same number of turns in opposite winding directions; the magnetic core is a ferrite annular magnetic core; and the coils are insulated conductors, and the coils are wound on the magnetic core in a single layer way. The common mode inductor has the advantages of low cost and convenience in installation and can be wound by a machine with high efficiency. An insulating layer is formed between the magnetic core and the coils, the winding process can be controlled better, and a higher inductance value can be achieved.
Description
Technical field
The present invention relates to a kind of inductance coil, especially a kind of common mode inductance.
Background technology
Inductance coil has the characteristic that suppresses curent change, and larger this effect of inductance is more obvious, and this effect is referred to as induction reactance to the inhibition of electric current, and the size of induction reactance is relevant with the size of the operating frequency of inductance and itself inductance.For desirable inductor models, when coil after complete, all magnetic fluxs all concentrate on coil in intracardiac.But generally loop coil can be around a full week, or coiling is not tight, can cause like this leakage of magnetic flux.Common mode inductance has two windings, and sizable gap is arranged therebetween, will produce flux leakage like this, and forms differential mode inductance.Differential mode inductance is by being consisted of around a coil on the iron core, so when the power supply that flows to coil increased, the iron core in the coil can be saturated.
Summary of the invention
The technical problem to be solved in the present invention is: based on the problems referred to above, the invention provides a kind of common mode inductance with certain differential mode interference damping capacity.
The technical solution adopted for the present invention to solve the technical problems is: a kind of common mode inductance is provided, comprise a magnetic core, two coils and four terminals on this magnetic core, described two coil dimension is identical, the number of turn is identical, the coiling opposite direction, described magnetic core is the ferrite toroidal magnetic core, described coil is insulated conductor, and individual layer is around extremely on magnetic core.
Have a layer insulating between described magnetic core and the coil, under the instantaneous overvoltage effect, puncture between the two preventing.
The invention has the beneficial effects as follows: cost of the present invention is low, can be with the efficient coiling of machine, and easy for installation; Have a layer insulating between magnetic core and the coil, technique for coiling can better be controlled, and can do higher inductance value.
Description of drawings
The present invention is further described below in conjunction with accompanying drawing embodiment.
Fig. 1 is structural representation of the present invention.
Among the figure: 1. magnetic core, 2. coil, 3. terminal.
Embodiment
The invention will be further described in conjunction with specific embodiments now, and following examples are intended to illustrate the present invention rather than limitation of the invention further.
Common mode inductance as shown in Figure 1, comprise that a magnetic core 1, two coils 2 on this magnetic core 1 and 3, two coils of four terminals are 2 measure-alike, the number of turn is identical, the coiling opposite direction, magnetic core 2 is the ferrite toroidal magnetic core, coil 2 is insulated conductor, and individual layer is around extremely on magnetic core 1.
Have a layer insulating between magnetic core 1 and the coil 2, under the instantaneous overvoltage effect, puncture between the two preventing.
During implementation, when the normal current in the circuit is flowed through common mode inductance, electric current produces reverse magnetic field and cancels out each other in the inductance coil 2 of same-phase coiling, this moment, the normal signal electric current mainly was subjected to the impact (with the damping that causes because of leakage inductance on a small quantity) of coil resistance; When flowing through the electric current that common mode disturbances is arranged in the coil 2, can coil 2 interior generations in the same way magnetic field and increase the induction reactance of coil 2, make coil 2 show as high impedance, produce stronger damping, with this attenuation common-mode electric current, reach the purpose of filtering.
In the design of filter, we also can utilize leakage inductance.As in common filter, a common mode inductance only is installed, utilize the leakage inductance of common mode inductance to produce an amount of differential mode inductance, play the inhibitory action to differential-mode current.Sometimes, also the very important person improves the differential mode inductance amount, to reach better filter effect for increasing the leakage inductance of common mode choke.
Take above-mentioned foundation desirable embodiment of the present invention as enlightenment, by above-mentioned description, the relevant staff can in the scope that does not depart from this invention technological thought, carry out various change and modification fully.The technical scope of this invention is not limited to the content on the specification, must determine its technical scope according to the claim scope.
Claims (2)
1. common mode inductance, it is characterized in that: comprise a magnetic core (1), two coils (2) and four terminals (3) on this magnetic core (1), described two coils (2) are measure-alike, the number of turn is identical, the coiling opposite direction, described magnetic core (1) is the ferrite toroidal magnetic core, described coil (2) is insulated conductor, and individual layer is around extremely on magnetic core (1).
2. common mode inductance according to claim 1 is characterized in that: have a layer insulating between described magnetic core (1) and the coil (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110301654 CN103035361A (en) | 2011-09-30 | 2011-09-30 | Common mode inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110301654 CN103035361A (en) | 2011-09-30 | 2011-09-30 | Common mode inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103035361A true CN103035361A (en) | 2013-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110301654 Pending CN103035361A (en) | 2011-09-30 | 2011-09-30 | Common mode inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103035361A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106998131A (en) * | 2017-05-19 | 2017-08-01 | 北京唐浩电力工程技术研究有限公司 | A kind of system and method for preventing fan converter IGBT from switching transient current impact |
| CN107195428A (en) * | 2017-06-27 | 2017-09-22 | 山东中瑞电子股份有限公司 | The EMI common mode inductances and its winding method of new winding |
| CN114464415A (en) * | 2022-02-23 | 2022-05-10 | 北京华芯微半导体有限公司 | Filter with sampling function and power supply filter circuit |
-
2011
- 2011-09-30 CN CN 201110301654 patent/CN103035361A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106998131A (en) * | 2017-05-19 | 2017-08-01 | 北京唐浩电力工程技术研究有限公司 | A kind of system and method for preventing fan converter IGBT from switching transient current impact |
| CN107195428A (en) * | 2017-06-27 | 2017-09-22 | 山东中瑞电子股份有限公司 | The EMI common mode inductances and its winding method of new winding |
| CN114464415A (en) * | 2022-02-23 | 2022-05-10 | 北京华芯微半导体有限公司 | Filter with sampling function and power supply filter circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | 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: 20130410 |