CN108492965A - A kind of New Type of Differential common mode filtering induction structure - Google Patents
A kind of New Type of Differential common mode filtering induction structure Download PDFInfo
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- CN108492965A CN108492965A CN201810210267.1A CN201810210267A CN108492965A CN 108492965 A CN108492965 A CN 108492965A CN 201810210267 A CN201810210267 A CN 201810210267A CN 108492965 A CN108492965 A CN 108492965A
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- magnetic core
- hole
- copper bar
- common mode
- mode filtering
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Links
- 238000001914 filtration Methods 0.000 title claims abstract description 46
- 230000006698 induction Effects 0.000 title claims abstract description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 64
- 239000010949 copper Substances 0.000 claims abstract description 64
- 229910052802 copper Inorganic materials 0.000 claims abstract description 64
- 238000004804 winding Methods 0.000 claims abstract description 6
- 239000004593 Epoxy Substances 0.000 claims description 21
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 7
- 229910000859 α-Fe Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229910000906 Bronze Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010923 batch production Methods 0.000 description 2
- 239000010974 bronze Substances 0.000 description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 229910003962 NiZn Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- BNPSSFBOAGDEEL-UHFFFAOYSA-N albuterol sulfate Chemical compound OS(O)(=O)=O.CC(C)(C)NCC(O)C1=CC=C(O)C(CO)=C1.CC(C)(C)NCC(O)C1=CC=C(O)C(CO)=C1 BNPSSFBOAGDEEL-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
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- 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
-
- 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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2847—Sheets; Strips
-
- 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
Abstract
The invention discloses a kind of New Type of Differential common mode filtering induction structure, which includes the first magnetic core, the second magnetic core, third magnetic core, the 4th magnetic core, the first copper bar and the second copper bar；First magnetic core fits with the second magnetic core, first through hole and the second through-hole is formed simultaneously between the first magnetic core and the second magnetic core, and be connected to by the first air gap between first through hole and the second through-hole；Third magnetic core fits with the 4th magnetic core, third through-hole and fourth hole is formed simultaneously between third magnetic core and the 4th magnetic core, and be connected to by interstice between third through-hole and fourth hole；First copper bar and the second copper bar are used to as winding, and the first copper bar passes through the second through-hole and fourth hole, the second copper bar to pass through first through hole and third through-hole.Difference common mode filtering inductance provided by the present invention has the advantages that compact-sized, through-current capability is strong, filtering performance is good, and can configure filtering characteristic and carry out modularization extension.
Description
Technical field
The present invention relates to inductance element technical fields, specifically for, the present invention be a kind of New Type of Differential common mode filtering electricity
Feel structure.
Background technology
It will produce serious Conducted Electromagnetic Interference (EMI) in the HF switch course of work of Switching Power Supply, and EMI can influence
The normal work of other electronic equipments.Therefore, it is necessary to outputting and inputting using electromagnetic interface filter in Switching Power Supply.Electromagnetic interface filter
Main electronic parts include：Differential mode inductance and common mode inductance.In order to meet the requirement of smaller power volume, often by differential mode
Inductance and common mode inductance are integrated, to obtain poor common mode filtering inductance.
Currently, conventional poor common mode filtering induction structure is frequently with toroidal core.But it is filtered using made of toroidal core
There are the following problems for wave inductance：(1) filter inductance of ring core structure is only applicable to low current occasion, is not suitable for high current and answers
Use occasion；(2) filter inductance of ring core structure will produce leakage inductance, need that magnetic layer is additionally arranged, and the peace of magnetic layer
Dress fixation is relatively difficult；(3) the filter inductance consistency of ring core structure is poor, is unfavorable for producing in batches, is not easy to power
Extension, inductance production cost are higher.
Therefore, filter inductance how to be made to be suitable for high current occasion, the effectively structure of the poor common mode filtering inductance of optimization, raising
The applicability and consistency of poor common mode filtering inductance become those skilled in the art's technical problem urgently to be resolved hurrily and grind always
The emphasis studied carefully.
Invention content
To solve that high current occasion can not be suitable for existing for the filter inductance of existing ring core structure, need to additionally be arranged
The problems such as magnetic layer, high consistency difference and production cost, the present invention innovatively provides a kind of New Type of Differential common mode filtering inductance knot
Structure, has thoroughly abandoned the limitation of traditional endless core structure, and use four magnetic cores be bonded two-by-two formation for copper bar (around
Group) by through-hole structure type, realize and efficiently solve existing skill by way of optimizing poor common mode filtering induction structure
Problems present in art.
To realize the above-mentioned technical purpose, the invention discloses a kind of New Type of Differential common mode filtering induction structure, difference common mode filters
Wave induction structure includes the first magnetic core, the second magnetic core, third magnetic core, the 4th magnetic core, the first copper bar and the second copper bar；First magnetic
Core fits with the second magnetic core, and first through hole and second is formed simultaneously between first magnetic core and second magnetic core and is led to
Hole, and be connected to by the first air gap between first through hole and the second through-hole；Third magnetic core fits with the 4th magnetic core, described
It is formed simultaneously third through-hole and fourth hole between three magnetic cores and the 4th magnetic core, and leads between third through-hole and fourth hole
Cross interstice connection；First copper bar and second copper bar are used to as winding, and first copper bar passes through second
Through-hole and fourth hole, second copper bar pass through first through hole and third through-hole.
Based on above-mentioned technical solution, New Type of Differential common mode filtering inductance provided by the present invention can be answered suitable for high current
With occasion, magnetic layer need not be set, have the protrusions such as compact-sized, consistency is good, strong applicability, galvanization ability are strong excellent
Point, convenient for batch production and power expansion, to effectively reduce the production cost of inductance.
Further, first magnetic core and second magnetic core form a secondary EE type magnetic cores, the center of the EE type magnetic cores
It is provided with the first air gap.
Further, the third magnetic core and the 4th magnetic core form a secondary EE type magnetic cores, the center of the EE type magnetic cores
It is provided with interstice.
Based on above-mentioned improved technical solution, the present invention by two secondary EE type magnetic cores realize the first magnetic core, the second magnetic core,
Third magnetic core, the 4th magnetic core, to achieve the purpose that further to be substantially reduced poor common mode filtering inductance manufacturing cost.
Further, first copper bar and second copper bar are U-shaped, and two open ends of the first copper bar are each passed through
Two open ends of the second through-hole and fourth hole, the second copper bar are each passed through first through hole and third through-hole.
Further, the surface of first copper bar and the surface of second copper bar are wound with Kapton.
Based on above-mentioned improved technical solution, the present invention can effectively ensure that the dielectric strength between winding and magnetic core, that is, have
Effect ensures the dielectric strength between each copper bar and each magnetic core, to effectively improve poor common mode filtering inductance made in accordance with the present invention
Reliability and safety.
Further, the first magnetic core, the second magnetic core, third magnetic core and the 4th magnetic core are set gradually, and second magnetic core is also
It fits with the third magnetic core.
Further, which further includes epoxy bottom plate, the first magnetic core, the second magnetic core, third magnetic
Core, the 4th magnetic core are both secured on the epoxy bottom plate.
Further, the through-hole passed through for first copper bar and second copper bar is provided on the epoxy bottom plate,
It is fixed using epoxide-resin glue between epoxy bottom plate and each magnetic core, between epoxy bottom plate and each copper bar.
Based on above-mentioned improved technical solution, the present invention preferably realizes the fixation of each magnetic core and copper bar, to significantly
Improve the reliability of poor common mode filtering inductance made in accordance with the present invention.
Further, it is also opened on the epoxy bottom plate there are four groove, and first magnetic core one end, second magnetic core one end, the
Three magnetic core one end, the 4th magnetic core one end are inserted in successively in four grooves.
Further, the first magnetic core, the second magnetic core, third magnetic core, the 4th magnetic core, the first copper bar and the second copper bar are formed
One inductance unit is fixed with multiple inductance units on one epoxy bottom plate.
Based on above-mentioned improved technical solution, the present invention can relatively easily carry out modularized design, modular filtering
Inductance have the advantages that it is compact-sized, be conducive to improve power supply power density, to realize as needed assembling corresponding number
Inductance unit, the final purpose for realizing low-and high-frequency filtering.
Beneficial effects of the present invention are：Difference common mode filtering inductance provided by the present invention has compact-sized, through-current capability
By force, the good advantage of filtering performance, and filtering characteristic can be configured and carry out modularization extension.
Description of the drawings
Fig. 1 is the schematic diagram of New Type of Differential common mode filtering induction structure.
Fig. 2 is the schematic top plan view of four magnetic cores after assembly.
Fig. 3 is the schematic diagram for the modular construction that multistage New Type of Differential common mode filtering induction structure is formed.
In figure, the 1, first magnetic core；2, the second magnetic core；3, third magnetic core；4, the 4th magnetic core；
5, epoxy bottom plate；6, the first copper bar；7, the second copper bar；10, first through hole；20, the second through-hole；12, the first air gap；
30, third through-hole；40, fourth hole；34, interstice.
Specific implementation mode
It is detailed to a kind of New Type of Differential common mode filtering induction structure progress of the present invention with reference to the accompanying drawings of the specification
Explanation and illustration.
As shown in Figure 1, 2, 3, to solve only to be applicable in existing for existing filter inductance, low current occasion, consistency is poor, is difficult to
Batch production, the problems such as production cost is high, present embodiment discloses a kind of New Type of Differential common mode filtering induction structures, can effectively solve
Problems existing for the filter inductance of certainly existing ring core structure, are described as follows.
Poor common mode filtering induction structure disclosed in the present embodiment include the first magnetic core 1, the second magnetic core 2, third magnetic core 3,
4th magnetic core 4, the first copper bar 6 and the second copper bar 7；As shown in Figure 1, the first magnetic core 1 fits with the second magnetic core 2, after fitting, such as
Fig. 1, shown in 2, then first through hole 10 and the second through-hole 20 are formed simultaneously between the first magnetic core 1 and the second magnetic core 2, and first is logical
It is connected to by the first air gap 12 between hole 10 and the second through-hole 20；It is similar with the first, second core structure, third magnetic core 3 and
Four magnetic cores 4 fit, after fitting, as shown in Fig. 2, be formed simultaneously between third magnetic core 3 and the 4th magnetic core 4 third through-hole 30 and
Fourth hole 40, and be connected to by interstice 34 between third through-hole 30 and fourth hole 40；As shown in Figure 1, 2, the first magnetic
Core 1, the second magnetic core 2, third magnetic core 3 and the 4th magnetic core 4 are set gradually, and the second magnetic core 2 also fits with third magnetic core 3；To carry
High filter inductance respectively forms partial identity, convenient for element production, reduction production cost, and the present embodiment uses two secondary plane EE
Type magnetic core is as entire inductance core, and magnetic core side column does minute surface polishing (keeping fitting close), to improve inductance value, core center
Column opens air gap, and size of gaps is adjusted according to the differential mode inductance amount of galvanization situation and needs, wherein the first magnetic core 1 and
Two magnetic cores 2 form a secondary EE type magnetic cores, and the center of the EE type magnetic cores is provided with the first air gap 12,4 shape of third magnetic core 3 and the 4th magnetic core
At a secondary EE type magnetic cores, the center of the EE type magnetic cores is provided with interstice 34.More specifically, in technical side disclosed by the invention
On the basis of case, the magnetic materials of two secondary magnetic cores can lead that ferrite+height leads ferrite or height leads ferrite+high-frequency iron according to height
Oxysome is configured, and to realize different filtering characteristics, certainly, under the technical inspiration of the present embodiment, magnetic core can also be
The planar magnetic core of class E types also is available for using, and the first copper bar 6 and the second copper bar 7 are used to, as winding, have galvanization ability
By force, the advantages that being suitble to high current, the first copper bar 6 pass through the second through-hole 20 and fourth hole 40, the second copper bar 7 to pass through first through hole
10 and third through-hole 30；In the present embodiment, the first copper bar 6 and the second copper bar 7 are U-shaped, and copper bar type is red copper item, the first bronze medal
Two open ends of item 6 are each passed through the second through-hole 20 and fourth hole 40, and two open ends of the second copper bar 7 are each passed through first and lead to
Hole 10 and third through-hole 30；In addition, in order to ensure the insulation between copper bar and magnetic core, in the surface of the first copper bar 6 and the second bronze medal
The surface of item 7 is wound with Kapton.
To improve the reliability and autgmentability of New Type of Differential common mode filtering inductance made in accordance with the present invention, the difference common mode filtering
Induction structure further includes epoxy bottom plate 5, and the first magnetic core 1, the second magnetic core 2, third magnetic core 3, the 4th magnetic core 4 are both secured to epoxy
On bottom plate 5.In the present embodiment, the through-hole passed through for the first copper bar 6 and the second copper bar 7, and epoxy are provided on epoxy bottom plate 5
It is fixed using epoxide-resin glue between bottom plate 5 and each magnetic core, between epoxy bottom plate 5 and each copper bar.Specifically, epoxy
It is also opened on bottom plate 5 there are four groove, as shown in Figure 1,1 one end of the first magnetic core, 2 one end of the second magnetic core, 3 one end of third magnetic core, the
Four magnetic cores, 4 one end is inserted in successively in four grooves.In order to realize the modularization and autgmentability of poor common mode filtering inductance, the first magnetic
Core 1, the second magnetic core 2, third magnetic core 3, the 4th magnetic core 4, the first copper bar 6 and the second copper bar 7 form an inductance unit, a ring
Multiple inductance units are fixed on oxygen bottom plate 5；As shown in figure 3, fixing two inductance units on an epoxy chassis.
It is as follows according to New Type of Differential common mode filtering inductance operation principle made of the present embodiment：In common mode, two around
The common mode flux Φ CM that group generates cancel out each other on newel, and mutually reinforce in the magnetic core of outer ring, and it is dry to play suppression common mode
The effect disturbed.And it is then exactly the opposite under Differential mode, the different mode flux Φ DM that two windings generate are mutual in the magnetic core of outer ring
It offsets, and mutually reinforces on newel, to realize the effect inhibited to DM EMI signal.In view of the magnetic of DM EMI
It is logical to be generally all superimposed upon in the biasing of a high current the input or output current, it is saturated immediately when to avoid magnetic core from working, this reality
Example is applied to need to open air gap in newel, and the size of the air gap can then be adjusted according to the differential mode inductance amount of electric current and needs
It is whole.The air gap that the difference common mode inductance is opened according to copper bar and magnetic core, through-current capability can reach 100A or more.
In the present embodiment, the function of being inhibited is interfered to 30MHz or more high-frequency noises to realize, it can be by two secondary magnetic cores
Ferrite+high frequency ferrite is led according to height to be configured, wherein high ferrite of leading is MnZn materials, and high frequency ferrite is NiZn
Material.In this way, the difference common mode inductance can be enable in high frequency>30MHz or more still has preferable filter action.
In the present embodiment, in order to realize that power supply output inhibits low frequency differential mode noise, (for example Switching Power Supply is being lightly loaded
Or the low-frequency ripple noise of generation when discontinuous operation is carried out under no-load condition, such Ripple Noise inhibits to need compared with big inductance quantity,
But work when by electric current it is smaller), can also be combined with the magnetic core of two different air gap sizes, an air gap is big, one
A air gap is small.The differential mode inductance of that small magnetic core of air gap in this way is big, more preferable to low-frequency ripple noise suppression effect, but the inductance
Only unloaded or can work normally at light load, when electric power outputting current continues to increase, the small magnetic core of air gap can first be saturated mistake
It goes to act on, that inductance for still having air gap larger at this time can continue to provide differential mode filter effect.Thus can either it is unloaded,
Inhibit low-frequency ripple noise when being lightly loaded discontinuous operation, also can provide switch time differential mode noise in fully loaded High-current output
The effect of filtering.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；Can be that machinery connects
It connects, can also be electrical connection；It can be directly connected, can also can be indirectly connected through an intermediary in two elements
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the description of the present invention, it is to be understood that, term "center", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on ... shown in the drawings or
Position relationship is merely for convenience of description of the present invention and simplification of the description, and does not indicate or imply the indicated device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In the description of this specification, reference term " the present embodiment ", " one embodiment ", " some embodiments ", " show
The description of example ", " specific example " or " some examples " etc. mean specific features described in conjunction with this embodiment or example, structure,
Material or feature are included at least one embodiment or example of the invention.In the present specification, above-mentioned term is shown
The statement of meaning property is necessarily directed to identical embodiment or example.Moreover, specific features, structure, material or the spy of description
Point may be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other,
Those skilled in the art can be by different embodiments or examples described in this specification and different embodiments or examples
Feature is combined.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Any modification, equivalent replacement and simple modifications etc., should all be included in the protection scope of the present invention made by content.
Claims (10)
1. a kind of New Type of Differential common mode filtering induction structure, it is characterised in that：The difference common mode filtering induction structure includes the first magnetic core
(1), the second magnetic core (2), third magnetic core (3), the 4th magnetic core (4), the first copper bar (6) and the second copper bar (7)；First magnetic core (1)
It fits with the second magnetic core (2), first through hole is formed simultaneously between first magnetic core (1) and second magnetic core (2)
(10) and the second through-hole (20) it is connected to, and by the first air gap (12) between first through hole (10) and the second through-hole (20)；Third
Magnetic core (3) fits with the 4th magnetic core (4), and third is formed simultaneously between the third magnetic core (3) and the 4th magnetic core (4)
Through-hole (30) and fourth hole (40), and be connected to by interstice (34) between third through-hole (30) and fourth hole (40)；
First copper bar (6) and second copper bar (7) are used to as winding, and first copper bar (6) passes through the second through-hole
(20) and fourth hole (40), second copper bar (7) pass through first through hole (10) and third through-hole (30).
2. New Type of Differential common mode filtering induction structure according to claim 1, it is characterised in that：First magnetic core (1) and
Second magnetic core (2) forms a secondary EE type magnetic cores, and the center of the EE type magnetic cores is provided with the first air gap (12).
3. New Type of Differential common mode filtering induction structure according to claim 2, it is characterised in that：The third magnetic core (3) and
4th magnetic core (4) forms a secondary EE type magnetic cores, and the center of the EE type magnetic cores is provided with interstice (34).
4. the New Type of Differential common mode filtering induction structure according to any claim in claims 1 to 3, it is characterised in that：
First copper bar (6) and second copper bar (7) are U-shaped, and two open ends of the first copper bar (6) are each passed through the second through-hole
(20) and fourth hole (40), two open ends of the second copper bar (7) are each passed through first through hole (10) and third through-hole (30).
5. New Type of Differential common mode filtering induction structure according to claim 4, it is characterised in that：First copper bar (6)
Surface and the surface of second copper bar (7) are wound with Kapton.
6. New Type of Differential common mode filtering induction structure according to claim 5, it is characterised in that：First magnetic core (1), the second magnetic
Core (2), third magnetic core (3) and the 4th magnetic core (4) are set gradually, and second magnetic core (2) is also affixed with the third magnetic core (3)
It closes.
7. New Type of Differential common mode filtering induction structure according to claim 6, it is characterised in that：The difference common mode filtering inductance knot
Structure further includes epoxy bottom plate (5), and the first magnetic core (1), the second magnetic core (2), third magnetic core (3), the 4th magnetic core (4) are both secured to institute
It states on epoxy bottom plate (5).
8. New Type of Differential common mode filtering induction structure according to claim 7, it is characterised in that：On the epoxy bottom plate (5)
It is provided with the through-hole passed through for first copper bar (6) and second copper bar (7), between epoxy bottom plate (5) and each magnetic core, ring
It is fixed using epoxide-resin glue between oxygen bottom plate (5) and each copper bar.
9. New Type of Differential common mode filtering induction structure according to claim 8, it is characterised in that：On the epoxy bottom plate (5)
Groove there are four also opening, and the first magnetic core (1) one end, the second magnetic core (2) one end, third magnetic core (3) one end, the 4th magnetic core (4)
One end is inserted in successively in four grooves.
10. New Type of Differential common mode filtering induction structure according to claim 9, it is characterised in that：First magnetic core (1), second
Magnetic core (2), third magnetic core (3), the 4th magnetic core (4), the first copper bar (6) and the second copper bar (7) one inductance unit of formation, one
It is fixed with multiple inductance units on a epoxy bottom plate (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810210267.1A CN108492965A (en) | 2018-03-14 | 2018-03-14 | A kind of New Type of Differential common mode filtering induction structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810210267.1A CN108492965A (en) | 2018-03-14 | 2018-03-14 | A kind of New Type of Differential common mode filtering induction structure |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109285654A (en) * | 2018-10-24 | 2019-01-29 | 遂宁普思电子有限公司 | Common mode inductance |
| CN109411200A (en) * | 2018-12-15 | 2019-03-01 | 泰州市天力铁芯制造有限公司 | A kind of assembling iron core of high-tension transformer |
| CN111029095A (en) * | 2019-12-26 | 2020-04-17 | 杭州普晶电子科技有限公司 | Integrated integrated filter inductor |
| CN111415812A (en) * | 2019-01-07 | 2020-07-14 | 台达电子企业管理（上海）有限公司 | Coupling inductor and power module |
| WO2022246827A1 (en) * | 2021-05-28 | 2022-12-01 | 东莞顺络电子有限公司 | Inductor and manufacturing method therefor |
| US11676756B2 (en) | 2019-01-07 | 2023-06-13 | Delta Electronics (Shanghai) Co., Ltd. | Coupled inductor and power supply module |
| EP4312235A1 (en) * | 2022-07-25 | 2024-01-31 | Steward (Foshan) Magnetics Co., Ltd. | Emi magnetic bead inductor |
| US11909311B2 (en) | 2017-05-05 | 2024-02-20 | Delta Electronics (Shanghai) Co., Ltd | Power converter, inductor element and control method of phase shedding |
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