CN110233525A - A kind of magnetic shielding device - Google Patents
A kind of magnetic shielding device Download PDFInfo
- Publication number
- CN110233525A CN110233525A CN201910636548.8A CN201910636548A CN110233525A CN 110233525 A CN110233525 A CN 110233525A CN 201910636548 A CN201910636548 A CN 201910636548A CN 110233525 A CN110233525 A CN 110233525A
- Authority
- CN
- China
- Prior art keywords
- magnetic
- receiving coil
- shielding device
- magnetic shielding
- ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 125000004122 cyclic group Chemical group 0.000 claims abstract description 22
- 239000002159 nanocrystal Substances 0.000 claims description 7
- 230000005674 electromagnetic induction Effects 0.000 abstract description 6
- 239000002184 metal Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000005389 magnetism Effects 0.000 description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect 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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
Abstract
The invention discloses a kind of magnetic shielding devices, since the cyclic annular internal diameter every magnetic device in magnetic shielding device is not less than the outer diameter of receiving coil, in such cases, ring-type can be in the magnetic field positioned at receiving coil periphery for isolating out transmitting coil generation every magnetic device, it simultaneously will not be to the magnetic fields being located inside receiving coil, under the premise of not influencing electromagnetic induction work, it can be avoided the metal device around receiving coil to generate vortex and generate heat, also it avoids because charging rate declines caused by the temperature protection mechanism of triggering electronic product, improve charging rate.
Description
Technical field
The present invention relates to electromagnetic induction fields, more particularly to a kind of magnetic shielding device.
Background technique
Wireless charging technology just rapidly develops at present, and what wireless charging generallyd use is electromagnetic induction technology, i.e. emission lines
Alternating current can be led in circle to generate changing magnetic field, and the receiving coil being located in variation magnetic field can incude generation exchange
Electricity, the magnetic field range that transmitting coil generates is larger, although transmitting coil periphery magnetic field strength is relatively low, but it still can
So that the metal device in electronic product positioned at receiving coil periphery generates vortex to heat up, it is easy to trigger electronic product
Temperature protection mechanism is to reduce charging rate.
Therefore, how to provide a kind of scheme of solution above-mentioned technical problem is that those skilled in the art need to solve at present
Problem.
Summary of the invention
The object of the present invention is to provide a kind of magnetic shielding devices can keep away under the premise of not influencing electromagnetic induction work
Exempt from the metal device around receiving coil to generate vortex and generate heat, also avoids the temperature protection machine because of triggering electronic product
Charging rate declines caused by system, improves charging rate.
In order to solve the above technical problems, the present invention provides a kind of magnetic shielding devices, comprising:
The ring-type between the transmitting coil and receiving coil of wireless charger is coaxially disposed every magnetic device, for being isolated
Fall the magnetic field positioned at the receiving coil periphery that the transmitting coil generates；
The fixation device being connect with the ring-type every magnetic device, for fixing the ring-type every magnetic device；
Wherein, the cyclic annular internal diameter every magnetic device is not less than the outer diameter of the receiving coil.
Preferably, the ring-type includes that several pieces of magnetic screens annularly arranged are pasted every magnetic device.
Preferably, the magnetic screen patch is ferroxcube magnetic sheet.
Preferably, the cyclic annular internal diameter every magnetic device is greater than the outer diameter preset value of the receiving coil.
Preferably, the preset value is the 10% of the receiving coil outer diameter.
Preferably, the quantity of the magnetic screen patch and size are by emulating the quantity and institute in default cost
The corresponding relationship stated between size and the transmitting coil and the coefficient of coup of the receiving coil obtains.
Preferably, the magnetic screen patch is nanocrystal diskette.
Preferably, the shape of the magnetic screen patch is fan annular.
The present invention provides a kind of magnetic shielding devices, since the cyclic annular internal diameter every magnetic device in magnetic shielding device is not less than
The outer diameter of receiving coil, it is in such cases, cyclic annular to be located at receiving coil isolate out transmitting coil generation every magnetic device
The magnetic field of periphery, while electromagnetic induction work will not influenced to the magnetic fields being located inside receiving coil
Under the premise of, it can be avoided the metal device around receiving coil and generate vortex and generate heat, also avoid because triggering electronics produces
Charging rate declines caused by the temperature protection mechanism of product, improves charging rate.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of structural schematic diagram of magnetic shielding device provided by the invention；
Fig. 2 is the structural schematic diagram of another magnetic shielding device provided by the invention.
Specific embodiment
Core of the invention is to provide a kind of magnetic shielding device, under the premise of not influencing electromagnetic induction work, can keep away
Exempt from the metal device around receiving coil to generate vortex and generate heat, also avoids the temperature protection machine because of triggering electronic product
Charging rate declines caused by system, improves charging rate.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to FIG. 1, Fig. 1 is a kind of structural schematic diagram of magnetic shielding device provided by the invention, comprising:
Be coaxially disposed it is cyclic annular every magnetic device 1 between the transmitting coil and receiving coil of wireless charger, for every
From the magnetic field positioned at receiving coil periphery for falling transmitting coil generation；
The fixation device 2 being connect with ring-type every magnetic device 1, for stationary ring every magnetic device 1；
Wherein, the cyclic annular internal diameter every magnetic device 1 is not less than the outer diameter of receiving coil.
Specifically, cyclic annular have the effect of completely cutting off magnetic field every magnetic device 1, can use it is a plurality of types of every magnetic material,
The embodiment of the present invention is it is not limited here.
Specifically, since ring-type is between the coaxial arrangement of magnetic device 1 and transmitting coil and receiving coil, and it is cyclic annular every magnetic dress
The internal diameter for setting 1 is not less than the outer diameter of receiving coil, therefore the magnetic field positioned at receiving coil outer ring that transmitting coil generates can be by
Ring-type is masked every magnetic device 1, at the same will not influence it is cyclic annular every 1 internal diameter of magnetic device with the magnetic field in inner range, and it is cyclic annular
Receiving coil induction can be made to generate alternating current with the magnetic field in inner range every 1 internal diameter of magnetic device.
Wherein, the cyclic annular outer diameter size every magnetic device 1 can independently be set according to actual needs, certainly, outer diameter
Size and cost and shield effectiveness have corresponding relationship, and it is big can to find optimal outer diameter by seeking corresponding relationship therein
Small, the embodiment of the present invention is it is not limited here.
Specifically, since magnetic shielding material is usually softer state, in order to prevent it is cyclic annular every 1 arbitrary deformation of magnetic device and
The damage that may cause, fixed device 2 can with stationary ring every magnetic device 1, so that user easily moves, protect it is cyclic annular every
Magnetic device 1 will not be damaged easily.
Wherein, fixed device 2 can be multiple types, and the embodiment of the present invention is it is not limited here.
Referring to FIG. 2, Fig. 2 is the structural schematic diagram of another magnetic shielding device provided by the invention, in above-described embodiment
On the basis of:
Embodiment as one preferred, it is cyclic annular to be pasted every magnetic device 1 including several pieces of magnetic screens annularly arranged.
Specifically, several pieces of magnetic screens patch of cyclic annular arrangement is due to being not continuously, relative to continuous ring-type
For magnetic device 1, cost is saved, and simple production process is pasted in block-like magnetic screen, saves process costs.
Wherein, several pieces of magnetic screen patches can uniformly and without overlapping arrange circlewise, avoid the waste of material.
Certainly, other than above-mentioned pattern, cyclic annular every magnetic device 1 can also be other types, and the embodiment of the present invention is herein not
It limits.
Embodiment as one preferred, magnetic screen patch are ferroxcube magnetic sheet.
Specifically, ferrite has many advantages, such as that magnetism isolating effect is good, at low cost and durability degree is high.
Certainly, other than ferrite, magnetic screen patch can also be other types, and the embodiment of the present invention is it is not limited here.
Embodiment as one preferred, the cyclic annular internal diameter every magnetic device 1 are greater than the outer diameter preset value of receiving coil.
Specifically, in view of needing electronic product when user charges to electronic product using wireless charger
Receiving coil where position be fitted in the coaxial position of magnetic shielding device, user is virtually impossible to every time completely same
Electronic equipment is placed to axis, if the cyclic annular internal diameter every magnetic device 1 is equal to the outer diameter of receiving coil, then ring-type is every magnetic device
1 will isolate out the magnetic field inside receiving coil, affect charging effect, waste the energy, therefore the embodiment of the present invention
The middle outer diameter preset value that ring-type is greater than to receiving coil every the internal diameter of magnetic device 1, in such cases, user is placing electronic equipment
When can have certain redundancy placement space, even if place be not it is completely coaxial, will not allow cyclic annular filling every magnetic
It sets 1 and isolates out the magnetic field inside receiving coil to influence charging effect.
Embodiment as one preferred, preset value are the 10% of receiving coil outer diameter.
Specifically, set receiving coil outer diameter for preset value 10% both can be empty to the certain redundant operation of user
Between, it is also ensured that Magnetic Shielding Effectiveness.
Certainly, other than the 10% of receiving coil outer diameter, preset value can also be other values, and the embodiment of the present invention is herein
Without limitation.
Embodiment as one preferred, the quantity and size of magnetic screen patch are by emulating quantity in default cost
And the corresponding relationship between size and transmitting coil and the coefficient of coup of receiving coil obtains.
Specifically, the quantity of magnetic screen patch and the coefficient of coup and cost of size and transmitting coil and receiving coil
With corresponding relationship, can be obtained by emulating this corresponding relationship the more balanced quantity of cost and the coefficient of coup and
Size, so as to save the cost.
Certainly, in addition to the above method, can also be determined by other kinds of mode magnetic screen patch quantity with
And size, the embodiment of the present invention is it is not limited here.
Embodiment as one preferred, magnetic screen patch are nanocrystal diskette.
Specifically, nanocrystal has the characteristics that magnetism isolating effect is good and at low cost.
Certainly, other than nanocrystal diskette, magnetic screen patch can also be other types, and the embodiment of the present invention is herein not
It limits.
Certainly, muti-piece magnetic screen patch can respectively have different materials, or identical material, the present invention are implemented
Example is it is not limited here.
In addition, since ferrite or nanocrystal have gathering magnetic when perhaps nanocrystal soft magnetism pastes using ferrite
The effect of field, is equivalent to the magnetic field of surrounding being adsorbed onto itself, and the soft magnetism patch of ring-type arrangement can make magnetic field be brought to ring-type
Center is conducive to induction in receiving coil and generates bigger electric current, improve transmission to enhance the magnetic field strength of ring center
Efficiency, and it is constant at a distance from guaranteeing receiving end power and transmitting coil between receiving coil in the case where, can reduce
The electric current and size of transmitting coil, in the situation that the electric current and size and receiving end power for guaranteeing transmitting coil are constant
Under, charging distance can be improved.
Embodiment as one preferred, the shape of magnetic screen patch are fan annular.
Specifically, the magnetic screen patch of fan annular is corresponding with the distribution situation of magnetic field strength, i.e., further away from hub of a spool
Periphery, then magnetic field strength is weaker, the magnetic screen patch for fanning annular can be corresponding with the distributing line of magnetic field strength, fans the outermost of annular
Magnetic field strength where edge be it is almost equal, material can be saved in the case where reaching same Magnetic Shielding Effectiveness.
Certainly, other than fanning annular, magnetic screen patch can also be other shapes, and the embodiment of the present invention is it is not limited here.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.It should also be noted that, in this theory
In bright book, the terms "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that including
The process, method, article or equipment of a series of elements not only includes those elements, but also its including being not explicitly listed
His element, or further include for elements inherent to such a process, method, article, or device.What is do not limited more
In the case of, the element that is limited by sentence "including a ...", it is not excluded that include the process, method of the element, article or
There is also other identical elements in person's equipment.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (8)
1. a kind of magnetic shielding device characterized by comprising
The ring-type between the transmitting coil and receiving coil of wireless charger is coaxially disposed every magnetic device, for isolating out
State the magnetic field positioned at the receiving coil periphery of transmitting coil generation；
The fixation device being connect with the ring-type every magnetic device, for fixing the ring-type every magnetic device；
Wherein, the cyclic annular internal diameter every magnetic device is not less than the outer diameter of the receiving coil.
2. magnetic shielding device according to claim 1, which is characterized in that the ring-type includes arrangement annular in shape every magnetic device
Several pieces of magnetic screens patch.
3. magnetic shielding device according to claim 2, which is characterized in that the magnetic screen patch is ferroxcube magnetic sheet.
4. magnetic shielding device according to claim 1, which is characterized in that the cyclic annular internal diameter every magnetic device is greater than described
The outer diameter preset value of receiving coil.
5. magnetic shielding device according to claim 4, which is characterized in that the preset value is the receiving coil outer diameter
10%.
6. magnetic shielding device according to claim 2, which is characterized in that the quantity and size of the magnetic screen patch pass through
In default cost, the coefficient of coup of the quantity and the size and the transmitting coil and the receiving coil is emulated
Between corresponding relationship obtain.
7. magnetic shielding device according to claim 1, which is characterized in that the magnetic screen patch is nanocrystal diskette.
8. magnetic shielding device according to any one of claims 1 to 7, which is characterized in that the shape of magnetic screen patch is
Fan annular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910636548.8A CN110233525A (en) | 2019-07-15 | 2019-07-15 | A kind of magnetic shielding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910636548.8A CN110233525A (en) | 2019-07-15 | 2019-07-15 | A kind of magnetic shielding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110233525A true CN110233525A (en) | 2019-09-13 |
Family
ID=67855499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910636548.8A Pending CN110233525A (en) | 2019-07-15 | 2019-07-15 | A kind of magnetic shielding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110233525A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207977786U (en) * | 2017-12-05 | 2018-10-16 | 宁波微鹅电子科技有限公司 | A kind of electromagnetic screen, wireless charging transmitting terminal, receiving terminal and system |
-
2019
- 2019-07-15 CN CN201910636548.8A patent/CN110233525A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207977786U (en) * | 2017-12-05 | 2018-10-16 | 宁波微鹅电子科技有限公司 | A kind of electromagnetic screen, wireless charging transmitting terminal, receiving terminal and system |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190913 |
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| RJ01 | Rejection of invention patent application after publication |