CN108257768A - Poor common mode integrated inductor and its scattered magnet shielding structure - Google Patents
Poor common mode integrated inductor and its scattered magnet shielding structure Download PDFInfo
- Publication number
- CN108257768A CN108257768A CN201810019222.6A CN201810019222A CN108257768A CN 108257768 A CN108257768 A CN 108257768A CN 201810019222 A CN201810019222 A CN 201810019222A CN 108257768 A CN108257768 A CN 108257768A
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- magnetic
- scattered
- magnetic core
- common mode
- air gap
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- 230000004907 flux Effects 0.000 claims abstract description 16
- 238000005516 engineering process Methods 0.000 abstract description 5
- 150000001875 compounds Chemical class 0.000 abstract description 4
- 239000000696 magnetic material Substances 0.000 abstract description 4
- 230000005855 radiation Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005670 electromagnetic radiation Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/346—Preventing or reducing leakage fields
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/38—Auxiliary core members; Auxiliary coils or windings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F2017/0093—Common mode choke coil
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The present invention provides a kind of scattered magnet shielding structures of poor common mode integrated inductor.This dissipates magnet shielding structure, including magnetic core, the magnetic core has air gap, and the scattered magnet shielding structure further includes to shield the scattered magnetic screen portion of magnetic flux leaked out by the air gap, the scattered magnetic screen portion is connect with the magnetic core, and an at least branch for the air gap is blocked by the scattered magnetic screen portion.Scattered magnetic screen portion can be made in profit of the present invention of magnetic material, so as to which the position of air gap locally or globally be wrapped up, magnetic leakage is dissipated to stop, and so that dissipating the excessively scattered magnetic screen portion of magnetic flux comes back to main magnetic circuit up, solves the scattered magnetic radiation interference problem in existing compound common mode inductance technology.
Description
Technical field
The present invention relates to inductive technologies field, more particularly to a kind of scattered magnet shielding structure of poor common mode integrated inductor.
Background technology
In Switching Power Supply application field, common mode inductance mainly plays the spuious capacity current of compensation, filters out using wide
Harmful subharmonic in electric system, while also have and inhibit inrush phenomenon, limiting short-circuit current, lightning protection, wave arrestment, improve power
The effects that factor.
Common-mode inductor be from two groups of numbers of turn it is identical, formed around to opposite winding, usual two winding technique is in single envelope
On the magnet ring closed.The work of conventional common-mode inductance is inefficient (usually with two-stage or multistage), and loss value is high, applying frequency is narrow, volume is big,
Domestic Switching Power Supply cannot be promoted to develop toward plasticity high-performance direction.
To widen application band, reduction volume facilitates automation to process, in recent years, and the several poor common mode collection that has been born
Into inductance, it is illustrated in fig. 1 shown below.In Fig. 1, (a) is EI shape magnetic cores, and (b) is EU shape magnetic cores, and (c) is EE shape magnetic cores, and (d) is day word
Shape magnetic core.
Inductance in Fig. 1 increases the magnetic circuit channel for improving differential-mode component on the basis of traditional inductance, wherein, magnetic
Core has center pillar, and the application band of such integrated inductor is obviously improved, and completes identical electrical specifications, volume can be designed more
It is small.But drawback is equally existed, this is because for increasing the magnetic core center pillar of differential-mode component, it is necessary to air gap is opened, otherwise by this
The magnetic flux of center pillar easily saturation can lose the meaning for increasing the center pillar.
But magnetic flux pass through center pillar air gap when, have a large amount of magnetic flux and be leaked in the air, cause electromagnetic radiation pollution；Together
When such compound inductance to have part magnetic core be combined, magnetic flux leakage is also had at magnetic core splicing seams, equally exists electromagnetism
Radiation pollution problem as shown in dashed line in figure 2, represents magnetic flux leak case.
Invention content
The present invention provides a kind of scattered magnet shielding structure of poor common mode integrated inductor, to solve meeting at air gap in the prior art
The problem of thering is a large amount of magnetic flux to be leaked in the air, causing electromagnetic radiation pollution.
To solve the above problems, as one aspect of the present invention, a kind of scattered magnetic cup of poor common mode integrated inductor is provided
Shield structure, including magnetic core, the magnetic core has air gap, and the scattered magnet shielding structure further includes to be revealed for shielding by the air gap
The scattered magnetic screen portion of the magnetic flux gone out, the scattered magnetic screen portion are connect with the magnetic core, an at least branch for the air gap by institute
Scattered magnetic screen portion is stated to block.
Preferably, the magnetic core includes E shape magnetic core portions and the I shape magnetic cores portion with E shapes magnetic core portion cooperation, the scattered magnetic
Shielding part includes the side plate at the center pillar gap position corresponding to the magnetic core, and the side plate is connect, and described with I shape magnetic cores portion
Side plate extends to the side in the E shapes magnetic core portion.
Preferably, it is set in parallel in the I shapes magnetic core portion there are two the side plate, the center pillar air gap is located at described two
Between a side plate.
Preferably, the magnetic core includes E shape magnetic core portions and the I shape magnetic cores portion with E shapes magnetic core portion cooperation, the scattered magnetic
Shielding part includes casing, and described sleeve pipe is connect with I shape magnetic cores portion, and the center pillar air gap of the magnetic core is contained in described sleeve pipe.
Preferably, the scattered magnetic screen portion further includes the direction E shapes magnetic core portion side for being arranged on the I shapes magnetic core portion
Groove on surface, the free end of the lateral column in the E shapes magnetic core portion are located in the groove.
Preferably, the magnetic core includes the E shape magnetic core portion A and E shape magnetic core portion B to cooperate, the E shapes magnetic core portion A's
The end of center pillar is formed with the casing as the scattered magnetic screen portion, and the free end of the center pillar of the E shapes magnetic core portion B is contained in institute
It states in casing.
Preferably, the magnetic core is " day " font magnetic core, and the section in the scattered magnetic screen portion takes the shape of the letter U, " day " font
Side where the center pillar air gap of magnetic core is stuck in the groove of the U-shaped.
Preferably, the magnetic core includes the E shape magnetic core portions to cooperate and U-shaped magnetic core portion, and the scattered magnetic screen portion is cut
Face takes the shape of the letter U, and the side where the center pillar air gap of the magnetic core is stuck in the groove of the U-shaped.
Preferably, the scattered magnetic screen portion and the magnetic core are mutual discrete part or the scattered magnetic screen portion and institute
It is integrally formed to state magnetic core.
The present invention also provides a kind of poor common mode integrated inductor, including above-mentioned scattered magnet shielding structure.
Scattered magnetic screen portion can be made in profit of the present invention of magnetic material, so as to which the position of air gap locally or globally be wrapped up
Get up, dissipate magnetic leakage to stop, and scattered magnetic flux is caused to dissipate magnetic screen portion excessively and come back to main magnetic circuit up, solve existing compound
Scattered magnetic radiation interference problem in type common mode inductance technology.
Description of the drawings
Fig. 1 schematically shows the structure diagram of four kinds of magnetic cores of the prior art；
Magnetic flux Fig. 2 schematically shows EI shape magnetic cores reveals schematic diagram；
Fig. 3 schematically shows the exploded view of the first embodiment of the EI shape magnetic cores in the present invention；
Fig. 4 schematically shows the assembling figures of the first embodiment of the EI shape magnetic cores in the present invention；
Fig. 5 schematically shows the exploded view of the second embodiment of the EI shape magnetic cores in the present invention；
Fig. 6 schematically shows the assembling figure of the second embodiment of the EI shape magnetic cores in the present invention；
Fig. 7 schematically shows the exploded view of the EE shape magnetic cores in the present invention；
Fig. 8 schematically shows the assembling figure of the EE shape magnetic cores in the present invention；
Fig. 9 schematically shows the front view of the stud magnetic core in the present invention；
Figure 10 schematically shows the side view of Fig. 9；
Figure 11 schematically shows the stereogram of the stud magnetic core in the present invention；
Figure 12 schematically shows the schematic diagram of poor common mode integrated inductor of the prior art；
Figure 13 schematically shows the schematic diagram of the poor common mode integrated inductor in the present invention.
Reference numeral in figure：1st, E shapes magnetic core portion；2nd, I shapes magnetic core portion；3rd, center pillar air gap；4th, side plate；5th, casing；6th, groove；
7th, E shapes magnetic core portion A；8th, E shapes magnetic core portion B；9th, U-shaped magnetic core portion.
Specific embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be defined by the claims
Implement with the multitude of different ways of covering.
One aspect of the present invention provides a kind of scattered magnet shielding structure of poor common mode integrated inductor, described including magnetic core
Magnetic core has air gap, and the scattered magnet shielding structure further includes to shield the scattered magnetic screen of magnetic flux leaked out by the air gap
Portion, the scattered magnetic screen portion are connect with the magnetic core, and an at least branch for the air gap is blocked by the scattered magnetic screen portion.It dissipates
The material of magnet shielding structure can or other magnetic conductive materials, such as powder core, amorphous etc. identical with magnetic core.
As it can be seen that scattered magnetic screen portion can be made in profit of the present invention of magnetic material, so as to which the position of air gap is local or whole
Body wraps up, and dissipates magnetic leakage to stop, and scattered magnetic flux is caused to dissipate magnetic screen portion excessively and come back to main magnetic circuit up, solves existing
There is the scattered magnetic radiation interference problem in compound common mode inductance technology.
In one embodiment it is preferred that the magnetic core includes E shape magnetic cores portion 1 and the I with the E shapes magnetic core portion 1 cooperation
Shape magnetic core portion 2, the scattered magnetic screen portion include the side plate 4 at 3 position of center pillar air gap corresponding to the magnetic core, the side plate 4
It is connect with I shape magnetic cores portion 2, and the side plate 4 extends to the side in the E shapes magnetic core portion 1.Preferably, the I shapes magnetic core portion 2
On be set in parallel there are two the side plate 4, the center pillar air gap 3 is between described two side plates 4.Wherein, the length of side plate 4
Wide size is more than the length and width dimensions of air gap.
In another embodiment it is preferred that the magnetic core includes E shape magnetic cores portion 1 and coordinates with the E shapes magnetic core portion 1
I shape magnetic cores portion 2, the scattered magnetic screen portion includes casing 5, and described sleeve pipe 5 connect, and with I shape magnetic cores portion 2 in the magnetic core
Column air gap 3 is contained in described sleeve pipe 5.Casing 5 can be square tube, and the length, width and height size of inner cavity is more than void dimension.
It is highly preferred that the scattered magnetic screen portion further includes the direction E shapes magnetic core portion 1 for being arranged on the I shapes magnetic core portion 2
Groove 6 on one side surface, the free end of the lateral column in the E shapes magnetic core portion 1 are located in the groove 6.
Preferably, the magnetic core includes E shape magnetic core portion A7 and E the shape magnetic cores portion B8, the E shapes magnetic core portion A7 that cooperate
The end of center pillar be formed with the casing 5 as the scattered magnetic screen portion, the free end of the center pillar of the E shapes magnetic core portion B8 accommodates
In described sleeve pipe 5.Casing 5 can be square tube, and the length, width and height size of inner cavity is more than void dimension.
Preferably, the magnetic core is " day " font magnetic core, and the section in the scattered magnetic screen portion takes the shape of the letter U, " day " font
Side where the center pillar air gap 3 of magnetic core is stuck in the groove of the U-shaped.The length, width and height size of the groove of the U-shaped is more than gas
Gap size.
Preferably, the magnetic core includes the E shape magnetic cores portion 1 to cooperate and U-shaped magnetic core portion 9, the scattered magnetic screen portion
Section takes the shape of the letter U, and the side where the center pillar air gap 3 of the magnetic core is stuck in the groove of the U-shaped.
Preferably, the scattered magnetic screen portion and the magnetic core are mutual discrete part or the scattered magnetic screen portion and institute
It is integrally formed to state magnetic core.
The present invention also provides a kind of poor common mode integrated inductor, including above-mentioned scattered magnet shielding structure.
Overall plan of the present invention utilizes magnetic material, and gap position is locally or globally wrapped up, and stops and dissipates outside magnetic
Leakage, and scattered magnetic flux is caused to cross shielding magnet and come back to main magnetic circuit up；Aerial magnetic flux is scattered to, it can be by the shielded layer on periphery
It absorbs, shielded layer is connect with magnetic core main body, is dissipated the energy of magnetic and can be come back in magnetic core main body, is solving the same of electromagnetic radiation
When, moreover it is possible to advanced optimize performance.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, that is made any repaiies
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of scattered magnet shielding structure of difference common mode integrated inductor, which is characterized in that including magnetic core, the magnetic core has air gap,
The scattered magnet shielding structure further includes to shield the scattered magnetic screen portion of magnetic flux leaked out by the air gap, the scattered magnetic screen
Portion is connect with the magnetic core, and an at least branch for the air gap is blocked by the scattered magnetic screen portion.
2. the scattered magnet shielding structure of difference common mode integrated inductor according to claim 1, which is characterized in that the magnetic core includes
E shape magnetic cores portion (1) and the I shape magnetic cores portion (2) with the E shapes magnetic core portion (1) cooperation, the scattered magnetic screen portion include corresponding to institute
The side plate (4) at center pillar air gap (3) position of magnetic core is stated, the side plate (4) connect, and the side plate with I shape magnetic cores portion (2)
(4) extend to the side of the E shapes magnetic core portion (1).
3. the scattered magnet shielding structure of difference common mode integrated inductor according to claim 2, which is characterized in that the I shapes magnetic core
The side plate (4) there are two being set in parallel in portion (2), the center pillar air gap (3) is between described two side plates (4).
4. the scattered magnet shielding structure of difference common mode integrated inductor according to claim 1, which is characterized in that the magnetic core includes
E shape magnetic cores portion (1) and the I shape magnetic cores portion (2) with the E shapes magnetic core portion (1) cooperation, the scattered magnetic screen portion include casing (5),
Described sleeve pipe (5) is connect with I shape magnetic cores portion (2), and the center pillar air gap (3) of the magnetic core is contained in described sleeve pipe (5).
5. the scattered magnet shielding structure of difference common mode integrated inductor according to any one of claim 2 to 4, which is characterized in that
The scattered magnetic screen portion, which further includes, to be arranged on direction (1) one side surface of E shapes magnetic core portion of the I shapes magnetic core portion (2)
Groove (6), the free end of the lateral column () of the E shapes magnetic core portion (1) are located in the groove (6).
6. the scattered magnet shielding structure of difference common mode integrated inductor according to claim 1, which is characterized in that the magnetic core includes
The E shape magnetic core portion A (7) of mutual cooperation and E shape magnetic core portion B (8), the end of the center pillar of the E shapes magnetic core portion A (7) form useful
Make the casing (5) in the scattered magnetic screen portion, the free end of the center pillar of the E shapes magnetic core portion B (8) is contained in described sleeve pipe (5).
7. the scattered magnet shielding structure of difference common mode integrated inductor according to claim 1, which is characterized in that the magnetic core is
" day " font magnetic core, the section in the scattered magnetic screen portion take the shape of the letter U, and one where the center pillar air gap (3) of " day " the font magnetic core
Side is stuck in the groove of the U-shaped.
8. the scattered magnet shielding structure of difference common mode integrated inductor according to claim 1, which is characterized in that the magnetic core includes
The E shape magnetic cores portion (1) of mutual cooperation and U-shaped magnetic core portion (9), the section in the scattered magnetic screen portion take the shape of the letter U, the center pillar of the magnetic core
Side where air gap (3) is stuck in the groove of the U-shaped.
9. the scattered magnet shielding structure of difference common mode integrated inductor according to claim 1, which is characterized in that the scattered magnetic screen
Portion is that mutually discrete part or the scattered magnetic screen portion and the magnetic core are integrally formed with the magnetic core.
A kind of 10. difference common mode integrated inductor, which is characterized in that the scattered magnetic screen knot described in including any one of claim 1-9
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810019222.6A CN108257768A (en) | 2018-01-09 | 2018-01-09 | Poor common mode integrated inductor and its scattered magnet shielding structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810019222.6A CN108257768A (en) | 2018-01-09 | 2018-01-09 | Poor common mode integrated inductor and its scattered magnet shielding structure |
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| Publication Number | Publication Date |
|---|---|
| CN108257768A true CN108257768A (en) | 2018-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810019222.6A Pending CN108257768A (en) | 2018-01-09 | 2018-01-09 | Poor common mode integrated inductor and its scattered magnet shielding structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4163939A1 (en) | 2021-10-07 | 2023-04-12 | Delta Electronics (Thailand) Public Co., Ltd. | Magnetic component with a fringing field shielding device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201036112Y (en) * | 2007-01-19 | 2008-03-12 | 福州大学 | Novel inductor for coil using magnetic shielding |
| CN201498303U (en) * | 2009-09-28 | 2010-06-02 | 清流县鑫磁线圈制品有限公司 | Electric inductance element |
| CN201725663U (en) * | 2010-03-17 | 2011-01-26 | 清流县鑫磁线圈制品有限公司 | IB type combined magnetic core |
| CN206293265U (en) * | 2017-01-06 | 2017-06-30 | 东莞市健阳达电子有限公司 | A kind of modified form shielded transformer |
| CN207883461U (en) * | 2018-01-09 | 2018-09-18 | 深圳市雅玛西电子有限公司 | Poor common mode integrated inductor and its scattered magnet shielding structure |
-
2018
- 2018-01-09 CN CN201810019222.6A patent/CN108257768A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201036112Y (en) * | 2007-01-19 | 2008-03-12 | 福州大学 | Novel inductor for coil using magnetic shielding |
| CN201498303U (en) * | 2009-09-28 | 2010-06-02 | 清流县鑫磁线圈制品有限公司 | Electric inductance element |
| CN201725663U (en) * | 2010-03-17 | 2011-01-26 | 清流县鑫磁线圈制品有限公司 | IB type combined magnetic core |
| CN206293265U (en) * | 2017-01-06 | 2017-06-30 | 东莞市健阳达电子有限公司 | A kind of modified form shielded transformer |
| CN207883461U (en) * | 2018-01-09 | 2018-09-18 | 深圳市雅玛西电子有限公司 | Poor common mode integrated inductor and its scattered magnet shielding structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4163939A1 (en) | 2021-10-07 | 2023-04-12 | Delta Electronics (Thailand) Public Co., Ltd. | Magnetic component with a fringing field shielding device |
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