CN105101767B - Electromagnetic armouring structure and power transfer with electromagnetic armouring structure - Google Patents
Electromagnetic armouring structure and power transfer with electromagnetic armouring structure Download PDFInfo
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- CN105101767B CN105101767B CN201510382163.5A CN201510382163A CN105101767B CN 105101767 B CN105101767 B CN 105101767B CN 201510382163 A CN201510382163 A CN 201510382163A CN 105101767 B CN105101767 B CN 105101767B
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910052802 copper Inorganic materials 0.000 claims abstract description 36
- 239000010949 copper Substances 0.000 claims abstract description 36
- 241000446313 Lamella Species 0.000 claims description 8
- 229910000859 α-Fe Inorganic materials 0.000 claims description 5
- 230000005672 electromagnetic field Effects 0.000 claims description 3
- 230000005284 excitation Effects 0.000 claims description 3
- 230000006698 induction Effects 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000003313 weakening effect Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 241000784732 Lycaena phlaeas Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention discloses a kind of electromagnetic armouring structure and with the power transfer of electromagnetic armouring structure; by the way that the area of magnetic sheet layer to be set greater than to the area of copper sheet layer and/or the thickness of magnetic sheet layer is set greater than to the thickness of copper sheet layer; the area of space where magnetic sheet layer to allow more magnetic fields of induction coil surrounding space to be not covered with by copper sheet layer; it can guarantee that the intensity in magnetic field above induction coil will not be weakened by the magnetic field repulses effect of copper sheet layer in this way, while also achieve the purpose that protection is electrically charged equipment.
Description
Technical field
The present invention relates to wireless charging fields, more specifically, being related to a kind of electromagnetic armouring structure and having electromagnetic shielding
The power transfer of structure.
Background technique
The emerging technology that wireless charging technology is transmitted as electric energy, by the favor of electronics charging manufacturer, wireless charging
Electric installation is the transmission process that energy is realized using electromagnetic induction principle, and with high reliablity, safety is good and is easy to
The advantages that automatic charging, is widely used.Wireless charging device has generally included transmitting coil and receiving coil, and the two be every
From placement, at work, magnetic field is generated in the transmitting coil spatial dimension certain around, due to transmitting coil magnetic flux
High frequency variation, so that the receiving coil being located in magnetic field induces corresponding high-frequency electrical kinetic potential, to complete the wireless biography of energy
It is defeated.
In wireless charging device, in order to enhance the magnetic field above induction coil, improves electric energy transmitting coil and receive line
Transmitting coil and receiving coil are usually placed on a magnetic sheet by the coupling between circle, since the magnetic resistance of magnetic sheet is smaller, can be inhaled
Draw magnetic field, the field weakening in magnetic sheet lower space can be made in this way, to reduce magnetic field to the quilt being placed in below magnetic sheet
The influence of charging equipment.
For receiving coil one side, influence generally for further armoured magnetic field to equipment is electrically charged, in magnetic sheet
Lower section can also place one layer of sheet metal, such as copper sheet.High frequency magnetic field can generate vortex on copper sheet, be vortexed the opposing magnetic field of generation
Influence of the interference magnetic field to equipment is electrically charged further is offset, so that utmostly protection is electrically charged equipment.
As described above, magnetic sheet is because low magnetic resistance can attract magnetic field, copper sheet can generate vortex and repel magnetic field, although both
The influence of equipment can be electrically charged to lower section with armoured magnetic field, but if magnetic sheet and copper sheet shape or size design improper, copper
The magnetic field repulses effect of piece can weaken the magnetic field above induction coil simultaneously, influence in wireless charging device energy transmitting coil and
Coupling between receiving coil reduces efficiency.
Summary of the invention
The invention proposes a kind of electromagnetic armouring structure and with the power transfer of electromagnetic armouring structure, pass through setting
The area of magnetic sheet in receiving portion or the thickness for changing magnetic sheet are offset an influence with weakening copper sheet to magnetic field, in armoured magnetic field pair
While being electrically charged equipment interference, it is ensured that the intensity in magnetic field above induction coil.
A kind of electromagnetic armouring structure according to the present invention, including first screen layer and secondary shielding layer, the secondary shielding
Layer is placed under the first screen layer, the electromagnetic field of the first screen layer and secondary shielding layer to shielding space, to protect
Shield is placed in the electronic equipment under the secondary shielding layer；
Wherein, area of the area of the first screen layer greater than the secondary shielding layer and/or the first screen layer
Thickness be greater than the thickness of the secondary shielding layer, also, the length and width of the first screen layer is all larger than described second
The length and width of shielded layer.
Preferably, the length of the first screen layer is 1.01 to 2 times of the length of the secondary shielding layer；
The width of the first screen layer is 1.01 to 2 times of the width of the secondary shielding layer.
Further, the surface that the secondary shielding layer is in contact with the first screen layer is first surface, opposite
Another side is second surface, and the both ends of the first screen layer are along perpendicular to the second surface and to the direction of second surface
Bending extends.
Preferably, 2 to 100 times of the thickness with a thickness of the secondary shielding layer of the first screen layer.
A kind of power transfer with electromagnetic armouring structure according to the present invention, for powering to charging equipment, institute
Stating power transfer includes emitting portion and receiving portion,
The emitting portion includes transmitting coil, receives high-frequency alternating current to generate magnetic in certain spatial dimension
?；
The receiving portion includes receiving coil, the first screen layer to place the receiving coil and fits in institute
The secondary shielding layer of first screen layer placement is stated, the receiving coil obtains corresponding according to the magnetic field that the transmitting coil excites
High-frequency electrical kinetic potential charges after being converted by voltage to the charging equipment；
The magnetic field of the first screen layer and secondary shielding layer to shield the transmitting coil excitation, to be filled described in protection
Electric equipment, wherein the area of the first screen layer be greater than the secondary shielding layer area and/or the first screen layer
Thickness is greater than the thickness of the secondary shielding layer, also, the length and width of the first screen layer is all larger than second screen
Cover the length and width of layer.
Preferably, the length of the first screen layer is 1.01 to 2 times of the length of the secondary shielding layer；
The width of the first screen layer is 1.01 to 2 times of the width of the secondary shielding layer.
Further, the surface that the secondary shielding layer is in contact with the first screen layer is first surface, opposite
Another side is second surface, and the both ends of the first screen layer are along perpendicular to the second surface and to the direction of second surface
Bending extends.
Further, the first screen layer surrounds the marginal portion of the secondary shielding layer.
Preferably, 2 to 100 times of the thickness with a thickness of the secondary shielding layer of the first screen layer.
Preferably, the first screen layer is ferrite magnetic lamella, and the secondary shielding layer is copper sheet layer.
From the above, electromagnetic armouring structure of the invention and the power transfer with electromagnetic armouring structure, pass through by
The area of first screen layer (magnetic sheet layer) is set greater than the area of the secondary shielding layer (copper sheet layer) and/or shields first
The thickness of layer (magnetic sheet layer) is set greater than the thickness of the secondary shielding layer (copper sheet layer), to allow induction coil surrounding space
The magnetic sheet layer that is not covered with by copper sheet layer of more magnetic fields where area of space, can guarantee on induction coil in this way
The intensity in square magnetic field will not be weakened by the magnetic field repulses effect of copper sheet layer, while also reach the mesh that protection is electrically charged equipment
's.Scheme compared with the existing technology, guarantor of the power transfer with electromagnetic armouring structure of the invention to charging equipment
Protective function is more preferable, and energy transmission efficiency is higher.
Detailed description of the invention
Fig. 1 show the structure chart of the receiving portion of power transfer in the prior art；
Fig. 2 show the structure chart of the first embodiment of the receiving portion of power transfer according to the present invention；
Fig. 3 show the sectional view of structure shown in Fig. 2；
Fig. 4 show the sectional view of the second embodiment of the receiving portion of power transfer according to the present invention；
Fig. 5 show the sectional view of the 3rd embodiment of the receiving portion of power transfer according to the present invention.
Specific embodiment
Several preferred embodiments of the invention are described in detail below in conjunction with attached drawing, but the present invention is not restricted to
These embodiments.The present invention covers any substitution made on the essence and scope of the present invention, modification, equivalent method and side
Case.In order to make the public have thorough understanding to the present invention, it is described in detail in the following preferred embodiment of the present invention specific thin
Section, and the present invention can also be understood completely in description without these details for a person skilled in the art.
In the present invention, the power transfer is by taking wireless charging device as an example.Wireless charging device is produced in the course of work
Raw space magnetic field pair and the charging equipment of its close contact will cause damage, therefore, the magnetic field of induction coil in order to prevent
It causes electromagnetism to damage charging equipment, shielded layer is needed to be electromagnetically shielded charging equipment, the prior art as shown in Figure 1 is normal
Electromagnetic shielding scheme, receiving coil are placed on first screen layer (for example, ferrite magnetic lamella), then the second screen
It covers layer (for example, copper sheet layer) to be placed under first screen layer, is electrically charged equipment and is placed under secondary shielding layer.It is general next
It says, the area of magnetic sheet layer in the prior art is equal to the area of copper sheet layer, and the area of the two is to place completely
The receiving coil is suitable size, here the width of the two and to be equal in length.As described in background technique, magnetic sheet because
Magnetic field can be attracted for low magnetic resistance, copper sheet can generate vortex and repel magnetic field, in the spatial dimension that copper sheet and magnetic sheet are in contact, copper
The magnetic field that piece vortex generates can weaken the magnetic field around magnetic sheet, to reduce the efficiency of transmission of system.
The present inventor improves the shape of shielded layer and thickness etc. as a result, is asked with solve that space magnetic field is weakened
Topic.
The first reality of the receiving portion of the power transfer with shielding construction according to the present invention is shown with reference to Fig. 2
The structure chart of example is applied, in embodiments of the present invention, power transfer is still by taking wireless charging device as an example, the wireless charging Denso
Setting includes emitting portion and receiving portion, and the emitting portion includes transmitting coil, receives high-frequency alternating current certain
Spatial dimension in generate magnetic field, emitting portion is identical as technical solution in the prior art here, therefore is not shown；The receiving unit
Dividing includes receiving coil, the first screen layer (for example, magnetic sheet layer) to place the receiving coil, and is fitted in described
The secondary shielding layer (for example, copper sheet layer) that first screen layer is placed, the magnetic that the receiving coil is excited according to the transmitting coil
Field obtains corresponding high-frequency electrical kinetic potential, charges after being converted by voltage to the charging equipment, and the charging equipment is placed in copper
It is and consistent in Fig. 1 under lamella, therefore, it is not shown in Fig. 2.
The magnetic field of the first screen layer and secondary shielding layer to shield the transmitting coil excitation, is electrically charged with protection
Equipment, in the present embodiment, the area of the first screen layer are greater than the area of the secondary shielding layer, also, described first
The length and width of shielded layer is all larger than the length and width of the secondary shielding layer.In preferred embodiments, described first
The length of shielded layer is 1.01 to 2 times of the length of the secondary shielding layer；The width of the first screen layer is described second
1.01 to 2 times of the width of shielded layer, in this way, may make the surface of the first screen layer to be completely covered and be greater than described the
The surface of two shielded layers.
The sectional view of structure shown in Fig. 2 is shown with reference to Fig. 3, since the area of magnetic sheet layer is greater than the area of copper sheet, thus
In the horizontal direction, the space region that the more magnetic induction lines of induction coil surrounding space can be allowed to be not covered with by copper sheet layer
Domain, guarantee induction coil above magnetic field intensity will not because of copper sheet layer magnetic field repulses effect and weaken significantly, shielding magnetic
While the protection charging equipment of field, the utilization rate of energy is improved, system effectiveness improves.
The sectional view of the second embodiment of the receiving portion of power transfer according to the present invention is shown with reference to Fig. 4；
In the present embodiment, the thickness of the first screen layer is greater than the thickness of the secondary shielding layer.It should be noted that this implementation
In example, the area of the first screen layer is equal to the area of the secondary shielding layer.In preferred embodiments, first screen
Cover 2 to 100 times of the thickness with a thickness of the secondary shielding layer of layer, in general, common copper sheet layer with a thickness of 50um,
Therefore, the thickness of magnetic sheet layer is set as 100um between 5mm, skilled person will appreciate that, other required precisions compared with
In high situation, the thickness of the first screen layer can also be adjusted suitably.
Can significantly it find out from Fig. 4, since the thickness of magnetic sheet layer is much larger than the thickness of copper sheet layer, in Vertical Square
Upwards, the area of space that more magnetic induction lines of induction coil surrounding space can be made to be not covered with by copper sheet layer, this
Sample can guarantee magnetic field above induction coil intensity will not because of copper sheet layer magnetic field repulses effect and weaken, in armoured magnetic field
While protection is electrically charged equipment, the utilization rate of energy is improved, system effectiveness improves.
Skilled person will appreciate that above-mentioned two schemes can be combined with using for example, both having increased the face of magnetic sheet layer
Product also increases the thickness of magnetic sheet layer simultaneously, and user can be according to cost or space size unrestricted choice scheme.
The sectional view of the 3rd embodiment of the receiving portion of power transfer according to the present invention is shown with reference to Fig. 5；
The present embodiment is the further extension in embodiment shown in Fig. 2, remembers that the secondary shielding layer connects with the first screen layer
The surface of touching is first surface, and opposite another side is second surface, in the present embodiment, the both ends edge of the first screen layer
Perpendicular to the second surface and to the direction of second surface be bent extend, specifically, the first screen layer surround described in
The marginal portion of secondary shielding layer.
Magnetic sheet layer not only covers copper sheet sheaf space in the horizontal direction in the present embodiment, also surrounds in vertical direction same
The segment space of lamella, such as the magnetic induction line trend in Fig. 5 as can be seen that the ratio of the induction coil surrounding space of the embodiment of the present invention
Therefore the area of space for having more magnetic induction lines to be not covered in embodiment 2 by copper sheet layer further reduced copper sheet layer
Weakening effect, improve the efficiency of wireless power transmission.
Skilled person will appreciate that the scheme of the above embodiments two and the scheme of embodiment three, which can also combine, to be made
With, for example, both made the encirclement of magnetic sheet layer with the marginal portion of lamella while or increase magnetic sheet layer thickness.
Finally, it is readily appreciated that, under inspiration of the invention, those skilled in the art can be flexible in conjunction with above-mentioned three kinds of schemes
It is applied in combination or uses simultaneously, for example, making the area of magnetic sheet layer greater than the area of copper sheet layer in the horizontal direction, in vertical direction
On so that magnetic sheet layer is surrounded the part of copper sheet layer, while increasing the thickness of magnetic sheet layer, with the shield effectiveness and maximum being optimal
Efficiency of transmission.
The invention also provides a kind of electromagnetic armouring structure, including first screen layer and secondary shielding layer, second screen
It covers layer to place under the first screen layer, the electromagnetic field of the first screen layer and secondary shielding layer to shielding space, with
Protection is placed in the electronic equipment under the secondary shielding layer；Wherein, the area of the first screen layer is greater than described second
The area of shielded layer and/or the thickness of the first screen layer are greater than the thickness of the secondary shielding layer, here, first screen
The length and width for covering layer is all larger than the length and width of the secondary shielding layer.
Preferably, the length of the first screen layer is 1.01 to 2 times of length of the secondary shielding layer, described first
The width of shielded layer is 1.01 to 2 times of the width of the secondary shielding layer.
Preferably, the surface that the secondary shielding layer is in contact with the first screen layer is first surface, and opposite is another
It is on one side second surface, the both ends of the first screen layer are along curved perpendicular to the second surface and to the direction of second surface
Qu Yanshen.
Preferably, 2 to 100 times of the thickness with a thickness of the secondary shielding layer of the first screen layer.
In the embodiment of the present invention, the first screen layer and secondary shielding layer are metal screen layer, for example, first screen layer
It can be, but not limited to as ferrite magnetic lamella, secondary shielding layer can be, but not limited to as copper sheet layer.
It can equally guarantee first screen layer upper space magnetic field according to electromagnetic armouring structure set forth above, of the invention
Intensity will not because of secondary shielding layer magnetic field repulses effect and weaken, armoured magnetic field protect charging equipment while, mention
The high utilization rate of energy, system effectiveness improve.
The electromagnetic armouring structure to preferred embodiment according to the present invention and the electric energy with electromagnetic armouring structure pass above
Defeated device has carried out detailed description, and those of ordinary skill in the art can deduce other technologies or structure and circuit cloth accordingly
Office, element etc. can be applied to the embodiment.
It is as described above according to the embodiment of the present invention, these embodiments details all there is no detailed descriptionthe, also not
Limiting the invention is only the specific embodiment.Obviously, as described above, can make many modifications and variations.This explanation
These embodiments are chosen and specifically described to book, is principle and practical application in order to better explain the present invention, thus belonging to making
Technical field technical staff can be used using modification of the invention and on the basis of the present invention well.The present invention is only by right
The limitation of claim and its full scope and equivalent.
Claims (9)
1. a kind of electromagnetic armouring structure, which is characterized in that including first screen layer and secondary shielding layer, the secondary shielding layer is put
It sets under the first screen layer, the electromagnetic field of the first screen layer and secondary shielding layer to shielding space, is put with protection
The electronic equipment being placed under the secondary shielding layer；
Wherein, the area of the first screen layer is greater than the area of the secondary shielding layer and/or the thickness of the first screen layer
Degree is greater than the thickness of the secondary shielding layer, also, when the area of the first screen layer is greater than the face of the secondary shielding layer
When product, the length and width of the first screen layer is all larger than the length and width of the secondary shielding layer,
Wherein, the first screen layer is ferrite magnetic lamella, and the secondary shielding layer is copper sheet layer.
2. electromagnetic armouring structure according to claim 1, which is characterized in that the length of the first screen layer is described the
1.01 to 2 times of the length of two shielded layers；
The width of the first screen layer is 1.01 to 2 times of the width of the secondary shielding layer.
3. electromagnetic armouring structure according to claim 1, which is characterized in that the secondary shielding layer and first shielding
The surface that layer is in contact is first surface, and opposite another side is second surface, and the both ends of the first screen layer are along vertical
Extension is bent in the second surface and to the direction of second surface.
4. electromagnetic armouring structure according to claim 1, which is characterized in that the first screen layer with a thickness of described
2 to 100 times of the thickness of two shielded layers.
5. a kind of power transfer with electromagnetic armouring structure, for powering to charging equipment, the power transfer
It include emitting portion and receiving portion, which is characterized in that
The emitting portion includes transmitting coil, receives high-frequency alternating current to generate magnetic field in certain spatial dimension；
The receiving portion includes receiving coil, the first screen layer to place the receiving coil and fits in described
The secondary shielding layer that one shielded layer is placed, the receiving coil obtain corresponding high frequency according to the magnetic field that the transmitting coil excites
Electromotive force charges after being converted by voltage to the charging equipment；
The magnetic field of the first screen layer and secondary shielding layer to shield the transmitting coil excitation, to protect the charging to set
It is standby, wherein the area of the first screen layer is greater than the area of the secondary shielding layer and/or the thickness of the first screen layer
Greater than the thickness of the secondary shielding layer, also, when the area of the first screen layer is greater than the area of the secondary shielding layer
The length and width of the first screen layer is all larger than the length and width of the secondary shielding layer,
Wherein, the first screen layer is ferrite magnetic lamella, and the secondary shielding layer is copper sheet layer.
6. power transfer according to claim 5, which is characterized in that the length of the first screen layer is described the
1.01 to 2 times of the length of two shielded layers；
The width of the first screen layer is 1.01 to 2 times of the width of the secondary shielding layer.
7. power transfer according to claim 5, which is characterized in that the secondary shielding layer and first shielding
The surface that layer is in contact is first surface, and opposite another side is second surface, and the both ends of the first screen layer are along vertical
Extension is bent in the second surface and to the direction of second surface.
8. power transfer according to claim 7, which is characterized in that the first screen layer surrounds second screen
Cover the marginal portion of layer.
9. power transfer according to claim 5, which is characterized in that the first screen layer with a thickness of described
2 to 100 times of the thickness of two shielded layers.
Priority Applications (1)
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| CN201510382163.5A CN105101767B (en) | 2015-07-02 | 2015-07-02 | Electromagnetic armouring structure and power transfer with electromagnetic armouring structure |
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| CN201510382163.5A CN105101767B (en) | 2015-07-02 | 2015-07-02 | Electromagnetic armouring structure and power transfer with electromagnetic armouring structure |
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| CN105101767B true CN105101767B (en) | 2019-04-09 |
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| CN105375649B (en) * | 2015-12-13 | 2020-08-11 | 宁波微鹅电子科技有限公司 | Integrated circuit with wireless power receiving structure and integration method |
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| CN108123523A (en) * | 2017-12-27 | 2018-06-05 | 中惠创智无线供电技术有限公司 | A kind of sending device of wireless charging, reception device and wireless charging system |
| CN111586960B (en) * | 2019-02-15 | 2021-09-14 | 华为技术有限公司 | Anti-interference circuit board and terminal |
| CN110289046B (en) * | 2019-06-26 | 2024-08-09 | 浙江诺尔康神经电子科技股份有限公司 | An electric field shielding device that does not affect the transmission efficiency of wireless coupling transmission coil |
| CN111669926B (en) * | 2020-05-22 | 2021-09-17 | 台达电子企业管理（上海）有限公司 | Electromagnetic field transmitting and receiving device and wireless charging device |
| US12014857B2 (en) * | 2020-06-19 | 2024-06-18 | Apple Inc. | Wireless charging system with a switchable magnetic core |
| CN114743753B (en) * | 2022-02-24 | 2025-01-03 | 华为数字能源技术有限公司 | Alternating magnetic field coupling system, magnetic field generating device and magnetic field receiving device |
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