CN208538600U - A kind of common mode inductance - Google Patents
A kind of common mode inductance Download PDFInfo
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- CN208538600U CN208538600U CN201820768268.3U CN201820768268U CN208538600U CN 208538600 U CN208538600 U CN 208538600U CN 201820768268 U CN201820768268 U CN 201820768268U CN 208538600 U CN208538600 U CN 208538600U
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- common mode
- mode inductance
- coil
- magnetic core
- fixed
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Abstract
The utility model discloses a kind of common mode inductances to improve the saturated characteristic of common mode inductance, reduce processing cost to improve the space utilization rate and poor common mode inductance amount of common mode inductance.Common mode inductance includes: two magnetic cores, and each magnetic core includes pedestal and the center pillar and two side columns for being fixed on pedestal side, and center pillar is located between two side columns, and two core structures are symmetrical and are fixedly connected；And corresponding at least one coil being arranged on the center pillar of each magnetic core.
Description
Technical field
The utility model relates to inductive technologies fields, more particularly to a kind of common mode inductance.
Background technique
Common mode inductance is also common mode choke, is commonly used for filtering suppression common mode electromagnetic interference signal in Switching Power Supply.In board
In design, common mode inductance has been also the effect of EMI (Electro Magnetic Interference, electromagnetic interference) filtering.
Currently, conventional common mode inductance generally uses toroidal core, there is following defect in production: being on the one hand common mode
The space utilization rate of inductance is not high, and when volume is restricted, inductance is also restrained；Still further aspect is in some annulars
Although using coil automatic winding technology on magnetic core, processing cost is higher.
Utility model content
The purpose of the utility model embodiment is to provide a kind of common mode inductance, with improve common mode inductance space utilization rate and
Poor common mode inductance amount improves the saturated characteristic of common mode inductance, reduces processing cost.
The utility model embodiment provides a kind of common mode inductance, including two magnetic cores, and each magnetic core includes pedestal
With the center pillar for being fixed on the pedestal side and two side columns, the center pillar is located between two side columns, two magnetic
Cored structure is symmetrical and is fixedly connected；And corresponding at least one coil being arranged on the center pillar of each magnetic core.
Optionally, the magnetic core includes PQ type magnetic core or RM type magnetic core.
Optionally, the coil includes flatwise coil or enameled wire loop.
Optionally, the flatwise coil includes flat stagger-wound coil or flat vertical coiling.
Optionally, the middle post shapes include cylinder, elliptical cylinder-shape, cube shaped or cuboid.
Preferably, being provided with insulating film or epoxy partition between the coil.
Preferably, the common mode inductance further includes epoxy bottom plate, two magnetic cores are fixed on epoxy bottom plate side,
And each coil starting point and clearing end be fixed on the epoxy bottom plate.
Preferably, two magnetic cores are opposite and the surface of connection is polished surface.
Preferably, two magnetic cores are adhesively fixed.
Common mode inductance provided by the embodiment of the utility model, by by the symmetrical connection of the magnetic core of two belt coils, thus
Closed magnetic circuit is formed, and selects different types of magnetic core or middle post shapes as needed, and then improve the space of common mode inductance
Utilization rate and poor common mode inductance amount, improve the saturated characteristic of common mode inductance, reduce processing cost.
Detailed description of the invention
Fig. 1 is an embodiment of the present invention common mode inductance schematic diagram；
Fig. 2 is the magnetic core main view of an embodiment of the present invention common mode inductance；
Fig. 3 is the magnetic core main view of another embodiment common mode inductance of the utility model；
Fig. 4 is two magnetic cores of an embodiment of the present invention common mode inductance with respect to connection schematic diagram.
Appended drawing reference:
1- magnetic core
2- coil
3- pedestal
4- center pillar
5- side column
6- epoxy partition
Specific embodiment
For the space utilization rate and poor common mode inductance amount for improving common mode inductance, improves the saturated characteristic of common mode inductance, reduce
Processing cost, the utility model embodiment provide a kind of common mode inductance.To make the purpose of this utility model, technical solution and excellent
Point is clearer, is described in further detail by the following examples to the utility model.
As shown in Figure 1 to Figure 3, the common mode inductance that an embodiment of the present invention provides includes two magnetic cores 1, each magnetic core
1 includes pedestal 3 and the center pillar 4 and two side columns 5 for being fixed on 3 side of pedestal, and center pillar 4 is located between two side columns 5, two magnetic cores
It 1 symmetrical configuration and is fixedly connected；And corresponding at least one coil 2 being arranged on the center pillar 4 of each magnetic core 1.
2 quantity of coil of above-mentioned utility model embodiment is unlimited, can be one, two or more.The shape of center pillar 4 is not
Limit, can be cylinder, elliptical cylinder-shape, cube shaped or cuboid.Furthermore it is also possible to according to actual needs, pass through change
The thickness of pedestal 3 or side column 5 changes the poor common mode inductance amount of common mode inductance to improve the space utilization rate of common mode inductance.
In an alternative embodiment of the utility model, the concrete type of magnetic core 1 is unlimited, such as can be PQ type magnetic core
Or RM type magnetic core etc..
As shown in Figure 1, the concrete type of coil 2 is unlimited in an embodiment of the utility model, it can be flatwise coil
Or enameled wire loop, the concrete type of flatwise coil is unlimited, can be flat stagger-wound coil or flat vertical coiling.
As shown in Figure 1, insulating film or epoxy partition 6 are provided between coil 2 in an embodiment of the utility model,
The setting of insulating film or epoxy partition 6 improves the performance reliability of coil 2.
In an embodiment of the utility model, common mode inductance further includes epoxy bottom plate (not shown), two magnetic cores 1
It is fixed on epoxy bottom plate side, and the starting point of each coil 2 and clearing end are fixed on epoxy bottom plate, the setting of epoxy bottom plate
Starting point and the clearing end for being conducive to fix each coil 2, facilitate the starting point of coil 2 and clearing end being welded to circuit board
On.
As shown in figure 4, two magnetic cores 1 are relatively and the surface of connection is polishing table in an embodiment of the utility model
Face, the polishing treatment of connection surface connect the magnetic core 1 of two symmetrical connections preferably, are conducive to the inductance for increasing common mode inductance
Amount.
In an embodiment of the utility model, two magnetic cores 1 are adhesively fixed, can be solid using adhesive tape or point glue sticking
It is fixed.
The manufacturing process of the utility model above-described embodiment common mode inductance is as follows: firstly, in the symmetrical company of two magnetic cores 1
Junction does polishing treatment, and will be sheathed on magnetic core 1 around the coil 2 made；Then, two magnetic cores 1 with coil 2 are opposite
Claim connection, forms closed magnetic circuit, place insulating film between the coil 2 on the coil 2 and another magnetic core 1 on a magnetic core 1
Or epoxy partition 6, blend compounds band or dispensing are adhesively fixed；Finally, the side of epoxy bottom plate is fixed on two magnetic cores 1, and
The starting point of each coil 2 and clearing end are fixed on epoxy bottom plate.
Common mode inductance provided by the embodiment of the utility model, by by the symmetrical connection of the magnetic core of two belt coils, thus
Closed magnetic circuit is formed, and selects different types of magnetic core or middle post shapes as needed, and then improve the space of common mode inductance
Utilization rate and poor common mode inductance amount, improve the saturated characteristic of common mode inductance, reduce processing cost.
Obviously, it is practical without departing from this can to carry out various modification and variations to the utility model by those skilled in the art
Novel spirit and scope.If in this way, these modifications and variations of the present invention belong to the utility model claims and
Within the scope of its equivalent technologies, then the utility model is also intended to include these modifications and variations.
Claims (9)
1. a kind of common mode inductance characterized by comprising
Two magnetic cores, each magnetic core include pedestal and the center pillar and two side columns for being fixed on the pedestal side, it is described in
Column is located between two side columns, and two core structures are symmetrical and are fixedly connected；And
Corresponding at least one coil being arranged on the center pillar of each magnetic core.
2. common mode inductance as described in claim 1, which is characterized in that the magnetic core includes PQ type magnetic core or RM type magnetic core.
3. common mode inductance as described in claim 1, which is characterized in that the coil includes flatwise coil or enameled wire loop.
4. common mode inductance as claimed in claim 3, which is characterized in that the flatwise coil includes flat stagger-wound coil or flat
Vertical coiling.
5. common mode inductance as described in claim 1, which is characterized in that the middle post shapes include cylinder, elliptical cylinder-shape, stand
Cube shape or cuboid.
6. common mode inductance as described in claim 1, which is characterized in that be provided between the coil insulating film or epoxy every
Plate.
7. common mode inductance as described in claim 1, which is characterized in that further include epoxy bottom plate, two magnetic cores are fixed on
Epoxy bottom plate side, and the starting point of each coil and clearing end are fixed on the epoxy bottom plate.
8. common mode inductance as described in claim 1, which is characterized in that two magnetic cores are relatively and the surface of connection is polishing
Surface.
9. common mode inductance as described in any one of claims 1 to 8, which is characterized in that two magnetic cores are adhesively fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820768268.3U CN208538600U (en) | 2018-05-22 | 2018-05-22 | A kind of common mode inductance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820768268.3U CN208538600U (en) | 2018-05-22 | 2018-05-22 | A kind of common mode inductance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208538600U true CN208538600U (en) | 2019-02-22 |
Family
ID=65394722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820768268.3U Active CN208538600U (en) | 2018-05-22 | 2018-05-22 | A kind of common mode inductance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208538600U (en) |
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2018
- 2018-05-22 CN CN201820768268.3U patent/CN208538600U/en active Active
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