CN208922882U - A kind of common mode inductance, electromagnetic interface filter and Switching Power Supply - Google Patents
A kind of common mode inductance, electromagnetic interface filter and Switching Power Supply Download PDFInfo
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- CN208922882U CN208922882U CN201821936193.1U CN201821936193U CN208922882U CN 208922882 U CN208922882 U CN 208922882U CN 201821936193 U CN201821936193 U CN 201821936193U CN 208922882 U CN208922882 U CN 208922882U
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- common mode
- mode inductance
- auxiliary magnet
- magnetic core
- magnetic induction
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
- H01F2003/106—Magnetic circuits using combinations of different magnetic materials
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- Composite Materials (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Filters And Equalizers (AREA)
Abstract
The utility model embodiment provides a kind of common mode inductance, electromagnetic interface filter and Switching Power Supply, is related to electromagnetic technology field, to solve the technical issues of cannot combining good common mode filtering performance and differential mode filtering performance in the prior art；The common mode inductance of the utility model includes magnetic core and at least two magnetic induction loops, and at least two magnetic induction loop is wound around on the magnetic core；Wherein, the number of turns and phase of the two neighboring magnetic induction loop are all the same；The common mode inductance further includes auxiliary magnet, and the auxiliary magnet is arranged between two adjacent magnetic induction loops.The common mode inductance structure of the utility model embodiment is simple, compact, and volume occupancy is small, has good common mode filtering performance and differential mode filtering performance, while being also not susceptible to magnetic saturation phenomenon.
Description
Technical field
The utility model relates to electromagnetic technology field more particularly to a kind of common mode inductances, electromagnetic interface filter and Switching Power Supply.
Background technique
For ideal inductor models, after coil winding is on magnetic core, all magnetic fluxs are all concentrated in coil
It is intracardiac；But in practical situations, coil will not be not close around full or coiling, can cause the leakage of magnetic flux in this way；Common mode inductance
In generally tool there are two winding, there is biggish gap between two windings, the leakage of magnetic flux can be generated in this way and form differential mode
Inductance, therefore, actually common mode inductance can not only realize common mode filtering function, additionally it is possible to realize a degree of differential mode filtering
Function.
In current electronic product, small size, high density, the demand of space-efficient electromagnetic interface filter are more and more, because
This, all realizes the dual function of common mode filtering and differential mode filtering in general electromagnetic interface filter only with common mode inductance；But
It is that under the premise of small size, space-efficient, the common mode sensibility reciprocal of common mode inductance can also be ensured effectively, still
Differential mode sensibility reciprocal is often relatively low；Therefore, common mode inductance how to be enabled to combine good common mode filtering performance and differential mode
Filtering performance, while being also contemplated that in use and magnetic saturation does not occur, become prior art urgent problem to be solved.
Utility model content
The utility model provide a kind of common mode inductance for taking into account good common mode filtering performance and differential mode filtering performance,
Electromagnetic interface filter and Switching Power Supply.
In a first aspect, the utility model provides a kind of common mode inductance, including magnetic core and at least two magnetic induction loops, it is described
At least two magnetic induction loops are wound around on the magnetic core；
Wherein, the number of turns and phase of the two neighboring magnetic induction loop are all the same；
The common mode inductance further includes auxiliary magnet, and the auxiliary magnet is arranged between two adjacent magnetic induction loops.
As an example, the auxiliary magnet is laminated structure；
Wherein, the material of the auxiliary magnet is amorphous soft magnetic alloy, any one in nano-crystal soft magnetic alloy.
As an example, the magnetic core is Nian Jie with the auxiliary magnet.
As an example, the magnetic core includes U-shaped main body and newel；
Wherein, the U-shaped main body includes foundation and two side columns being oppositely arranged, and the both ends of the newel are respectively with two
A side column connection；
The common mode inductance includes two magnetic induction loops, and two magnetic induction loops are wound around the newel
On.
As an example, the auxiliary magnet is fixed on the newel, and it is arranged far from the foundation.
As an example, the periphery of the auxiliary magnet is coated with insulating layer.
As an example, the magnetic core is circular ring shape, the common mode inductance includes two magnetic induction loops；
The auxiliary magnet is plate-like structure；
Wherein, the opposite both ends of the auxiliary magnet are connect with the inner wall of the magnetic core.
As an example, the magnetic core is circular ring shape, the common mode inductance includes three magnetic induction loops；
The auxiliary magnet is herringbone structure；
Wherein, the diverging end of the auxiliary magnet is connect with the inner wall of the magnetic core.
Second aspect, the utility model additionally provide a kind of electromagnetic interface filter comprising common mode described in any one of the above
Inductance.
The third aspect, the utility model additionally provide a kind of Switching Power Supply, including rectification circuit and DC/DC converter,
In, the Switching Power Supply further includes above-mentioned electromagnetic interface filter.
The beneficial effect of the utility model embodiment is:
The common mode inductance structure of the utility model embodiment is simple, compact, and volume occupancy is small, has the filter of good common mode
Wave performance and differential mode filtering performance, while being also not susceptible to magnetic saturation phenomenon.
Detailed description of the invention
Fig. 1 is the schematic perspective view of the embodiment one of the common mode inductance of the utility model；
Fig. 2 is the schematic diagram of the section structure of the embodiment one of the common mode inductance of the utility model；
Fig. 3 is the structural schematic diagram of the embodiment two of the common mode inductance of the utility model；
Fig. 4 is the structural schematic diagram of the embodiment three of the common mode inductance of the utility model.
Appended drawing reference:
1- magnetic core；11- newel；2- magnetic induction loop；3- auxiliary magnet.
Specific embodiment
In order to make those skilled in the art better understand the technical solution of the utility model, with reference to the accompanying drawings of the specification
The utility model embodiment is described in detail.
In a first aspect, the utility model embodiment provides a kind of common mode inductance, including magnetic core and at least two magnetic induction lines
Circle, the magnetic induction loop are wound around on magnetic core；Wherein, the number of turns and phase of two neighboring magnetic induction loop are all the same；Common mode inductance is also
Including auxiliary magnet, auxiliary magnet is arranged between two adjacent magnetic induction loops.After magnetic induction loop is wound on magnetic core, by
There is gap between two neighboring magnetic induction loop, thus the case where flux leakage can be generated, and differential mode inductance is formed, this is practical
It is novel by the way that auxiliary magnet is arranged between two neighboring magnetic induction loop, so that the differential mode filtering performance for enhancing common mode inductance (can
Increase by 25%~50%), while adverse effect will not be caused to common mode filtering performance.
Specifically, auxiliary magnet is laminated structure, wherein auxiliary magnet in embodiment provided by the utility model
Material is amorphous soft magnetic alloy, any one in nano-crystal soft magnetic alloy.This structure setting not will increase common mode not only
The volume size of inductance, additionally it is possible to enhance its differential mode filtering performance to greatest extent.It in the specific implementation, can be according to different sizes
And the magnetic core of type cuts auxiliary magnet, is folded；Further, for the ease of making, in the utility model embodiment
Auxiliary magnet and magnetic core or magnetic induction loop it is Nian Jie using binder；Wherein, binder be specifically as follows organic silica gel, dry glue,
Epoxy glue etc., those skilled in the art can according to actual needs be specifically chosen the material of binder.
In addition, the structure of auxiliary magnet is also not limited to laminated structure, for example, it is also possible to which this is practical new for column etc.
Type is not especially limited the specific structure of auxiliary magnet, in addition, those skilled in the art can also be according to actual needs to auxiliary
The material of magnetic assist body is selected.
Specifically, as depicted in figs. 1 and 2, in embodiment one provided by the utility model, magnetic core 1 include U-shaped main body and
Newel 11；Wherein, U-shaped main body includes foundation and two side columns being oppositely arranged, the both ends of newel 11 respectively with two sides
Column connection；Common mode inductance includes two magnetic induction loops 2, and two magnetic induction loops 2 are wound around on newel 11；Auxiliary magnet 3
It for rectangular sheet, and is fixed on newel 11, and is arranged far from foundation.
Wherein, the material of magnetic core 1 can be any one in powder core, iron sial, ferrite；In addition, for the ease of
The 1 of magnetic core makes and the coiling of magnetic induction loop 2, and the magnetic core 1 in the present embodiment is made of two parts of radial symmetric (i.e. with two
Plane between magnetic induction loop 2 is division surface)；Specifically, each part includes a side column, a part of newel 11 and one
Part foundation；Wherein, two component parts of magnetic core 1 can be bonded after radial abutment by binder.Certainly, at other
Magnetic core 1 or integral structure in embodiment；The utility model is not especially limited the specific molding structure of magnetic core 1.
Further, in order to further enhance differential mode filtering performance, being adapted to property of the length increase of two side columns (increases
The distance between the end of edged column and newel 11).
In the present embodiment, performance test also has been carried out to above-mentioned common mode inductance, test data is as follows:
First group:
Second group:
Through above-mentioned two groups of data it is found that compared with the common mode inductance of not set auxiliary magnet 3, the utility model embodiment
Common mode inductance its differential mode filtering performance is had been significantly improved.
Further, in order to increase the security performance of common mode inductance, in the present embodiment, the periphery of auxiliary magnet 3 is coated with
Insulating layer.Wherein, insulating layer can also use insulating cement using technological formings such as overlay films in the outer surface of auxiliary magnet 3
Band is covered in the outer surface of auxiliary magnet 3.
In addition, as shown in figure 3, magnetic core 1 is circular ring shape, common mode inductance packet in embodiment two provided by the utility model
Include two magnetic induction loops 2；Auxiliary magnet 3 is plate-like structure；Wherein, the opposite both ends of auxiliary magnet 3 are interior with magnetic core 1
Wall connection.
Specifically, in specific production, it can be according to the size (such as internal diameter and thickness) of magnetic core 1 to auxiliary magnet 3
Shape is cut, to be adapted to the concrete shape construction of magnetic core 1.
Wherein, the material of magnetic core 1 can be any one in powder core, iron sial, ferrite；Further, in order to
The security performance for increasing common mode inductance, in the present embodiment, the periphery of auxiliary magnet 3 is coated with insulating layer.Wherein, insulating layer can be with
Using technological formings such as overlay films in the outer surface of auxiliary magnet 3, the appearance of auxiliary magnet 3 can also be covered in using insulating tape
Face.
In addition, as shown in figure 4, magnetic core 1 is circular ring shape, common mode inductance packet in embodiment three provided by the utility model
Include three magnetic induction loops 2 (can be used for the filtering to three-phase alternating current)；Auxiliary magnet 3 is herringbone structure；Wherein, auxiliary magnet
3 diverging end (i.e. far from the end of crossing center) is connect with the inner wall of magnetic core 1.
Specifically, in specific production, it can be according to the size (such as internal diameter and thickness) of magnetic core 1 to auxiliary magnet 3
Shape is cut, is folded, to be adapted to the concrete shape construction of magnetic core 1.
Wherein, the material of magnetic core 1 can be any one in powder core, iron sial, ferrite；Further, in order to
The security performance for increasing common mode inductance, in the present embodiment, the periphery of auxiliary magnet 3 is coated with insulating layer.Wherein, insulating layer can be with
Using technological formings such as overlay films in the outer surface of auxiliary magnet 3, the appearance of auxiliary magnet 3 can also be covered in using insulating tape
Face.
Second aspect, the utility model embodiment additionally provide a kind of electromagnetic interface filter (not shown) comprising above-mentioned
Common mode inductance.By the above-mentioned common mode inductance of application so that the internal structure of electromagnetic interface filter is more compact, so as to
The volume size of electromagnetic interface filter is advanced optimized, simultaneously, moreover it is possible to it be made to be provided simultaneously with stronger common mode filtering performance and differential mode filter
Wave performance.
The third aspect, the utility model embodiment additionally provide a kind of Switching Power Supply (not shown), including rectified current
Road and DC/DC converter, wherein Switching Power Supply further includes above-mentioned electromagnetic interface filter.By application above-mentioned electromagnetic interface filter from
And make the structure of Switching Power Supply more compact, meanwhile, it is also equipped with stronger common mode filtering performance and differential mode filtering performance.
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 (10)
1. a kind of common mode inductance, which is characterized in that including magnetic core and at least two magnetic induction loops, at least two magnetic induction loop
It is wound around on the magnetic core；
Wherein, the number of turns and phase of the two neighboring magnetic induction loop are all the same；
The common mode inductance further includes auxiliary magnet, and the auxiliary magnet is arranged between two adjacent magnetic induction loops.
2. common mode inductance according to claim 1, which is characterized in that the auxiliary magnet is laminated structure；
Wherein, the material of the auxiliary magnet is amorphous soft magnetic alloy, any one in nano-crystal soft magnetic alloy.
3. common mode inductance according to claim 1, which is characterized in that the magnetic core is Nian Jie with the auxiliary magnet.
4. common mode inductance according to claim 1, which is characterized in that the magnetic core includes U-shaped main body and newel；
Wherein, the U-shaped main body includes foundation and two side columns being oppositely arranged, the both ends of the newel respectively with two institutes
State side column connection；
The common mode inductance includes two magnetic induction loops, and two magnetic induction loops are wound around on the newel.
5. common mode inductance according to claim 4, which is characterized in that the auxiliary magnet is fixed on the newel,
And it is arranged far from the foundation.
6. common mode inductance according to claim 1, which is characterized in that the periphery of the auxiliary magnet is coated with insulating layer.
7. common mode inductance according to claim 1, which is characterized in that the magnetic core is circular ring shape, the common mode inductance packet
Include two magnetic induction loops；
The auxiliary magnet is plate-like structure；
Wherein, the opposite both ends of the auxiliary magnet are connect with the inner wall of the magnetic core.
8. common mode inductance according to claim 1, which is characterized in that the magnetic core is circular ring shape, the common mode inductance packet
Include three magnetic induction loops；
The auxiliary magnet is herringbone structure；
Wherein, the diverging end of the auxiliary magnet is connect with the inner wall of the magnetic core.
9. a kind of electromagnetic interface filter, which is characterized in that including common mode inductance as claimed in any of claims 1 to 8 in one of claims.
10. a kind of Switching Power Supply, including rectification circuit and DC/DC converter, which is characterized in that the Switching Power Supply further include as
Electromagnetic interface filter as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821936193.1U CN208922882U (en) | 2018-11-22 | 2018-11-22 | A kind of common mode inductance, electromagnetic interface filter and Switching Power Supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821936193.1U CN208922882U (en) | 2018-11-22 | 2018-11-22 | A kind of common mode inductance, electromagnetic interface filter and Switching Power Supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208922882U true CN208922882U (en) | 2019-05-31 |
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ID=66712277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821936193.1U Active CN208922882U (en) | 2018-11-22 | 2018-11-22 | A kind of common mode inductance, electromagnetic interface filter and Switching Power Supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111554472A (en) * | 2020-05-26 | 2020-08-18 | 台达电子企业管理（上海）有限公司 | Filter inductance and vehicle-mounted charger |
| CN114242412A (en) * | 2021-11-04 | 2022-03-25 | 华为数字能源技术有限公司 | Magnetic element and electronic device |
-
2018
- 2018-11-22 CN CN201821936193.1U patent/CN208922882U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111554472A (en) * | 2020-05-26 | 2020-08-18 | 台达电子企业管理（上海）有限公司 | Filter inductance and vehicle-mounted charger |
| CN111554472B (en) * | 2020-05-26 | 2022-03-25 | 台达电子企业管理（上海）有限公司 | Filter inductance and vehicle-mounted charger |
| CN114242412A (en) * | 2021-11-04 | 2022-03-25 | 华为数字能源技术有限公司 | Magnetic element and electronic device |
| EP4177913A1 (en) * | 2021-11-04 | 2023-05-10 | Huawei Digital Power Technologies Co., Ltd. | Magnetic element and electronic device |
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