CN108521152A - A kind of magnetic coupling type wireless charging system - Google Patents
A kind of magnetic coupling type wireless charging system Download PDFInfo
- Publication number
- CN108521152A CN108521152A CN201810392905.6A CN201810392905A CN108521152A CN 108521152 A CN108521152 A CN 108521152A CN 201810392905 A CN201810392905 A CN 201810392905A CN 108521152 A CN108521152 A CN 108521152A
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- radio energy
- coil
- receiving coil
- magnetic permeability
- circuit
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- 238000010168 coupling process Methods 0.000 title claims abstract description 22
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 22
- 230000008878 coupling Effects 0.000 title claims abstract description 21
- 230000035699 permeability Effects 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 18
- 238000000034 method Methods 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 6
- 230000004907 flux Effects 0.000 description 6
- 239000011324 bead Substances 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 229910000859 α-Fe Inorganic materials 0.000 description 5
- 239000000243 solution Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 230000002528 anti-freeze Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- H02J7/025—
-
- 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
- H01F27/2823—Wires
-
- 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
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
Abstract
This application provides a kind of magnetic coupling type wireless charging systems, including：Radio energy emitter, the radio energy emitter include power circuit, oscillating circuit, driving circuit and transmitting coil；Radio energy reception device, the radio energy reception device include receiving coil, rectification circuit, regulator circuit, and the radio energy reception device intercouples with the radio energy emitter；Include high magnetic permeability device between the radio energy sending device and the radio energy reception device, the magnetic conductivity device includes the nonmetallic materials of high magnetic permeability.Therefore, magnetic coupling type wireless charging electric wire system provided by the embodiments of the present application can improve the magnetic conductivity between coil, to improve system efficiency of transmission.
Description
Technical field
This application involves field wireless charging fields, and more particularly, to a kind of magnetic coupling type wireless charging system.
Background technology
In high-power wireless electric energy transmission system such as electric vehicle radio energy transmission system, electric current can between dispatch coil
Up to hundreds of amperes, the magnetic flux for being up to hundreds thousand of Gausses is generated.Assuming that there are 0.1% leakage fields for main flux, leakage field is also up to hundreds of millis
Gauss, this flux value are also more several times greater than flux value as defined in international Non-ionizing radiation committee standard.
Magnetic coupling wireless charging technology is the mainstream technology of current wireless charging, reduces magnetic field exposure, is to improve magnetic coupling
Wireless charging efficiency most efficient method mostly uses the frame mode for adding antifreeze plate outside coil, reduces magnetic field in the prior art
Leakage, but the technology can only play certain leakage field barrier effect, can not effectively improve the effect of magnetic coupling wireless charging
Rate, therefore there is no the disadvantages for fundamentally solving magnetic coupling wireless charging technology for this method for reducing leakage magnetic field.
Therefore, there is an urgent need for a kind of magnetic coupling wireless charging system, wireless charging efficiency can be improved.
Invention content
The application provides a kind of magnetic coupling type wireless charging system, can improve wireless charging efficiency.
In a first aspect, a kind of magnetic coupling type wireless charging system is provided, including：Radio energy emitter, it is described wireless
Electric energy transmission device includes power circuit, oscillating circuit, driving circuit and transmitting coil；Radio energy reception device, the nothing
Line electric energy reception device includes receiving coil, rectification circuit, regulator circuit, the radio energy reception device and the radio
Energy emitter intercouples；It include high magnetic permeability between the radio energy sending device and the radio energy reception device
Device, the magnetic conductivity device include the nonmetallic materials of high magnetic permeability.
With reference to first aspect, it in the first possible realization method of first aspect, is wrapped in the high magnetic permeability device
The high-permeability material included can be one kind in following material：Solid-state, liquid, gaseous state have the non-metallic material of high magnetic permeability
Material.
With reference to first aspect and its above-mentioned realization method, described in second of possible realization method of first aspect
High magnetic permeability device and the electric energy transmitting coil and electric energy receiving coil coaxial placement, the high magnetic permeability device can be along described
The axial activity of transmitting coil and the receiving coil.
With reference to first aspect and its above-mentioned realization method, described in the third possible realization method of first aspect
Radio energy transmitting coil and radio energy receiving coil are cylindrical solenoid formula.
With reference to first aspect and its above-mentioned realization method, described in the 4th kind of possible realization method of first aspect
Radio energy transmitting coil and radio energy receiving coil are formed using close around mode coiling by litz wire.
Therefore, magnetic coupling type wireless charging electric wire system provided by the embodiments of the present application can improve the magnetic conductivity between coil,
To improve system efficiency of transmission, wireless charging efficiency is improved.
Description of the drawings
Fig. 1 is the schematic diagram of the magnetic coupling wireless charging system of the application one embodiment.
Specific implementation mode
Below in conjunction with attached drawing, the technical solution in the application is described.
Specific example label in Fig. 1 is as follows：In figure, 10-radio energy transmitting coils；20-have high magnetic permeability
Device；30-radio energy receiving coils.
Magnetic coupling type wireless charging system includes radio energy emitter and radio energy reception device.Radio energy is sent out
Injection device includes power circuit, oscillating circuit, driving circuit and transmitting coil 10；Radio energy reception device includes receiving coil
30, rectification circuit, regulator circuit.
As shown in Figure 1, the magnetic coupling type wireless charging system of the application, including：
Radio energy emitter, the radio energy emitter include power circuit, oscillating circuit, driving circuit and
Transmitting coil 10；
Radio energy reception device, the radio energy reception device include receiving coil 30, rectification circuit, voltage stabilizing electricity
Road, the radio energy reception device intercouple with the radio energy emitter；
Include high magnetic permeability device 20 between the radio energy sending device and the radio energy reception device, it is described
Magnetic conductivity device includes the nonmetallic materials of high magnetic permeability.
Specifically, radio energy transmitting coil 10 intercouples with radio energy receiving coil 30, radio energy emission lines
Circle 10 generates fixed frequency high-frequency resonant magnetic field, when resonant frequency and the radio energy transmitting coil of radio energy receiving coil 30
When the fixed frequency of 10 generations is identical, it is that load is charged that 30 end of radio energy receiving coil, which generates induced electromotive force,.
Optionally, as another embodiment of the application, the high magnetic permeability device and the electric energy transmitting coil and electric energy
Receiving coil coaxial placement, the high magnetic permeability device can be along the axial activities of the transmitting coil and the receiving coil.
Optionally, as the application one embodiment, the high-permeability material that the high magnetic permeability device includes can be with
For one kind in following material：Solid-state, liquid, gaseous state have the nonmetallic materials of high magnetic permeability.
Optionally, as the application one embodiment, the radio energy transmitting coil and radio energy receiving coil are equal
For cylindrical solenoid formula.
Optionally, as the application one embodiment, the radio energy transmitting coil and radio energy receiving coil are equal
It is formed around mode coiling using close by litz wire.
Since air core coil is larger by surrounding environment influence, vortex and magnetic hystersis loss are larger, so in order to effectively improve line
Enclose across magnetic flux to improve the size of the coefficient of coup, a ferrite bead 20 is placed in radio energy emission lines by this example
Between circle 10 and radio energy receiving coil 30, the magnet ring 20 can circle along the shaft to activity, reduce system leakage field, effectively improve magnetic
Flux density, to achieve the purpose that raising system efficiency of transmission and increase system transmission range.
When radio energy transmitting coil and radio energy receiving coil are coaxial spiral coil, resonance manifold type wireless charging
Electrical distance and the relationship of mutual inductance are：
(1) in formula, μ0For the magnetic conductivity in air；N1、N2For the number of turns of radio energy transmitting and receiving coil；r1、r2For
Radio energy emits and the radius of receiving coil；D distances between radio energy transmitting coil and radio energy receiving coil.
If magnet ring is on radio energy transmitting coil and radio energy receiving coil intermediate symmetrical position, for structure,
The identical transmitting coil N=N of parameter1=N2, r=r1=r2；μrFor the relative permeability for having added after movable magnet ring.
It can be seen that after having added ferrite bead between radio energy transmitting coil and radio energy receiving coil, consider
To μr＞ ＞ μ0, when mono- timings of distance D, can make the mutual inductance M' between radio energy transmitting coil and radio energy receiving coil
It greatly enhances.
The coefficient of coup between radio energy transmitting circuit and radio energy receiving circuit is represented by with k：
System power efficiency of transmission η is represented by the function expression containing independent variable coefficient of coup quality factor q
(4) in formula, Q1、Q2Respectively radio energy launching circuit and radio energy receive the loaded quality factor in circuit,
In,
By formula (4) it is found that transimission power increases with the increase of the coefficient of coup.Radio energy transmitting coil and radio
After having added ferrite bead between energy receiving coil, the magnetic conductivity between coil improves, and the coefficient of coup between coil increases, and reaches
The purpose of raising system efficiency of transmission.
Therefore, magnetic coupling type wireless charging electric wire system provided by the embodiments of the present application can improve the magnetic conductivity between coil,
To improve system efficiency of transmission.
In order to better illustrate the embodiment of the present application, now it is illustrated below by preferred embodiment, preferred embodiment one：
Independently build a set of magnet coupled resonant type wireless electric energy transmission test system, including radio energy emitter and nothing
Line electric energy reception device.Radio energy emitter includes power circuit, oscillating circuit, driving circuit and transmitting coil；Wirelessly
Electric energy reception device includes receiving coil, rectification circuit, regulator circuit.In the experimental system, radio energy transmitting and reception coupling
Zygonema circle by diameter 1mm litz wire it is close enclosed around 5, inductance value is about 17uH, and the working frequency of system is 100kHz.
Keep distance D=10cm, input dc power U between radio energy transmitting coil and radio energy receiving coil1=15V
When, receiving terminal exports DC current I2=0.5A loads RLWhen=20 Ω:When transmission medium is air, system efficiency of transmission is about
It is 40.35%；After having added ferrite bead between radio energy transmitting coil and radio energy receiving coil, system transmission effect
Rate is about 50.30%, and system efficiency of transmission about improves 9.95%.
Preferred embodiment two：It is same set of experimental system with preferred embodiment one.
Input dc power U1When=15V, receiving terminal exports DC current I2=0.5A loads RLWhen=20 Ω, control experiment
The efficiency of transmission of system about η=40% remains unchanged：When transmission medium is air, radio energy transmitting coil and radio energy
Distance is about 10cm between receiving coil；Ferrite bead is added between radio energy transmitting coil and radio energy receiving coil
Afterwards, distance is about 12cm between radio energy transmitting coil and radio energy receiving coil, and system transmission range about increases 2cm.
Those of ordinary skill in the art may realize that lists described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is implemented in hardware or software, depends on the specific application and design constraint of technical solution.Professional technician
Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed
The scope of the present invention.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, it can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of division of logic function, formula that in actual implementation, there may be another division manner, such as multiple units or component
It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be the indirect coupling by some interfaces, device or unit
It closes or communicates to connect, can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, you can be located at a place, or may be distributed over multiple
In network element.Some or all of unit therein can be selected according to the actual needs to realize the mesh of this embodiment scheme
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also
It is that each unit physically exists alone, it can also be during two or more units be integrated in one unit.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer read/write memory medium.Based on this understanding, technical scheme of the present invention is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be expressed in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be
People's computer, server or the second equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.
And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic disc or CD.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. a kind of magnetic coupling type wireless charging system, which is characterized in that including：
Radio energy emitter, the radio energy emitter include power circuit, oscillating circuit, driving circuit and transmitting
Coil；
Radio energy reception device, the radio energy reception device include receiving coil, rectification circuit, regulator circuit, described
Radio energy reception device intercouples with the radio energy emitter；
Include high magnetic permeability device, the magnetic conductivity between the radio energy sending device and the radio energy reception device
Device includes the nonmetallic materials of high magnetic permeability.
2. system according to claim 1, which is characterized in that the high-permeability material that the high magnetic permeability device includes
It can be one kind in following material：Solid-state, liquid, gaseous state have the nonmetallic materials of high magnetic permeability.
3. system according to claim 1 or 2, which is characterized in that the high magnetic permeability device and the electric energy emission lines
Circle and electric energy receiving coil coaxial placement, the high magnetic permeability device can be along the axial direction of the transmitting coil and the receiving coil
Activity.
4. system according to any one of claim 1 to 3, which is characterized in that the radio energy transmitting coil and nothing
Line electric energy receiving coil is cylindrical solenoid formula.
5. system according to any one of claim 1 to 4, which is characterized in that the radio energy transmitting coil and nothing
Line electric energy receiving coil is formed using close around mode coiling by litz wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810392905.6A CN108521152A (en) | 2018-04-27 | 2018-04-27 | A kind of magnetic coupling type wireless charging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810392905.6A CN108521152A (en) | 2018-04-27 | 2018-04-27 | A kind of magnetic coupling type wireless charging system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108521152A true CN108521152A (en) | 2018-09-11 |
Family
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| CN201810392905.6A Pending CN108521152A (en) | 2018-04-27 | 2018-04-27 | A kind of magnetic coupling type wireless charging system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109067004A (en) * | 2018-09-14 | 2018-12-21 | 重庆大学 | A kind of magnetic coupling radio energy-transmitting method and device based on magnetic fluid |
| CN109215995A (en) * | 2018-09-17 | 2019-01-15 | 邢益涛 | magnetic coupling transmission system |
| CN109701157A (en) * | 2017-12-29 | 2019-05-03 | 深圳硅基仿生科技有限公司 | Radio-frequency signal detection device and retina stimulator with detection coil |
| CN110098662A (en) * | 2019-01-27 | 2019-08-06 | 深圳市启天太一科技有限公司 | Magnetic coupling coefficient enhances system |
| CN111478138A (en) * | 2020-05-13 | 2020-07-31 | 李峥炜 | Anti-abrasion data line |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202602382U (en) * | 2012-05-03 | 2012-12-12 | 苏州强芯电子有限公司 | Wireless electric energy transmitting system |
| CN106451822A (en) * | 2016-12-13 | 2017-02-22 | 北京理工大学 | Wireless energy transmission intelligent charging device |
-
2018
- 2018-04-27 CN CN201810392905.6A patent/CN108521152A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202602382U (en) * | 2012-05-03 | 2012-12-12 | 苏州强芯电子有限公司 | Wireless electric energy transmitting system |
| CN106451822A (en) * | 2016-12-13 | 2017-02-22 | 北京理工大学 | Wireless energy transmission intelligent charging device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109701157A (en) * | 2017-12-29 | 2019-05-03 | 深圳硅基仿生科技有限公司 | Radio-frequency signal detection device and retina stimulator with detection coil |
| CN109067004A (en) * | 2018-09-14 | 2018-12-21 | 重庆大学 | A kind of magnetic coupling radio energy-transmitting method and device based on magnetic fluid |
| CN109067004B (en) * | 2018-09-14 | 2022-03-11 | 重庆大学 | Magnetic coupling wireless energy transfer method and device based on magnetic fluid |
| CN109215995A (en) * | 2018-09-17 | 2019-01-15 | 邢益涛 | magnetic coupling transmission system |
| CN110098662A (en) * | 2019-01-27 | 2019-08-06 | 深圳市启天太一科技有限公司 | Magnetic coupling coefficient enhances system |
| CN111478138A (en) * | 2020-05-13 | 2020-07-31 | 李峥炜 | Anti-abrasion data line |
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Application publication date: 20180911 |