CN109412278A - Adaptive magnetic resonance wireless charging device and method - Google Patents
Adaptive magnetic resonance wireless charging device and method Download PDFInfo
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- CN109412278A CN109412278A CN201810934041.6A CN201810934041A CN109412278A CN 109412278 A CN109412278 A CN 109412278A CN 201810934041 A CN201810934041 A CN 201810934041A CN 109412278 A CN109412278 A CN 109412278A
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Classifications
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- 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
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- 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
- H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
Abstract
Present disclose provides a kind of adaptive magnetic resonance wireless charging devices, it include: transmitting terminal and receiving end, wherein, transmitting terminal and receiving end include the identical transmitting end-coil of resonance frequency and receive end-coil, the transmitting terminal includes infrared sensor, for obtaining the space length of transmitting terminal and receiving end, wherein the coefficient of coup that the space length is used to adjust transmitting coil is in Coupling point always.By being blended using vector sensor technology and sensor technology, the spatial structure characteristic of intelligent decision receiving end and transmitting terminal, the constantly coefficient of coup of adjustment system, the efficiency of transmission of system and transimission power is allowed to remain optimal value, to reach, wireless charging operating distance is remote, the high feature of efficiency of transmission.
Description
Technical field
This disclosure relates to electronic technology field more particularly to a kind of adaptive magnetic resonance wireless charging device and method.
Background technique
As smart phone becomes increasingly popular, demand of all kinds of consumption electronic products to electricity is ubiquitous, how to get rid of tradition
The constraint of cable avoids the cumbersome of frequent charge, has become the new paragon for trying to please consumer.Wireless charging technology
(Wireless charging technology) be derived from wireless power transmission technology, from power divide can be divided into small-power without
Line charge electricity and high-power wireless charging two ways.It is divided from technology angle, mature technology path has at present: electromagnetism
Induction mode, radio wave mode, magnetic resonance mode, electric field induction mode.Wireless charging realizations all at present have transmitting
It is formed with two parts are received.The wireless charging mode of mainstream and corresponding standard include: wireless charging alliance (Wireless at present
Power Consortium) release QI standard-electromagnetic induction method；A4WP(Alliance for Wireless Power)
International wireless charging industry alliance (AirFuel Alliance) one after merging with PMA (Power Matters Alliance)
Magnetic resonance mode；Radio wave charging modes and field coupling formula wireless charging mode.Above-mentioned several technical implementation way are each
There are advantage and disadvantage, comprehensively considering the influence of charge power, charge efficiency, technical feasibility and cost to consumption electronic product,
The implementation method for needing a kind of novel magnetic induction wireless charging technology, while taking into account charge power and charge efficiency, energy
Enough solve the problems, such as in 50mm apart from interior wireless charging.
Summary of the invention
(1) technical problems to be solved
It is mentioned above at least partly to solve present disclose provides a kind of adaptive magnetic resonance wireless charging device and method
Out the technical issues of.
(2) technical solution
According to one aspect of the disclosure, provide a kind of adaptive magnetic resonance wireless charging device, comprising: transmitting terminal and
Receiving end, wherein transmitting terminal and receiving end include the identical transmitting end-coil of resonance frequency and receive end-coil, the transmitting terminal
Including infrared sensor, for obtaining the space length of transmitting terminal and receiving end, wherein the space length is for adjusting transmitting
The coefficient of coup of coil is in Coupling point always.
In some embodiments of the disclosure, transmitting terminal includes: transmitting terminal circuit board；Transmitting terminal magnetic screen piece, setting are being sent out
It penetrates above terminal circuit plate；At least one transmitting end-coil, is set to transmitting terminal magnetic screen on piece；And infrared sensor, one
End is correspondingly arranged at the center of each transmitting end-coil, and the other end is arranged on transmitting terminal circuit board.
In some embodiments of the disclosure, receiving end includes: receiving end magnetic screen piece, and；At least one receives end line
Circle is arranged in receiving end magnetic screen on piece.
In some embodiments of the disclosure, the coefficient of coup of transmitting coil is determined by two factors: no load resonance Q value and negative
Resonant Q value when load, wherein the space length that load resonant Q value surveys the transmitting terminal and receiving end that obtain according to infrared sensor is dynamic
State adjustment.
In some embodiments of the disclosure, load resonant Q value are as follows:
Q=V2/ (V1*L),
Wherein, V1 is the voltage value of input signal, and V2 is the voltage value by resonant capacitance after magnetic resonance generates, L
For the space length of transmitting terminal and receiving end.
In some embodiments of the disclosure, the no load resonance Q value of transmitting coil can determine according to the following formula:
Q=π/(- ln (Rate)),
Wherein Rate is rate of signal attenuation.
In some embodiments of the disclosure, the no load resonance Q value is determined by the diameter and the number of turns of coil.
A kind of adaptive magnetic resonance wireless charging method another aspect of the present disclosure provides, comprising:
S1: by the space length of infrared sensor acquisition transmitting terminal to receiving end, and line is determined according to the space length
The load resonant Q value of circle；
S2: it is that the load resonant Q value of coil and no load resonance Q value determine the coefficient of coup of coil according to determination, makes to receive and dispatch
The coefficient of coup of coil is in Coupling point always；
S3: transmitting coil transmits energy to receiving coil, and the receiving coil with identical resonance frequency receives electric power and will
It, which is converted to, to be the electric current of equipment charge.
In some embodiments of the disclosure, the step S2 includes the space length obtained by each infrared sensor
After negative justification carries resonant Q value, the coefficient of coup of coil is determined further according to no load resonance Q value, the coefficient of coup of dispatch coil is made to begin
It is in Coupling point eventually, the transmission power and resonance frequency of each coil are adjusted, so that transimission power and efficiency of transmission are optimal
Value.
In some embodiments of the disclosure, the step S3 includes being infused oscillating current using the charger of harmonic technology
Enter into the transmitting coil of high resonance the receiving coil to generate oscillating electromagnetic fields, with identical resonance frequency to receive from electromagnetic field
Electric power and be converted into can be equipment charge electric current.
(3) beneficial effect
It can be seen from the above technical proposal that the adaptive magnetic resonance wireless charging device of the disclosure and method at least have with
It is lower the utility model has the advantages that
By being blended using vector sensor technology and sensor technology, the space of intelligent decision receiving end and transmitting terminal is tied
Structure feature constantly adjusts the coefficient of coup of system, allows the efficiency of transmission of system and transimission power to remain optimal value, to reach
It is remote to wireless charging operating distance, the high feature of efficiency of transmission.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the adaptive magnetic resonance wireless charging device of the first embodiment of the present disclosure.
Fig. 2 is the schematic diagram of embodiment of the present disclosure transmitting coil signal decaying.
Fig. 3 is the schematic diagram that embodiment of the present disclosure transmitting coil determines Q value in load resonant.
Fig. 4 is the method flow diagram of the adaptive magnetic resonance wireless charging device of the embodiment of the present disclosure.
[embodiment of the present disclosure main element symbol description in attached drawing]
1, end-coil is received；2, receiving end magnetic screen piece；
3, emit end-coil；4, infrared sensor；
5, transmitting terminal circuit board；6, transmitting terminal magnetic screen piece.
Specific embodiment
QI rechargeable standard charging distance commercial at present require be dispatch coil centre distance no more than 8mm, in order to gram
Existing electromagnetic induction charged mode is taken, the shortcomings that operating distance is short, use space limitation, present disclose provides a kind of adaptive
Answer magnetic resonance wireless charging device and method, the distance of wireless charging can reach 50mm or so, combined charge power and
Charge efficiency.
For the purposes, technical schemes and advantages of the disclosure are more clearly understood, below in conjunction with specific embodiment, and reference
The disclosure is further described in attached drawing.
Disclosure some embodiments will be done referring to appended attached drawing in rear and more comprehensively describe to property, some of but not complete
The embodiment in portion will be shown.In fact, the various embodiments of the disclosure can be realized in many different forms, and should not be construed
To be limited to this several illustrated embodiment；Relatively, these embodiments are provided so that the disclosure meets applicable legal requirement.
The principle of existing magnetic resonance charging is thus to produce electricl energy the frequency tuning of two coils to resonance state simultaneously
Carry out wireless power transmission.Oscillating current is injected into high humorous by the principle based on electromagnetic coupling using the charger of harmonic technology
To generate oscillating electromagnetic fields in vibration coil.The second coil with identical resonance frequency receives electric power from electromagnetic field and is converted
For the electric current that can be equipment charge.
Existing magnetic resonance charging unit is when transmitting coil starts to transmit energy to reception circuit, according to resonance coupled systemes
Several variation, it may appear that three kinds of working conditions: undercoupling state, Critical Coupling point, overcoupling state.The difference of three kinds of states is led
The difference of charge power and charge efficiency is caused, and charging system itself is not aware that extraneous environment thus can not adjust automatically coupling
Collaboration number, so that the real large-scale application of magnetic resonance can not be made in consumption electronic product.The adaptive magnetic resonance device benefit of the disclosure
It is blended with vector sensor technology and sensor technology, the spatial structure characteristic of intelligent decision receiving end and transmitting terminal, is constantly adjusted
The coefficient of coup of whole system allows the efficiency of transmission of system and transimission power to remain optimal value.To reach wireless charging work
Remote, the high feature of efficiency of transmission with distance.
In first exemplary embodiment of the disclosure, a kind of adaptive magnetic resonance wireless charging device is provided.Fig. 1
For the structural schematic diagram of the adaptive magnetic resonance wireless charging device of the first embodiment of the present disclosure.As shown in Figure 1, the present embodiment is adaptive
Answering magnetic resonance wireless charging device includes transmitting terminal and receiving end, wherein transmitting terminal includes transmitting end-coil 3, infrared sensor
4, transmitting terminal circuit board 5 and transmitting terminal magnetic screen piece 6；Receiving end includes receiving end-coil 1 and receiving end magnetic screen piece 2.
Each component part of the adaptive magnetic resonance wireless charging device of the present embodiment is described in detail individually below.
Wherein, in receiving end, multiple receiving coils 1 are set on receiving end magnetic screen piece 2；In transmitting terminal, multiple transmittings
End-coil 3 is set on transmitting terminal magnetic screen piece 6, and there are an infrared sensor 4, infrared sensing in each 3 center of transmitting end-coil
Device carries out array scanning to external environment in the timestamp of 1ms by the way of timeslice poll, and multi-coil can organize networking
Network carries out real-time monitoring to three-D space structure.At transmitting 3 center of end-coil, the other end is set the setting of 4 one end of infrared sensor
It sets on the transmitting terminal circuit board 5 below transmitting terminal magnetic screen piece 6.In the present embodiment, the diameter of transmitting coil be 30mm~
40mm, it is 47uH that the number of turns of coil, which meets inductance value,；The diameter of receiving coil is 20mm, and the number of turns of coil meets inductance value and is
22uH。
The infrared sensor 4 of transmitting terminal form infrared array sensor measure it is extraneous detect be electrically charged apparatus casing
Space length, generally, be electrically charged the shell of equipment to the distance that its enclosure interior receives end-coil be a fixed value, thus
Transmitting end-coil can be obtained to the space length for receiving end-coil, thus transmitting terminal of the adaptive magnetic resonance device according to acquisition
The transmission power and resonance frequency of each transmitting coil are adjusted to the space length dynamic of receiving end.
Wherein, the principle of the transmission power and resonance frequency that dynamically adjust each coil is as follows:
The coefficient of coup of single coil is determined by two factors: resonant Q value when no load resonance Q value and load.
The no load resonance Q value of coil can determine that Rate is rate of signal attenuation according to Q=π/(- ln (Rate)).Fig. 2 institute
It is shown as the schematic diagram of transmitting coil signal decaying.
Fig. 3 show the schematic diagram that transmitting coil determines Q value in load resonant.The load resonant Q value of coil can root
Determine that in the adaptive magnetic resonance device of the present embodiment, no load resonance Q value is the diameter and the number of turns by coil according to resonant frequency point
Determining, and the space length dynamic that load resonant Q value needs to be surveyed according to infrared sensor adjusts.The load of final single coil
Resonant Q value is Q=V2/ (V1*L), wherein V1 is the voltage value of input signal, and V2 is to pass through resonance after magnetic resonance generates
The voltage value of capacitor (Resonance Capacitor).V1 can adjust duty ratio by MCU.L is that transmitting terminal arrives receiving end
Distance.
After carrying resonant Q value by the space length negative justification that each infrared sensor is surveyed, determined according to no load resonance Q value
The coefficient of coup of coil makes the coefficient of coup of dispatch coil be in Coupling point always, and the transmission power for adjusting each coil is harmonious
Vibration frequency, so that transimission power and efficiency of transmission are optimal value.
Certainly, above-mentioned hardware configuration should also include the functions moulds such as the power module (not shown) powered to infrared sensor
Block, these are those skilled in the art it should be understood that those skilled in the art in the art can also be according to function
Needs, add corresponding functional module, therefore not to repeat here.
So far, the adaptive magnetic resonance wireless charging device introduction of the first embodiment of the present disclosure finishes.
In second exemplary embodiment of the disclosure, a kind of adaptive magnetic resonance wireless charging method is provided.
Fig. 4 is the method flow diagram of the adaptive magnetic resonance wireless charging device of the embodiment of the present disclosure.As shown in figure 4, this reality
Applying the adaptive magnetic resonance wireless charging method of example includes:
Step S1, infrared sensor to coil to ... space length measure, and determine coil load resonant Q
Value；
Step S2 is that the load resonant Q value of coil and no load resonance Q value determine the coefficient of coup of coil according to determination, makes
The coefficient of coup of dispatch coil is in Coupling point always；
Step S3, transmitting coil start to transmit energy to receiving coil, have the receiving coil of identical resonance frequency from electricity
Magnetic field, which receives electric power and is converted into, to be the electric current of equipment charge.
Each step part of the adaptive magnetic resonance wireless charging device of the present embodiment is described in detail individually below.
Wherein, in step S1, infrared sensor 4 measures the space length for being electrically charged apparatus casing, to obtain transmitting
The space length to receiving end is held, thus in step s 2, adaptive magnetic resonance device is according to the space length dynamic of the measurement
The transmission power and resonance frequency for adjusting each coil, make the coefficient of coup of dispatch coil be in Coupling point always, reach transmission
The optimal value of power and efficiency of transmission.
The coefficient of coup of single coil is determined by two factors: resonant Q value when no load resonance Q value and load.
The no load resonance Q value of coil can determine that Rate is rate of signal attenuation according to Q=π/(- ln (Rate)).Coil
Load resonant Q value can be determined according to Q=V2/V1, i.e. resonant frequency point, wherein V1 is the voltage value of input signal, and V2 is magnetic
The voltage value by resonant capacitance after resonance generation.V1 can adjust duty ratio by MCU.
In the adaptive magnetic resonance wireless charging method of the present embodiment, no load resonance Q value is the diameter and the number of turns by coil
Determining, and the space length dynamic that load resonant Q value needs to be surveyed according to infrared sensor adjusts.The load of final single coil
Resonant Q value is Q=V2/ (V1*L), wherein L is space length of the transmitting terminal to receiving end.
After carrying resonant Q value by the space length negative justification that each infrared sensor is surveyed, determined according to no load resonance Q value
The coefficient of coup of coil makes the coefficient of coup of dispatch coil be in Coupling point always, and the transmission power for adjusting each coil is harmonious
Vibration frequency, so that transimission power and efficiency of transmission are optimal value.
In step S3, oscillating current is injected into the transmitting coil of high resonance, emission lines using the charger of harmonic technology
To generate oscillating electromagnetic fields in circle, the receiving coil with identical resonance frequency receives electric power from electromagnetic field and be converted into can
For the electric current of equipment charge.
Certainly, according to actual needs, the step of preparation method of disclosure display device also includes other, due to this public affairs
The innovation opened is unrelated, and details are not described herein again.
In order to achieve the purpose that brief description, any technical characteristic for making same application is described all in above-described embodiment 1
And in this, without repeating identical narration.
So far, the adaptive magnetic resonance wireless charging method introduction of the second embodiment of the present disclosure finishes.
So far, attached drawing is had been combined the embodiment of the present disclosure is described in detail.It should be noted that in attached drawing or saying
In bright book text, the implementation for not being painted or describing is form known to a person of ordinary skill in the art in technical field, and
It is not described in detail.In addition, the above-mentioned definition to each element and method be not limited in mentioning in embodiment it is various specific
Structure, shape or mode, those of ordinary skill in the art simply can be changed or be replaced to it.
It should also be noted that, the direction term mentioned in embodiment, for example, "upper", "lower", "front", "rear", " left side ",
" right side " etc. is only the direction with reference to attached drawing, not is used to limit the protection scope of the disclosure.Through attached drawing, identical element by
Same or similar appended drawing reference indicates.When may cause understanding of this disclosure and cause to obscure, conventional structure will be omitted
Or construction.
And the shape and size of each component do not reflect actual size and ratio in figure, and only illustrate the embodiment of the present disclosure
Content.In addition, in the claims, any reference symbol between parentheses should not be configured to the limit to claim
System.
It unless there are known entitled phase otherwise anticipates, the numerical parameter in this specification and appended claims is approximation, energy
Enough bases pass through the resulting required characteristic changing of content of this disclosure.Specifically, all be used in specification and claim
The middle content for indicating composition, the number of reaction condition etc., it is thus understood that repaired by the term of " about " in all situations
Decorations.Under normal circumstances, the meaning expressed refers to include by specific quantity ± 10% variation in some embodiments, some
± 5% variation in embodiment, ± 1% variation in some embodiments, in some embodiments ± 0.5% variation.
Furthermore word "comprising" does not exclude the presence of element or step not listed in the claims.It is located in front of the element
Word "a" or "an" does not exclude the presence of multiple such elements.
In addition, unless specifically described or the step of must sequentially occur, there is no restriction in the above institute for the sequence of above-mentioned steps
Column, and can change or rearrange according to required design.And above-described embodiment can be based on the considerations of design and reliability, that
This mix and match is used using or with other embodiments mix and match, i.e., the technical characteristic in different embodiments can be freely combined
Form more embodiments.
Those skilled in the art will understand that can be carried out adaptively to the module in the equipment in embodiment
Change and they are arranged in one or more devices different from this embodiment.It can be the module or list in embodiment
Member or component are combined into a module or unit or component, and furthermore they can be divided into multiple submodule or subelement or
Sub-component.Other than such feature and/or at least some of process or unit exclude each other, it can use any
Combination is to all features disclosed in this specification (including adjoint claim, abstract and attached drawing) and so disclosed
All process or units of what method or apparatus are combined.Unless expressly stated otherwise, this specification is (including adjoint power
Benefit require, abstract and attached drawing) disclosed in each feature can carry out generation with an alternative feature that provides the same, equivalent, or similar purpose
It replaces.Also, in the unit claims listing several devices, several in these devices can be by same hard
Part item embodies.
Similarly, it should be understood that in order to simplify the disclosure and help to understand one or more of each open aspect,
Above in the description of the exemplary embodiment of the disclosure, each feature of the disclosure is grouped together into single implementation sometimes
In example, figure or descriptions thereof.However, the disclosed method should not be interpreted as reflecting the following intention: i.e. required to protect
The disclosure of shield requires features more more than feature expressly recited in each claim.More precisely, as following
Claims reflect as, open aspect is all features less than single embodiment disclosed above.Therefore,
Thus the claims for following specific embodiment are expressly incorporated in the specific embodiment, wherein each claim itself
All as the separate embodiments of the disclosure.
Particular embodiments described above has carried out further in detail the purpose of the disclosure, technical scheme and beneficial effects
Describe in detail it is bright, it is all it should be understood that be not limited to the disclosure the foregoing is merely the specific embodiment of the disclosure
Within the spirit and principle of the disclosure, any modification, equivalent substitution, improvement and etc. done should be included in the guarantor of the disclosure
Within the scope of shield.
Claims (10)
1. a kind of adaptive magnetic resonance wireless charging device, comprising: transmitting terminal and receiving end, wherein transmitting terminal and receiving end are wrapped
It includes the identical transmitting end-coil of resonance frequency and receives end-coil, the transmitting terminal includes infrared sensor, for obtaining transmitting
The space length at end and receiving end,
Wherein, the coefficient of coup that the space length is used to adjust transmitting coil is in Coupling point always.
2. adaptive magnetic resonance wireless charging device according to claim 1, wherein transmitting terminal includes:
Transmitting terminal circuit board；
Transmitting terminal magnetic screen piece is arranged in transmitting terminal circuit board；
At least one transmitting end-coil, is set to transmitting terminal magnetic screen on piece；And
Infrared sensor, one end are correspondingly arranged at the center of each transmitting end-coil, and the other end is arranged in transmitting terminal circuit board
On.
3. adaptive magnetic resonance wireless charging device according to claim 2, wherein receiving end includes:
Receiving end magnetic screen piece, and；
At least one receives end-coil, is arranged in receiving end magnetic screen on piece.
4. adaptive magnetic resonance wireless charging device according to claim 1, the coefficient of coup of transmitting coil by two because
Element determines: resonant Q value when no load resonance Q value and load, wherein load resonant Q value surveys the transmitting obtained according to infrared sensor
The space length dynamic at end and receiving end adjusts.
5. adaptive magnetic resonance wireless charging device according to claim 4, load resonant Q value are as follows:
Q=V2/ (V1*L),
Wherein, V1 is the voltage value of input signal, and V2 is the voltage value by resonant capacitance after magnetic resonance generates, and L is hair
Penetrate the space length of end and receiving end.
6. the no load resonance Q value of adaptive magnetic resonance wireless charging device according to claim 4, transmitting coil can root
It is determined according to following formula:
Q=π/(- ln (Rate)),
Wherein Rate is rate of signal attenuation.
7. adaptive magnetic resonance wireless charging device according to claim 6, the no load resonance Q value by coil diameter
It is determined with the number of turns.
8. a kind of adaptive magnetic resonance wireless charging method, using the described in any item adaptive magnetic resonance of such as claim 1-7
Wireless charging device, comprising:
S1: by the space length of infrared sensor acquisition transmitting terminal to receiving end, and coil is determined according to the space length
Load resonant Q value；
S2: it is that the load resonant Q value of coil and no load resonance Q value determine the coefficient of coup of coil according to determination, makes dispatch coil
The coefficient of coup be in Coupling point always；
S3: transmitting coil transmits energy to receiving coil, and the receiving coil with identical resonance frequency receives electric power and by its turn
Be changed to be the electric current of equipment charge.
9. adaptive magnetic resonance wireless charging method according to claim 8, the step S2 includes, by each infrared
After the space length negative justification that sensor obtains carries resonant Q value, the coefficient of coup of coil is determined further according to no load resonance Q value, is made
The coefficient of coup of dispatch coil is in Coupling point always, adjusts the transmission power and resonance frequency of each coil, so that transmission function
Rate and efficiency of transmission are optimal value.
10. adaptive magnetic resonance wireless charging method according to claim 8, the step S3 includes using resonance skill
Oscillating current is injected into generate oscillating electromagnetic fields in the transmitting coil of high resonance by the charger of art, has identical resonance frequency
Receiving coil receive electric power from electromagnetic field and be converted into electric current to equipment charge.
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| WO2023020118A1 (en) * | 2021-08-16 | 2023-02-23 | Oppo广东移动通信有限公司 | Charging transmitter, charging receiving terminal, wireless charging system and methods |
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