CN205810511U - A kind of common mode inductance - Google Patents
A kind of common mode inductance Download PDFInfo
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- CN205810511U CN205810511U CN201620782058.0U CN201620782058U CN205810511U CN 205810511 U CN205810511 U CN 205810511U CN 201620782058 U CN201620782058 U CN 201620782058U CN 205810511 U CN205810511 U CN 205810511U
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- common mode
- mode inductance
- magnetic core
- winding coil
- upper rack
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Abstract
This utility model is applicable to electrical equipment technical field, provide a kind of common mode inductance, including magnetic core and winding coil, magnetic core includes upper rack posts and the lower fulcrum bar be arrangeding in parallel, two wrapping posts being parallel to each other it are connected with respectively between upper rack posts and lower fulcrum bar, being wound around winding coil on two wrapping posts respectively, the number of turn of two groups of winding coils, phase place are identical, in opposite direction.Common mode inductance of the present utility model, by coil winding on " mouth " shaped magnetic core, and coil selection flat copper wire, effectively raise the window utilization rate of magnetic core, under the size of equal size, effectively raise product power, and reduce package dimension, realize miniaturization and the flattening of finished product, applied widely, can promote the use of in various miniaturized electronics.
Description
Technical field
This utility model belongs to electrical equipment technical field, particularly relates to a kind of common mode inductance.
Background technology
EMI (Electro Magnetic Interference, electromagnetic interference) refers to be mixed with various high-frequency circuit, number
The phenomenon that a large amount of frequency electromagnetic waves that the mainboard of word circuit and analog circuit operationally can produce interfere with each other.EMI not only can
Affect the normal work of electronic equipment, also can be connected up by mainboard or external cable is outwards launched, cause electromagnetic radiation pollution, right
Human body is harmful to.
Common mode inductance (Common mode Chok), is also common mode choke, is usually used in the Switching Power Supply of electronic equipment,
For filtering the electromagnetic interference signal of common mode.Common mode inductance commonly used in the prior art, usually by two numbers of turn and phase place phase
The coil winding same, coiling is in opposite direction is on same iron core, so, when the normal current in circuit flows through common mode inductance,
Electric current produces reverse magnetic field in the inductance coil of same phase coiling and cancels out each other；When there being common mode current flowing through coil,
Due to the same tropism of common mode current, magnetic field in the same direction can be produced in coil and increase the induction reactance of coil, make coil show as height
Impedance, produces stronger damping, with this attenuation common-mode electric current, reaches the purpose of filtering.
But, common mode inductance of the prior art is the highest, and size is relatively big, uses on miniaturized electronics
Time, it is difficult to the meeting avoided makes equipment size increase, it is difficult to meet the requirement of miniaturization.
Utility model content
This utility model provides a kind of common mode inductance, it is intended to by improving inner core and coil, effectively improve magnetic
The window utilization rate of core, reduces package area, it is achieved the miniaturization of finished product and flattening.
This utility model is achieved in that a kind of common mode inductance, and including magnetic core and winding coil, magnetic core includes parallel setting
The upper rack posts put and lower fulcrum bar, be connected with two wrapping posts being parallel to each other between upper rack posts and lower fulcrum bar respectively,
Being wound around winding coil on two wrapping posts respectively, the number of turn of two groups of winding coils, phase place are identical, in opposite direction.
Preferably, wrapping post end with upper rack posts and lower fulcrum bar respectively is connected, upper rack posts, lower fulcrum bar and two coilings
Post collectively constitutes the annular of closing.
Preferably, the cross section of wrapping post is circular.
Preferably, winding coil is flat copper wire winding coil.
Preferably, common mode inductance of the present utility model also includes that base, magnetic core and winding coil may be contained within base.
Preferably, the outside corresponding to winding coil on base is provided with occlusion part.
This utility model provides a kind of common mode inductance, and including magnetic core and winding coil, it is upper that magnetic core includes be arrangeding in parallel
Pole and lower fulcrum bar, be connected with two wrapping posts being parallel to each other between upper rack posts and lower fulcrum bar respectively, two around
Being wound around winding coil on terminal respectively, the number of turn of two groups of winding coils, phase place are identical, in opposite direction.By coil winding at " mouth "
On shaped magnetic core, and flat copper wire selected by coil, effectively raises the window utilization rate of magnetic core, in the size of equal size
Under, effectively raise product power, and reduce package dimension, it is achieved the miniaturization of finished product and flattening, applied widely,
Can promote the use of in various miniaturized electronics.
Accompanying drawing explanation
Fig. 1 is the structural representation of the common mode inductance that this utility model provides；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is the right view of Fig. 1.
Reference:
1-magnetic core；11-upper rack posts；12-lower fulcrum bar；13-wrapping post；2-winding coil；3-base；4-occlusion part.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.Should be appreciated that specific embodiment described herein is only in order to explain
This utility model, is not used to limit this utility model.
This utility model provides a kind of common mode inductance, as it is shown in figure 1, include magnetic core 1 and winding coil 2, as in figure 2 it is shown,
Magnetic core 1 includes upper rack posts 11 and the lower fulcrum bar 12 be arrangeding in parallel, is connected with respectively between upper rack posts 11 and lower fulcrum bar 12
Two wrapping posts being parallel to each other 13, are wound around winding coil 2 on two wrapping posts 13 respectively, the number of turn of two groups of winding coils 2,
Phase place is identical, in opposite direction.
Two groups of numbers of turn, phase place are identical, and winding coil 2 in opposite direction, rotating around on the wrapping post 13 of the left and right sides, makes
The two groups of magnetic circuits obtaining common mode inductance of the present utility model are symmetrical.
So, when the normal current in circuit flows through common mode inductance, electric current is at the winding coil 2 of same phase coiling
In due to galvanomagnetic-effect produce reverse magnetic field and cancel out each other.Flow through rotating around the coiling in the left and right sides when there being common mode current
During post 13, owing to common mode current has same tropism, magnetic field in the same direction can be produced in the winding coil 2 of both sides and increase winding line
The induction reactance of circle 2, makes winding coil 2 show as high impedance, produces stronger damping, with this attenuation common-mode electric current, reaches filter
The purpose of ripple.
This utility model provides a kind of common mode inductance, and including magnetic core and winding coil, it is upper that magnetic core includes be arrangeding in parallel
Pole and lower fulcrum bar, be connected with two wrapping posts being parallel to each other between upper rack posts and lower fulcrum bar respectively, two around
Being wound around winding coil on terminal respectively, the number of turn of two groups of winding coils, phase place are identical, in opposite direction.By coil winding at " mouth "
On shaped magnetic core, and flat copper wire selected by coil, effectively raises the window utilization rate of magnetic core, in the size of equal size
Under, effectively raise product power, and reduce package dimension, it is achieved the miniaturization of finished product and flattening, applied widely,
Can promote the use of in various miniaturized electronics.
Preferably, as in figure 2 it is shown, the wrapping post 13 of magnetic core 1 both sides respectively with the end of upper rack posts 11 and lower fulcrum bar 12 even
Connecing, upper rack posts 11, lower fulcrum bar 12 and two wrapping posts 13 collectively constitute the annular of closing.
The magnetic core 1 of closed ring structure, enable common mode inductance to obtain dimensional structure and be fully used, it is to avoid composition magnetic core
Upper rack posts 11, lower fulcrum bar 12 or the wrapping post 13 of 1 increases the package dimension of whole device in junction beyond size.
Additionally, put forward high-power situation for needs, can be by extending the length of wrapping post 13, to increase winding coil
The winding number of turn of 2, under equal package dimension, improves and uses power.
Or, it is also possible to according to the internal structure of the product of required installation common mode inductance, adjust the size of magnetic core 1 with big
Little.
Preferably, the cross section of wrapping post 13 is circular.
Cross section is circular wrapping post 13, it is possible to make to be wrapped between winding coil 2 thereon and wrapping post 13
Contact area is maximum, and the wrapping post 13 of circle also allows for the coiling of winding coil 2.
Further, winding coil 2 is flat copper wire winding coil 2.
Use flat copper wire as winding coil 2, be the winding coil 2 that circular copper cash makes relative to cross section, in phase
In same coiling length, it is possible to increase the coiling number of turn, and then make in equal package dimension, it is possible to effective raising common mode electricity
The use power of sense, or, under identical power conditions, it is possible to effectively reduce the package dimension of common mode inductance.
Additionally, on the basis of wrapping post 13 is cylindrical wrapping post 13, so that common mode inductance is placed at work
Stable, and be prone to install with the combination of other devices, the upper rack posts 11 of magnetic core 1 upper end and the lower fulcrum bar 12 of lower end are all processed as transversal
Face is the quadrangular of rectangle, so, even if wrapping post 13 is cylindrical, it is also possible to by upper rack posts 11 He of four prism type
Lower fulcrum bar 12 is placed stable, it is to avoid due to external environment rock or other influences causes common mode inductance shake occurs or rocks.
And, for being arranged on inside other devices for realizing filtering the common mode inductance of purpose, when other devices are internally installed, four
The stable displacement structure of the magnetic core 1 that prismatic upper rack posts 11 and lower fulcrum bar 12 are formed, also easily facilitate with miscellaneous part it
Between connection install.
Further, as it is shown on figure 3, common mode inductance of the present utility model also includes that base 3, magnetic core 1 and winding coil 2 are equal
It is arranged on base 3.
Base 3 generally uses insulant to make, and the shape of base 3 is not specifically limited at this, it is common that in order to coordinate
The interiors of products structure installing common mode inductance of the present utility model carries out the design of shape and connected mode, so that magnetic core 1
Arrange on the base 3 with winding coil 2, and convenient on product by draw-in groove or other connection members of processing on base 3
Fixed installation.
On this basis, as it is shown on figure 3, the edge of base 3 is additionally provided with the occlusion part for producing magnetic field shielding effect
4, this occlusion part 4 can use soft magnetic material, or magnetic powder is processed as the making of flexible glue shape.
Block effect by occlusion part 4, it is possible to by the magnetic field shielding of common mode inductance in inside, reduce common mode inductance to it
The interference effect of other peripheral circuits in the product installed.
Common mode inductance of the present utility model, it is possible to the effective window utilization rate improving magnetic core, wanting in product flattening
Ask down, reduce the height dimension of common mode inductance so that the common mode inductance being installed in product also tends to flattening and miniaturization, subtracts
The little package dimension of whole product.
The wrapping post 13 of upper rack posts 11, lower fulcrum bar 12 and both sides is formed " mouth " shaped magnetic core 1, compared to common circle
Toroidal core, product height reduction 30%, package area reduces 60%, more can be applicable to the electronic equipment of miniaturized flat
In.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all at this
Any amendment, equivalent and the improvement etc. made within the spirit of utility model and principle, should be included in this utility model
Protection domain within.
Claims (7)
1. a common mode inductance, including magnetic core and winding coil, it is characterised in that described magnetic core includes the upper rack posts be arrangeding in parallel
And lower fulcrum bar, between described upper rack posts and described lower fulcrum bar, it is connected with two wrapping posts being parallel to each other respectively, in institute
Stating and be wound around described winding coil on two wrapping posts respectively, the number of turn of winding coil described in two groups, phase place are identical, in opposite direction.
2. common mode inductance as claimed in claim 1, it is characterised in that described wrapping post respectively with described upper rack posts and described under
The end of pole connects, and described upper rack posts, described lower fulcrum bar and described two wrapping posts collectively constitute the annular of closing.
3. common mode inductance as claimed in claim 2, it is characterised in that the cross section of described wrapping post is circular.
4. common mode inductance as claimed in claim 2, it is characterised in that the cross section of described upper rack posts and described lower fulcrum bar is square
Shape.
5. common mode inductance as claimed in claim 1, it is characterised in that described winding coil is flat copper wire winding coil.
6. common mode inductance as claimed in claim 1, it is characterised in that also include that base, magnetic core and winding coil may be contained within
On base.
7. common mode inductance as claimed in claim 6, it is characterised in that corresponding to outside described winding coil on described base
Side is provided with occlusion part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620782058.0U CN205810511U (en) | 2016-07-22 | 2016-07-22 | A kind of common mode inductance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620782058.0U CN205810511U (en) | 2016-07-22 | 2016-07-22 | A kind of common mode inductance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205810511U true CN205810511U (en) | 2016-12-14 |
Family
ID=57509403
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620782058.0U Active CN205810511U (en) | 2016-07-22 | 2016-07-22 | A kind of common mode inductance |
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| Country | Link |
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| CN (1) | CN205810511U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107612307A (en) * | 2017-10-19 | 2018-01-19 | 青岛海信日立空调***有限公司 | A kind of wave filter, power circuit and air conditioner |
| CN108335866A (en) * | 2018-04-26 | 2018-07-27 | 临安和顺磁通电子有限公司 | Day I magnetic cores and its processing technology |
-
2016
- 2016-07-22 CN CN201620782058.0U patent/CN205810511U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107612307A (en) * | 2017-10-19 | 2018-01-19 | 青岛海信日立空调***有限公司 | A kind of wave filter, power circuit and air conditioner |
| CN107612307B (en) * | 2017-10-19 | 2019-09-10 | 青岛海信日立空调***有限公司 | A kind of filter, power circuit and air conditioner |
| CN108335866A (en) * | 2018-04-26 | 2018-07-27 | 临安和顺磁通电子有限公司 | Day I magnetic cores and its processing technology |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |