CN204810806U - Electromagnetic shield structure and power transfer device who has electromagnetic shield structure - Google Patents
Electromagnetic shield structure and power transfer device who has electromagnetic shield structure Download PDFInfo
- Publication number
- CN204810806U CN204810806U CN201520488021.2U CN201520488021U CN204810806U CN 204810806 U CN204810806 U CN 204810806U CN 201520488021 U CN201520488021 U CN 201520488021U CN 204810806 U CN204810806 U CN 204810806U
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- screen
- shielding layer
- secondary shielding
- thickness
- power transfer
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Abstract
The utility model discloses an electromagnetic shield structure and power transfer device who has electromagnetic shield structure, it sets up the thickness for being greater than the copper sheet layer for the area that is greater than the copper sheet layer and/or with the thickness on magnetic sheet layer to set up through the area with the magnetic sheet layer, thereby make the space at the magnetic sheet layer place that more magnetic field of induction coil space around did not cover through the copper sheet layer regional, the intensity that can guarantee induction coil top magnetic field like this can not be by the magnetic field repelling effect on copper sheet layer and weaken, the protection has also been reached simultaneously by the mesh of battery charging outfit.
Description
Technical field
The utility model relates to wireless charging field, in particular, relates to a kind of electromagnetic armouring structure and has the power transfer of electromagnetic armouring structure.
Background technology
Wireless charging technology is as an emerging technology of delivery of electrical energy, be subject to the favor of electronics charging manufacturer, wireless charging device utilizes electromagnetic induction principle to realize the transmitting procedure of energy, and it has that reliability is high, fail safe good and be easy to the advantages such as automatic charging and is widely used.Wireless charging device has generally included transmitting coil and receiving coil, and both are isolation placements, at work, magnetic field is produced in the spatial dimension that transmitting coil is certain around, because the high frequency of transmitting coil magnetic flux changes, make the receiving coil being arranged in magnetic field induce corresponding high-frequency electrical kinetic potential, thus complete the wireless transmission of energy.
In wireless charging device, in order to strengthen the magnetic field above induction coil, improve the coupling between electric energy transmitting coil and receiving coil, usually transmitting coil and receiving coil are placed on a magnetic sheet, because the magnetic resistance of magnetic sheet is smaller, can magnetic field be attracted, the field weakening in magnetic sheet underlying space can be made like this, thus reduce magnetic field on be positioned over below magnetic sheet by the impact of charging device.
For receiving coil on one side, generally for further armoured magnetic field to by the impact of charging device, below magnetic sheet, also can place layer of metal sheet, as copper sheet etc.High frequency magnetic field can produce eddy current on copper sheet, and disturbing magnetic field is offset further on by the impact of charging device in the opposing magnetic field that eddy current produces, thus at utmost protect by charging device.
As mentioned above, magnetic sheet is because low magnetic resistance can attract magnetic field, copper sheet can produce eddy current and repel magnetic field, although both can armoured magnetic field on below by the impact of charging device, if but magnetic sheet and copper sheet shape or size design improper, the magnetic field repulses effect of copper sheet can weaken the magnetic field above induction coil simultaneously, affects the coupling between energy transmitting coil and receiving coil in wireless charging device, reduces efficiency.
Utility model content
The utility model proposes a kind of electromagnetic armouring structure and there is the power transfer of electromagnetic armouring structure, by arranging the area of the magnetic sheet in receiving unit or changing the thickness of magnetic sheet to weaken copper sheet offsetting an influence to magnetic field, at armoured magnetic field to while being disturbed by charging device, the intensity in magnetic field above induction coil can be ensured.
According to a kind of electromagnetic armouring structure of the present utility model, comprise the first screen and secondary shielding layer, described secondary shielding layer is placed under described first screen, described first screen and secondary shielding layer in order to the electromagnetic field of shielding space, to protect the electronic equipment be positioned under described secondary shielding layer;
Wherein, the thickness of area and/or described first screen that the area of described first screen is greater than described secondary shielding layer is greater than the thickness of described secondary shielding layer, further, the length of described first screen and width are all greater than length and the width of described secondary shielding layer.
Preferably, the length of described first screen is 1.01 to 2 times of the length of described secondary shielding layer;
The width of described first screen is 1.01 to 2 times of the width of described secondary shielding layer.
Further, the surface that described secondary shielding layer contacts with described first screen is first surface, and relative another side is second surface, and the two ends of described first screen extend along bending perpendicular to described second surface and to the direction of second surface.
Preferably, the thickness of described first screen is 2 to 100 times of the thickness of described secondary shielding layer.
According to a kind of power transfer with electromagnetic armouring structure of the present utility model, for powering to charging device, described power transfer includes radiating portion and receiving unit,
Described radiating portion comprises transmitting coil, and it receives high-frequency alternating current to produce magnetic field in certain spatial dimension;
Described receiving unit comprises receiving coil, in order to place the first screen of described receiving coil and to fit in the secondary shielding layer of described first screen placement, the magnetic field that described receiving coil excites according to described transmitting coil obtains corresponding high-frequency electrical kinetic potential, by giving the charging of described charging device after voltage transitions;
The magnetic field that described first screen and secondary shielding layer excite in order to shield described transmitting coil; to protect described charging device; wherein; the thickness of area and/or described first screen that the area of described first screen is greater than described secondary shielding layer is greater than the thickness of described secondary shielding layer; further, the length of described first screen and width are all greater than length and the width of described secondary shielding layer.
Preferably, the length of described first screen is 1.01 to 2 times of the length of described secondary shielding layer;
The width of described first screen is 1.01 to 2 times of the width of described secondary shielding layer.
Further, the surface that described secondary shielding layer contacts with described first screen is first surface, and relative another side is second surface, and the two ends of described first screen extend along bending perpendicular to described second surface and to the direction of second surface.
Further, described first screen surrounds the marginal portion of described secondary shielding layer.
Preferably, the thickness of described first screen is 2 to 100 times of the thickness of described secondary shielding layer.
Preferably, described first screen is ferrite magnetic lamella, and described secondary shielding layer is copper sheet layer.
From the above, electromagnetic armouring structure of the present utility model and there is the power transfer of electromagnetic armouring structure, by the area of the first screen (magnetic sheet layer) being set to be greater than the area of described secondary shielding layer (copper sheet layer) and/or be set to the thickness of the first screen (magnetic sheet layer) to be greater than the thickness of described secondary shielding layer (copper sheet layer), thus the area of space at the magnetic sheet layer place allowing the more magnetic field of induction coil surrounding space do not covered by copper sheet layer, can ensure that the intensity in magnetic field above induction coil can not be weakened by the magnetic field repulses effect of copper sheet layer like this, also reach protection by the object of charging device simultaneously.Relative to the scheme of prior art, the power transfer with electromagnetic armouring structure of the present utility model is better to the defencive function of charging device, and energy transmission efficiency is higher.
Accompanying drawing explanation
Figure 1 shows that the structure chart of the receiving unit of power transfer of the prior art;
Figure 2 shows that the structure chart of the first embodiment of the receiving unit according to power transfer of the present utility model;
Figure 3 shows that the profile of structure shown in Fig. 2;
Figure 4 shows that the profile of the second embodiment of the receiving unit according to power transfer of the present utility model;
Figure 5 shows that the profile of the 3rd embodiment of the receiving unit according to power transfer of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, several preferred embodiment of the present utility model is described in detail, but the utility model is not restricted to these embodiments.The utility model contain any make on marrow of the present utility model and scope substitute, amendment, equivalent method and scheme.To have the utility model to make the public and understand thoroughly, in following the utility model preferred embodiment, describe concrete details in detail, and do not have the description of these details also can understand the utility model completely for a person skilled in the art.
In the utility model, described power transfer is for wireless charging device.The charging device of space magnetic field that wireless charging device produces in the course of work pair and its close contact can cause damage, therefore, electromagnetism is caused to damage to prevent the magnetic field of induction coil to charging device, screen is needed to carry out electromagnetic shielding to charging device, the electromagnetic shielding scheme that prior art is as shown in Figure 1 conventional, receiving coil is positioned on the first screen (being such as ferrite magnetic lamella), then secondary shielding layer (being such as copper sheet layer) is positioned under the first screen, is positioned under secondary shielding layer by charging device.In general, the area of magnetic sheet layer of the prior art is set to the area equaling copper sheet layer, and both areas are for can to place described receiving coil be completely suitable size, is both width and identical length etc. here.As said in background technology, magnetic sheet is because low magnetic resistance can attract magnetic field, and copper sheet can produce eddy current and repel magnetic field, in the spatial dimension that copper sheet and magnetic sheet contact, the magnetic field that copper sheet eddy current produces can weaken the magnetic field around magnetic sheet, thus reduces the efficiency of transmission of system.
Thus, the utility model people improves to solve the weakened problem of space magnetic field to the shape of screen and thickness etc.
With reference to Figure 2 shows that according to the structure chart with the first embodiment of the receiving unit of the power transfer of shielding construction of the present utility model, in the utility model embodiment, power transfer is still for wireless charging device, described wireless charging device includes radiating portion and receiving unit, described radiating portion comprises transmitting coil, it receives high-frequency alternating current to produce magnetic field in certain spatial dimension, and radiating portion is identical with technical scheme in prior art here, therefore not shown; Described receiving unit comprises receiving coil, in order to place first screen (being such as magnetic sheet layer) of described receiving coil, and fit in the secondary shielding layer (being such as copper sheet layer) of described first screen placement, the magnetic field that described receiving coil excites according to described transmitting coil obtains corresponding high-frequency electrical kinetic potential, by giving the charging of described charging device after voltage transitions, described charging device is positioned under copper sheet layer, consistent with Fig. 1, therefore, not shown in fig. 2.
The magnetic field that described first screen and secondary shielding layer excite in order to shield described transmitting coil; with protection by charging device; in the present embodiment; the area of described first screen is greater than the area of described secondary shielding layer; further, the length of described first screen and width are all greater than length and the width of described secondary shielding layer.In preferred embodiments, the length of described first screen is 1.01 to 2 times of the length of described secondary shielding layer; The width of described first screen is 1.01 to 2 times of the width of described secondary shielding layer, like this, the surface of described first screen can be made to cover completely and be greater than the surface of described secondary shielding layer.
With reference to the profile that Figure 3 shows that structure shown in Fig. 2; area due to magnetic sheet layer is greater than the area of copper sheet; thus in the horizontal direction; can allow the area of space that the more magnetic induction line of induction coil surrounding space is not covered by copper sheet layer; ensure that the intensity in magnetic field above induction coil can not weaken greatly because of the magnetic field repulses effect of copper sheet layer; while armoured magnetic field protection charging device, improve the utilance of energy, system effectiveness improves.
Reference Figure 4 shows that the profile of the second embodiment of the receiving unit according to power transfer of the present utility model; In the present embodiment, the thickness of described first screen is greater than the thickness of described secondary shielding layer.It should be noted that, in the present embodiment, the area of described first screen equals the area of described secondary shielding layer.In preferred embodiments, the thickness of described first screen is 2 to 100 times of the thickness of described secondary shielding layer, in general, the thickness of conventional copper sheet layer is 50um, therefore, the thickness of magnetic sheet layer is set between 100um to 5mm, and those skilled in the art are known, in the higher situation of other required precisions, the thickness of described first screen can also suitably regulate.
Can significantly find out from Fig. 4; because the thickness of magnetic sheet layer is much larger than the thickness of copper sheet layer; therefore; in vertical direction; the area of space that the more magnetic induction line of induction coil surrounding space can be made not covered by copper sheet layer, can ensure that the intensity in magnetic field above induction coil can not weaken because of the magnetic field repulses effect of copper sheet layer like this, while armoured magnetic field protection is by charging device; improve the utilance of energy, system effectiveness improves.
Those skilled in the art are known, and above-mentioned two schemes can also be combined, and such as, the area both having increased magnetic sheet layer also increases the thickness of magnetic sheet layer simultaneously, and user can according to cost or space size unrestricted choice scheme.
Reference Figure 5 shows that the profile of the 3rd embodiment of the receiving unit according to power transfer of the present utility model; The present embodiment is the further extension on embodiment illustrated in fig. 2, remember that the surface that described secondary shielding layer contacts with described first screen is first surface, relative another side is second surface, in the present embodiment, the two ends of described first screen extend along bending perpendicular to described second surface and to the direction of second surface, concrete, described first screen surrounds the marginal portion of described secondary shielding layer.
In the present embodiment, magnetic sheet layer not only covers copper sheet sheaf space in the horizontal direction, also the segment space of same lamella is surrounded in vertical direction, as the magnetic induction line trend in Fig. 5 can be found out, the area of space having more magnetic induction line not covered by copper sheet layer in the ratio embodiment 2 of the induction coil surrounding space of the utility model embodiment, therefore, reduce further the weaken effect of copper sheet layer, improve the efficiency of wireless power transmission.
Those skilled in the art are known, and the scheme of the above embodiments two and the scheme of embodiment three also can be combined, and such as, both made the encirclement of magnetic sheet layer also increase the thickness of magnetic sheet layer with the marginal portion of lamella simultaneously.
Finally, easy understand, under inspiration of the present utility model, those skilled in the art can use in conjunction with above-mentioned three kinds of scheme flexible combination or use simultaneously, such as, make the area of magnetic sheet layer be greater than the area of copper sheet layer in the horizontal direction, make magnetic sheet layer surround the part of copper sheet layer in vertical direction, increase the thickness of magnetic sheet layer, to reach optimum shield effectiveness and maximum efficiency of transmission simultaneously.
The utility model also proposed a kind of electromagnetic armouring structure, comprise the first screen and secondary shielding layer, described secondary shielding layer is placed under described first screen, described first screen and secondary shielding layer in order to the electromagnetic field of shielding space, to protect the electronic equipment be positioned under described secondary shielding layer; Wherein, the thickness of area and/or described first screen that the area of described first screen is greater than described secondary shielding layer is greater than the thickness of described secondary shielding layer, here, the length of described first screen and width are all greater than length and the width of described secondary shielding layer.
Preferably, the length of described first screen is 1.01 to 2 times of the length of described secondary shielding layer, and the width of described first screen is 1.01 to 2 times of the width of described secondary shielding layer.
Preferably, the surface that described secondary shielding layer contacts with described first screen is first surface, and relative another side is second surface, and the two ends of described first screen extend along bending perpendicular to described second surface and to the direction of second surface.
Preferably, the thickness of described first screen is 2 to 100 times of the thickness of described secondary shielding layer.
In the utility model embodiment, described first screen and secondary shielding layer are metal screen layer, and such as, the first screen can be, but not limited to as ferrite magnetic lamella, and secondary shielding layer can be, but not limited to as copper sheet layer.
According to elaboration above; electromagnetic armouring structure of the present utility model can ensure that the intensity in the first screen superjacent air space magnetic field can not weaken because of the magnetic field repulses effect of secondary shielding layer equally; while armoured magnetic field protection charging device; improve the utilance of energy, system effectiveness improves.
Carried out detailed description to according to the electromagnetic armouring structure of preferred embodiment of the present utility model and the power transfer with electromagnetic armouring structure above, those of ordinary skill in the art can know other technologies or structure and circuit layout, element etc. accordingly by inference and all can be applicable to described embodiment.
According to embodiment of the present utility model as described above, these embodiments do not have all details of detailed descriptionthe, do not limit the specific embodiment that this utility model is only described yet.Obviously, according to above description, can make many modifications and variations.This specification is chosen and is specifically described these embodiments, is to explain principle of the present utility model and practical application better, thus makes art technical staff that the utility model and the amendment on the utility model basis can be utilized well to use.The utility model is only subject to the restriction of claims and four corner and equivalent.
Claims (10)
1. an electromagnetic armouring structure, it is characterized in that, comprise the first screen and secondary shielding layer, described secondary shielding layer is placed under described first screen, described first screen and secondary shielding layer in order to the electromagnetic field of shielding space, to protect the electronic equipment be positioned under described secondary shielding layer;
Wherein, the thickness of area and/or described first screen that the area of described first screen is greater than described secondary shielding layer is greater than the thickness of described secondary shielding layer, further, the length of described first screen and width are all greater than length and the width of described secondary shielding layer.
2. electromagnetic armouring structure according to claim 1, is characterized in that, the length of described first screen is 1.01 to 2 times of the length of described secondary shielding layer;
The width of described first screen is 1.01 to 2 times of the width of described secondary shielding layer.
3. electromagnetic armouring structure according to claim 1, it is characterized in that, the surface that described secondary shielding layer contacts with described first screen is first surface, relative another side is second surface, and the two ends of described first screen extend along bending perpendicular to described second surface and to the direction of second surface.
4. electromagnetic armouring structure according to claim 1, is characterized in that, the thickness of described first screen is 2 to 100 times of the thickness of described secondary shielding layer.
5. have a power transfer for electromagnetic armouring structure, for powering to charging device, described power transfer includes radiating portion and receiving unit, it is characterized in that,
Described radiating portion comprises transmitting coil, and it receives high-frequency alternating current to produce magnetic field in certain spatial dimension;
Described receiving unit comprises receiving coil, in order to place the first screen of described receiving coil and to fit in the secondary shielding layer of described first screen placement, the magnetic field that described receiving coil excites according to described transmitting coil obtains corresponding high-frequency electrical kinetic potential, by giving the charging of described charging device after voltage transitions;
The magnetic field that described first screen and secondary shielding layer excite in order to shield described transmitting coil; to protect described charging device; wherein; the thickness of area and/or described first screen that the area of described first screen is greater than described secondary shielding layer is greater than the thickness of described secondary shielding layer; further, the length of described first screen and width are all greater than length and the width of described secondary shielding layer.
6. power transfer according to claim 5, is characterized in that, the length of described first screen is 1.01 to 2 times of the length of described secondary shielding layer;
The width of described first screen is 1.01 to 2 times of the width of described secondary shielding layer.
7. power transfer according to claim 5, it is characterized in that, the surface that described secondary shielding layer contacts with described first screen is first surface, relative another side is second surface, and the two ends of described first screen extend along bending perpendicular to described second surface and to the direction of second surface.
8. power transfer according to claim 7, is characterized in that, described first screen surrounds the marginal portion of described secondary shielding layer.
9. power transfer according to claim 5, is characterized in that, the thickness of described first screen is 2 to 100 times of the thickness of described secondary shielding layer.
10. power transfer according to claim 5, is characterized in that, described first screen is ferrite magnetic lamella, and described secondary shielding layer is copper sheet layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520488021.2U CN204810806U (en) | 2015-07-02 | 2015-07-02 | Electromagnetic shield structure and power transfer device who has electromagnetic shield structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520488021.2U CN204810806U (en) | 2015-07-02 | 2015-07-02 | Electromagnetic shield structure and power transfer device who has electromagnetic shield structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204810806U true CN204810806U (en) | 2015-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520488021.2U Withdrawn - After Issue CN204810806U (en) | 2015-07-02 | 2015-07-02 | Electromagnetic shield structure and power transfer device who has electromagnetic shield structure |
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| CN (1) | CN204810806U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105101767A (en) * | 2015-07-02 | 2015-11-25 | 宁波微鹅电子科技有限公司 | Electromagnetic shielding structure and power transmission device with same |
| US11062841B2 (en) | 2017-12-05 | 2021-07-13 | Ningbo Weie Electronics Technology Ltd. | Electromagnetic shield device, wireless charging transmitting terminal, wireless charging receiving terminal and system |
-
2015
- 2015-07-02 CN CN201520488021.2U patent/CN204810806U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105101767A (en) * | 2015-07-02 | 2015-11-25 | 宁波微鹅电子科技有限公司 | Electromagnetic shielding structure and power transmission device with same |
| CN105101767B (en) * | 2015-07-02 | 2019-04-09 | 宁波微鹅电子科技有限公司 | Electromagnetic armouring structure and power transfer with electromagnetic armouring structure |
| US11062841B2 (en) | 2017-12-05 | 2021-07-13 | Ningbo Weie Electronics Technology Ltd. | Electromagnetic shield device, wireless charging transmitting terminal, wireless charging receiving terminal and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151125 Effective date of abandoning: 20190409 |