CN106300699A - Wireless charging receiver, wireless charging system and charge control method thereof - Google Patents
Wireless charging receiver, wireless charging system and charge control method thereof Download PDFInfo
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- CN106300699A CN106300699A CN201610829334.9A CN201610829334A CN106300699A CN 106300699 A CN106300699 A CN 106300699A CN 201610829334 A CN201610829334 A CN 201610829334A CN 106300699 A CN106300699 A CN 106300699A
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Classifications
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- H02J7/025—
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
Abstract
It relates to a kind of wireless charging receiver, wireless charging system and charge control method thereof.This wireless charging receiver includes: frequency modulation control module, reception resonant inducing module and reception control module, wherein, frequency modulation control module is for being polled multiple preset state, by the first outfan receiving resonant inducing module is carried out peakvalue's checking, by obtaining optimum state in the preset state of poll；Receiving resonant inducing module to be used for arranging the capacitance in LC resonance according to optimum state, to regulate the resonant frequency of LC resonance, control the second outfan output maximum charging current by regulation, LC resonance is formation in receiving resonant inducing module；Receive control module output extremely load to be charged after maximum charging current is carried out AC-DC conversion.Use the disclosure can make the resonant frequency resonant frequency close to transmitting terminal of receiving terminal, and then improve wireless charging efficiency.
Description
Technical field
It relates to wireless charging technical field, particularly relate to a kind of wireless charging receiver, wireless charging system
And charge control method.
Background technology
At present, wireless charging technology has been widely used in the charging process of terminal unit, such as, and WPC
(Wireless Power Consortium, wireless charging alliance) technical standard.
This WPC technical standard carries out magnetic induction by receiving terminal to electric current produced by transmitting terminal, controls wireless charging system
System output charging current is to load to be charged, and output is fed back to transmitting terminal by receiving terminal simultaneously, and then controls nothing by transmitting terminal
The end of line charging process.
Owing to manufacturing parameter and the parameter of materials of terminal unit exist error, during wireless charging, will result in and connect
Receiving end produces bigger error with the resonant frequency of the LC resonance of each self-forming of transmitting terminal, and causes the fall of wireless charging efficiency
Low.
Summary of the invention
Based on this, a purpose of the disclosure is to provide a kind of wireless charging receiver, is used for solving prior art
The middle problem causing wireless charging efficiency to reduce because the resonant frequency of receiving terminal is relatively big with the resonance frequency error of transmitting terminal.
Additionally, another object of the present disclosure is to provide a kind of wireless charging system and charge control method thereof, it is used for
Solve prior art causes wireless charging efficiency because the resonant frequency of receiving terminal and the resonance frequency error of transmitting terminal are relatively big
The problem reduced.
In order to solve above-mentioned technical problem, the technical scheme that the disclosure is used is:
A kind of wireless charging receiver, including: frequency modulation control module, reception resonant inducing module and reception control mould
Block, wherein, described frequency modulation control module is for being polled multiple preset state, by described reception resonant inducing module
The first outfan carry out peakvalue's checking, by the preset state of poll obtains optimum state；Described reception resonant inducing module
For arranging the capacitance in LC resonance according to described optimum state, to regulate the resonant frequency of described LC resonance, by described
Regulation controls the second outfan output maximum charging current, and described LC resonance is to be formed in described reception resonant inducing module
's；Described reception control module is output extremely load to be charged after described maximum charging current carries out AC-DC conversion.
A kind of wireless charging system, including wireless charging dispensing device and wireless charging receiver, wherein, described wireless
Charging receiver is above-mentioned wireless charging receiver.
A kind of charge control method of wireless charging system, described wireless charging system include wireless charging dispensing device and
Wireless charging receiver, described method includes: when wireless charging starts, and is polled multiple preset state；By right
The outfan receiving resonant inducing module in described wireless charging receiver carries out peakvalue's checking, by the preset state of poll
In obtain optimum state；Capacitance in LC resonance is set according to described optimum state, to regulate the resonance frequency of described LC resonance
Rate, controls described wireless charging receiver output maximum charging current by described regulation；Wherein, described LC resonance is in institute
State and receive formation in resonant inducing module.
Compared with prior art, the disclosure has the advantages that
By arranging frequency modulation control module in wireless charging receiver, with by frequency modulation control module at wireless charging
It is polled obtaining optimum state to multiple preset state during beginning so that wireless charging receiver is in wireless charging process
In, it is possible to according to optimum state, the resonant frequency of LC resonance is adjusted adaptively, and then makes wireless charging receive dress
The resonant frequency put is close to the resonant frequency of wireless charging dispensing device, thus is effectively improved the nothing of wireless charging system
Line charge efficiency.
It should be appreciated that it is only exemplary and explanatory, not that above general description and details hereinafter describe
The disclosure can be limited.
Accompanying drawing explanation
Accompanying drawing herein is merged in description and constitutes the part of this specification, it is shown that meet the enforcement of the disclosure
Example, and in description together for explaining the principle of the disclosure.
Fig. 1 is the block diagram according to a kind of wireless charging system involved by the disclosure；
Fig. 2 is the block diagram according to a kind of wireless charging receiver shown in an exemplary embodiment；
Fig. 3 is to receive the resonant inducing module block diagram an embodiment in Fig. 2 correspondence embodiment；
Fig. 4 be in Fig. 3 correspondence embodiment tunable capacitor unit at the circuit theory diagrams of an embodiment；
Fig. 5 be in Fig. 3 correspondence embodiment tunable capacitor unit at the circuit theory diagrams of another embodiment；
Fig. 6 is the flow chart of the charge control method according to a kind of wireless charging system shown in an exemplary embodiment.
By above-mentioned accompanying drawing, it has been shown that the embodiment that the disclosure is clear and definite, hereinafter will be described in more detail, these accompanying drawings
With word, the scope being not intended to be limited disclosure design by any mode is described, but by with reference to specific embodiment being
Those skilled in the art illustrate the concept of the disclosure.
Detailed description of the invention
Here in detail exemplary embodiment will be performed explanation, its example represents in the accompanying drawings.Explained below relates to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represents same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the disclosure.On the contrary, they are only with the most appended
The example of the apparatus and method that some aspects that described in detail in claims, the disclosure are consistent.
Fig. 1 is the block diagram according to a kind of wireless charging system involved by the disclosure, as it is shown in figure 1, this kind of wireless charging
System 10 includes wireless charging dispensing device 100 and wireless charging receiver 300.
Wherein, wireless charging dispensing device 100 includes but not limited to: sends control module 110 and sends resonant inducing mould
Block 130.
Wireless charging receiver 300 includes but not limited to: receives resonant inducing module 330 and receives control module 350.
During wireless charging, the electric current sending resonant inducing module 130 generation will produce a magnetic field, by this magnetic
Field makes to receive resonant inducing module 330 and induces electric current.
After the electric current induced carries out relevant treatment (such as, AC-DC conversion etc.), will be transmitted by receiving control module 350
To terminal unit 20, such as, terminal unit 20 can be smart mobile phone, panel computer, photographing unit, intelligent watch etc., and then
Realize the battery in terminal unit 20 is charged.
Additionally, receive control module 350 also will feed back the electric current of its output to transmission control module 110, with by sending
Control module 110 controls the end of wireless charging process, such as, when the electric current of feedback is gradually decrease to below predetermined threshold value, i.e.
Stop wireless charging process.
Should be appreciated that and send resonant inducing module 130 and receive resonant inducing module 330 by each self-forming LC resonance, if
The resonant frequency of the LC resonance of transmitting terminal keeps consistent with the resonant frequency of the LC resonance of receiving terminal, then receive resonant inducing module
330 electric currents induced are by maximum, and correspondingly, now wireless charging efficiency is the highest.
But, owing to manufacturing parameter and the parameter of materials of terminal unit 20 exist error, during wireless charging, will
The resonant frequency causing receiving terminal produces bigger error with the resonant frequency of transmitting terminal, and causes the fall of wireless charging efficiency
Low.
Therefore, in order to make the resonant frequency resonant frequency close to transmitting terminal of receiving terminal, to improve wireless charging efficiency,
A kind of wireless charging receiver of special proposition, this wireless charging receiver can apply to the wireless charging system shown in Fig. 1
10。
Referring to Fig. 2, in one exemplary embodiment, a kind of wireless charging receiver 300 includes but not limited to: frequency modulation
Control module 310, reception resonant inducing module 330 and reception control module 350.
Wherein, frequency modulation control module 310 is for being polled multiple preset state, by receiving resonant inducing module
First outfan of 330 carries out peakvalue's checking, by obtaining optimum state in the preset state of poll.
Preset state is to arrange the capacitance in LC resonance, and this LC resonance is to receive resonant inducing module 330
Middle formation.It is appreciated that when the capacitance set by preset state makes the resonant frequency of LC resonance closest to transmitting terminal
Resonant frequency, then the wireless charging efficiency of wireless charging system is up to the highest, and now, this preset state is i.e. considered optimal shape
State.
Specifically, when wireless charging starts, multiple preset state are i.e. taken turns by frequency modulation control module 310 automatically
Ask, and then by the preset state being polled to, the capacitance in LC resonance is configured.Wherein, frequency modulation control module 310 is led to
Crossing and be identified judging whether wireless charging starts to charging id signal, this charging id signal is sent dress by wireless charging
Put and generate and send.For example, if charging id signal is driven high, i.e. represent that wireless charging has started to, otherwise, if charging mark
Know signal and remain low level, then it represents that wireless charging not yet starts.Certainly, according to different application scenarios, charging mark
Signal can also be that low level represents that wireless charging has started to.
After capacitance in LC resonance is provided with, the resonant frequency of LC resonance is the most stable, now, receives humorous
The induction module 330 that shakes will induce electric current produced by wireless charging dispensing device according to this resonant frequency, and defeated via second
Go out end transmission to receiving control module 350.
Further, the electric current that it is also induced by reception resonant inducing module 330 is fed back to by the first outfan
Frequency modulation control module 310.This first outfan is then detected by frequency modulation control module 310 by peakvalue's checking, to detect
To the magnitude of voltage corresponding to the electric current induced or current value.Wherein, peakvalue's checking can be realized by peak-detector circuit,
It is well known to those skilled in the art, and does not repeats them here.
Based on this, the preset state being polled to will obtain a corresponding magnitude of voltage or current value, by by all pre-
If the magnitude of voltage that state is corresponding or current value compare, maximum voltage value or maximum current value, then this maximum will be drawn
Preset state corresponding to magnitude of voltage or maximum current value is optimum state.
Receive resonant inducing module 330 for arranging the capacitance in LC resonance according to optimum state, to regulate LC resonance
Resonant frequency, by regulation control second outfan output maximum charging current.
After obtaining optimum state, receive resonant inducing module 330 and i.e. complete the electricity in LC resonance according to optimum state
The setting of capacitance, i.e. during this wireless charging, receives institute after resonant inducing module 330 all will be arranged according to capacitance
The resonant frequency produced carrys out electric current produced by induction wireless charging dispensing device.
The electric current induced corresponding to receiving resonant inducing module 330 due to optimum state is maximum, therefore, most preferably
During state, the resonant frequency of receiving terminal is closest to the resonant frequency of transmitting terminal, receives resonant inducing module 330 and is exported
Charging current be also maximum, correspondingly, the wireless charging efficiency of wireless charging system is the highest.
Receive control module 350 output extremely load to be charged after maximum charging current is carried out AC-DC conversion.
Reception control module 350 is after receiving the maximum charging current receiving resonant inducing module 330 output, the most right
It carries out relevant treatment, such as, AC-DC conversion, and then transmission is to load to be charged, and i.e. terminal unit 20, realizes end with this
Battery in end equipment 20 is charged.
Being arranged by as above, when wireless charging starts each time, frequency modulation control module the most first carries out multiple pre-
If the poll of state, to realize arranging the capacitance in LC resonance according to optimum state adaptively so that the resonance of receiving terminal
Frequency, close to the resonant frequency of transmitting terminal, ensures during wireless charging each time with this, in receiving terminal and transmitting terminal
LC resonance reaches optimal resonant condition, so that wireless charging system reaches optimal charging effect, i.e. wireless charging effect
Rate is the highest.
Refer to Fig. 3, in one exemplary embodiment, receive resonant inducing module 330 and include receiving coil 331 and adjustable
Capacitor cell 333.
Wherein, tunable capacitor unit 333 is used for providing tunable capacitor and receiving coil 331 to produce LC resonance.
Should be appreciated that LC resonance is to produce in the circuit that inductance and electric capacity are parallel with one another.
In the present embodiment, receiving coil 331 is equivalent to inductance, and tunable capacitor unit 333 is then used for providing electric capacity, Jin Ertong
Cross inductance generation in parallel with electric capacity LC resonance.
Further, the electric capacity provided due to tunable capacitor unit 333 is tunable capacitor, and the capacitance of this tunable capacitor is
Adjustable, therefore, the resonant frequency of LC resonance by by being adjusted realizing regulation, thus favorably to the capacitance of tunable capacitor
In realizing being effectively improved of wireless charging efficiency subsequently through regulation LC resonant frequency.
Refer to Fig. 4, in one exemplary embodiment, tunable capacitor unit 333 include parallel connection multiple fixed capacities, with
And the multiple switching tubes connected respectively with multiple fixed capacities.
Wherein, the break-make of switching tube is controlled by fm control signal, and fm control signal is generated by preset state.
Table 1 preset state and the corresponding relation of tunable capacitor Cy
| Sequence number | A3 | A2 | A1 | A0 | Cy(μF) |
| 0 | 0 | 0 | 0 | 0 | 0 |
| 1 | 0 | 0 | 0 | 1 | 0.01 |
| 2 | 0 | 0 | 1 | 0 | 0.027 |
| 3 | 0 | 0 | 1 | 1 | 0.037 |
| 4 | 0 | 1 | 0 | 0 | 0.056 |
| 5 | 0 | 1 | 0 | 1 | 0.066 |
| 6 | 0 | 1 | 1 | 0 | 0.083 |
| 7 | 0 | 1 | 1 | 1 | 0.093 |
| 8 | 1 | 0 | 0 | 0 | 0.1 |
| 9 | 1 | 0 | 0 | 1 | 0.11 |
| 10 | 1 | 0 | 1 | 0 | 0.127 |
| 11 | 1 | 0 | 1 | 1 | 0.137 |
| 12 | 1 | 1 | 0 | 0 | 0.156 |
| 13 | 1 | 1 | 0 | 1 | 0.166 |
| 14 | 1 | 1 | 1 | 0 | 0.183 |
| 15 | 1 | 1 | 1 | 1 | 0.193 |
As shown in table 1, preset state is 16, is made up of four state parameters A0, A1, A2 and A3 respectively, correspondingly, adjusts
Frequently control signal is then generated by these 16 preset state.
When state parameter is 1, fm control signal will control switching tube conducting, and then make to connect with this switching tube
Fixed capacity produces LC resonance as a part of tunable capacitor Cy with receiving coil.Otherwise, when state parameter is 0, frequency modulation
Control signal will control switching tube and turn off, and then the fixed capacity connected with this switching tube then will not be humorous with receiving coil generation LC
Shake.
For example, when preset state A0A1A2A3 is 1001, its corresponding fm control signal generated will be controlled respectively
Switching tube Q1 processed conducting, switching tube Q2 conducting, switching tube Q3 turn off, switching tube Q4 conducting, and then make with switching tube Q1, Q2,
Q4 correspondence connect fixed capacity C30, C31, C33 all can be as parts of tunable capacitor Cy, i.e. the electricity of tunable capacitor Cy
Capacitance is 0.01 μ F+0.027 μ F+0.1 μ F=0.137 μ F.
Being arranged by as above, above-mentioned 16 preset state can be polled by frequency modulation control module so that can
The capacitance adjusting electric capacity Cy can be finely adjusted between 0 μ F～0.2 μ F, the resonant frequency reducing receiving terminal with this and transmitting terminal
Resonant frequency between produce bigger error, thus be conducive to improve wireless charging efficiency.
Certainly, in other embodiments, it is also possible to the number of preset state is adjusted, make this preset state by more
Individual state parameter forms, and then makes the capacitance of tunable capacitor Cy can obtain finely tuning more subtly, is conducive to all the more connecing
The resonant frequency of receiving end is substantially equal to the resonant frequency of transmitting terminal, thus improves wireless charging efficiency further.
Further, as shown in Figure 4, switching tube is p-type metal-oxide-semiconductor, and its drain electrode is connected with one end of fixed capacity, source electrode with
The second outfan receiving resonant inducing module 330 is connected, and grid is used for inputting fm control signal.
Certainly, in other embodiments, switching tube can also be had switch on and off by diode, audion, relay etc.
The components and parts of effect or circuit composition.
Further, tunable capacitor unit 333 also includes the multiple phase inverter U1 being connected respectively with multiple switching tubes, uses
In fm control signal is carried out Transistor-Transistor Logic level conversion.
Certainly, in other embodiments, phase inverter can also come by other level shifting circuits or electrical level transferring chip
Substitute, to realize the conversion of the Transistor-Transistor Logic level to fm control signal.
Should be appreciated that the fm control signal generated by preset state is digital signal, and switch tube carries out break-make control
System for analogue signal, changed by Transistor-Transistor Logic level, digital signal " 1 " will be made to be converted to the high voltage of analogue signal, and digital
Signal " 0 " is then converted to the low-voltage of analogue signal, thus is conducive to better controling over the break-make of switching tube.
Additionally, arranged by as above, also will realize modulus isolation, be effectively improved wireless charging system with this
Signal to noise ratio.
Seeing also Fig. 5, in one exemplary embodiment, tunable capacitor unit 333 also includes at least one basic electric capacity,
To produce LC resonance as a part for tunable capacitor and receiving coil 331.
Specifically, as it is shown in figure 5, tunable capacitor unit 333 also includes two basic electric capacity, respectively electric capacity C1 and electricity
Holding C2, the parallel value of the two is as a part of tunable capacitor Cx, and electric capacity Cy is then as another part of tunable capacitor Cx.
LC resonance is produced with receiving coil 331 by tunable capacitor Cx, and then by adjusting the capacitance of tunable capacitor Cx
Realize the regulation of the resonant frequency to LC resonance.Wherein, the relation between the resonant frequency of tunable capacitor Cx and LC resonance as with
Shown in lower formula:
Cx=[(fs×2π)2×L′S]-1,
Wherein, fsFor the resonant frequency of LC resonance, L 'S' there is inductance during mutual inductance relationships for receiving coil and transmitting coil
Value.This L 'SAt receiving coil, fixing can test by tester afterwards be obtained with the type of transmitting coil.
Arranged by as above, in wireless charging system, when the capacitance of electric capacity Cy is 0, can be by right
The setting of basic electric capacity, makes the resonant frequency of receiving terminal be essentially close to the resonant frequency of transmitting terminal.When basic electric capacity completes to set
After putting, then by the capacitance of electric capacity Cy being finely adjusted between 0 μ F～0.2 μ F, the resonant frequency of receiving terminal can be made
Further close to the resonant frequency of transmitting terminal, thus it is effectively improved the efficiency of wireless charging further.
Further, as it is shown in figure 5, receive the filter that resonant inducing module 330 also includes being connected with tunable capacitor unit 333
Ripple unit 335, for being filtered the electric current sensed, and is streamed to filtered electricity receive resonant inducing module
Second outfan of 330.
Filter unit 335 can be filter circuit, it is also possible to be wave filter, to believe the low-and high-frequency in the electric current sensed
Number filter, the noise introduced can also be filtered simultaneously, effectively further improve wireless charging in front stage circuits
The signal to noise ratio of system.
In the present embodiment, filter unit 335 is filter circuit, and this filter circuit includes the electric capacity C4 and electric capacity C5 of parallel connection,
As shown in Figure 5.Wherein, AC1 or AC2 all can be as the second outfan of reception resonant inducing module 330, in order to export charging
Electric current is to load to be charged.
It should be noted that the charging current that the reception resonant inducing module involved by the disclosure is exported remains exchange
Electricity form, before output to load to be charged, in addition it is also necessary to carrying out relevant treatment, such as, AC-DC conversion etc., it is ability
Known to field technique personnel, do not repeat them here.
Following for method of disclosure embodiment, go for the wireless charging system involved by the disclosure and wireless charging
Receive device.For the details not disclosed in method of disclosure embodiment, refer to the wireless charging involved by the disclosure and receive
Device embodiment.
Refer to Fig. 6, in one exemplary embodiment, the charge control method of a kind of wireless charging system, it is adaptable to Fig. 1
Shown wireless charging system 10.
As it is shown in figure 1, described wireless charging system 10 includes: wireless charging dispensing device 100 and wireless charging receive dress
Put 300.
Wherein, wireless charging dispensing device 100 includes but not limited to: sends control module 110 and sends resonant inducing mould
Block 130.Wireless charging receiver 300 includes but not limited to: receives resonant inducing module 330 and receives control module 350.
Correspondingly, described method can be performed by wireless charging receiver 300, may comprise steps of:
Multiple preset state, when wireless charging starts, are polled by step 610.
Preset state is to arrange the capacitance in LC resonance, and this LC resonance is to receive resonant inducing module 330
Middle formation.
Specifically, when wireless charging starts, multiple preset state are i.e. carried out by wireless charging receiver 300 automatically
Poll, and then by the preset state being polled to, the capacitance in LC resonance is configured.
Wherein, wireless charging receiver 300 is by being identified whether judging wireless charging to charging id signal
Starting, this charging id signal is generated and sent by wireless charging dispensing device.For example, if charging id signal is drawn
Height, i.e. represents that wireless charging has started to, otherwise, if charging id signal remains low level, then it represents that wireless charging is not yet
Start.Certainly, according to different application scenarios, charging id signal can also be that low level represents that wireless charging has started to.
Step 630, by carrying out peak value inspection to the outfan receiving resonant inducing module in wireless charging receiver
Survey, by the preset state of poll obtains optimum state.
Be appreciated that when the capacitance set by preset state make the resonant frequency of LC resonance closest to transmitting terminal humorous
Vibration frequency, then the wireless charging efficiency of wireless charging system is up to the highest, and now, this preset state is i.e. considered optimal shape
State.
After capacitance in LC resonance is provided with, the resonant frequency of LC resonance is the most stable, now, and wireless charging
The reception resonant inducing module 330 that electricity receives in device 300 will induce wireless charging dispensing device 100 according to this resonant frequency
Produced electric current, and export to terminal unit 20.
Further, the reception resonant inducing module 330 in wireless charging receiver 300 also will be by outfan to it
The electric current induced feeds back.This outfan is then detected by wireless charging receiver 300 by peakvalue's checking, with
Detection obtains the magnitude of voltage corresponding to electric current or the current value induced.Wherein, peakvalue's checking can be by peak detection electricity
Road realizes, and it is well known to those skilled in the art, and does not repeats them here.
Based on this, the preset state being polled to will obtain a corresponding magnitude of voltage or current value, by by all pre-
If the magnitude of voltage that state is corresponding or current value compare, maximum voltage value or maximum current value, then this maximum will be drawn
Preset state corresponding to magnitude of voltage or maximum current value is optimum state.
Step 650, arranges the capacitance in LC resonance according to optimum state, to regulate the resonant frequency of LC resonance, passes through
Regulation controls wireless charging receiver output maximum charging current.
After obtaining optimum state, receive resonant inducing module 330 and i.e. complete the electricity in LC resonance according to optimum state
The setting of capacitance, i.e. during this wireless charging, receives institute after resonant inducing module 330 all will be arranged according to capacitance
The resonant frequency produced carrys out electric current produced by induction wireless charging dispensing device 100.
The electric current induced corresponding to receiving resonant inducing module 330 due to optimum state is maximum, therefore, most preferably
During state, the resonant frequency of receiving terminal is closest to the resonant frequency of transmitting terminal, receives resonant inducing module 330 and is exported
Charging current be also maximum, correspondingly, the wireless charging efficiency of wireless charging system is the highest.
Further, receive control module 350 and receive the maximum charging current receiving resonant inducing module 330 output
Afterwards, i.e. it is carried out relevant treatment, such as, AC-DC conversion, and then transmission is to terminal unit 20, realizes setting terminal with this
Battery in standby 20 is charged.
In the disclosed embodiments, by being polled obtaining optimal shape to multiple preset state when wireless charging starts
State so that wireless charging receiver is during wireless charging, it is possible to carry out in LC resonance according to optimum state adaptively
The setting of capacitance, regulate the resonant frequency of LC resonance with this, and then the resonant frequency of wireless charging receiver connect
It is bordering on the resonant frequency of wireless charging dispensing device, thus is effectively improved the wireless charging efficiency of wireless charging system, make
Obtain wireless charging efficiency and can reach 80%.
The preferable examples embodiment of foregoing, the only disclosure, is not intended to limit the embodiment of the disclosure, this
Field those of ordinary skill, according to the central scope of the disclosure and spirit, can carry out corresponding flexible very easily or repair
Change, therefore the protection domain of the disclosure should be as the criterion with the protection domain required by claims.
Claims (10)
1. a wireless charging receiver, it is characterised in that including: frequency modulation control module, receive resonant inducing module and connecing
Receipts control module, wherein,
Described frequency modulation control module, for being polled multiple preset state, by described reception resonant inducing module
First outfan carries out peakvalue's checking, by obtaining optimum state in the preset state of poll；
Described reception resonant inducing module, for arranging the capacitance in LC resonance according to described optimum state, described with regulation
The resonant frequency of LC resonance, controls the second outfan output maximum charging current by described regulation, and described LC resonance is in institute
State and receive formation in resonant inducing module；
Described reception control module, after described maximum charging current carries out AC-DC conversion, output is to load to be charged.
2. device as claimed in claim 1, it is characterised in that described reception resonant inducing module includes receiving coil and adjustable
Capacitor cell, described tunable capacitor unit is used for providing tunable capacitor to produce described LC resonance with described receiving coil.
3. device as claimed in claim 2, it is characterised in that described tunable capacitor unit includes the multiple fixing electricity of parallel connection
The multiple switching tubes held and connect respectively with multiple described fixed capacities, the break-make of described switching tube is controlled by frequency modulation control
Signal, described fm control signal is generated by described preset state.
4. device as claimed in claim 3, it is characterised in that described switching tube is p-type metal-oxide-semiconductor, its drain electrode is fixing with described
One end of electric capacity is connected, and source electrode is connected with the second outfan of described reception resonant inducing module, and grid is used for inputting described tune
Frequently control signal.
5. device as claimed in claim 3, it is characterised in that described tunable capacitor unit also includes and multiple described switching tubes
The multiple phase inverters connected respectively, for carrying out Transistor-Transistor Logic level conversion to described fm control signal.
6. device as claimed in claim 3, it is characterised in that the adjustable extent of described tunable capacitor 0 μ F～0.2 μ F it
Between.
7. device as claimed in claim 2, it is characterised in that described tunable capacitor unit also includes at least one basic electric capacity,
Described LC resonance is produced with described receiving coil using the part as described tunable capacitor.
8. device as claimed in claim 2, it is characterised in that described reception resonant inducing module also includes and described adjustable electric
Hold the filter unit that unit is connected, for the electric current sensed is filtered, and connect described in filtered electricity is streamed to
Receive the second outfan of resonant inducing module.
9. a wireless charging system, including wireless charging dispensing device and wireless charging receiver, it is characterised in that described
Wireless charging receiver is the wireless charging receiver described in any one of claim 1-8.
10. a charge control method for wireless charging system, described wireless charging system include wireless charging dispensing device and
Wireless charging receiver, it is characterised in that described method includes:
When wireless charging starts, multiple preset state are polled；
By the outfan receiving resonant inducing module in described wireless charging receiver is carried out peakvalue's checking, by poll
Preset state in obtain optimum state；
Capacitance in LC resonance is set according to described optimum state, to regulate the resonant frequency of described LC resonance, by described
Regulation controls described wireless charging receiver output maximum charging current；
Wherein, described LC resonance is formed in described reception resonant inducing module.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107959357A (en) * | 2017-11-29 | 2018-04-24 | 歌尔科技有限公司 | A kind of wireless charging receiving circuit, frequency adjusting method and smart machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107959357A (en) * | 2017-11-29 | 2018-04-24 | 歌尔科技有限公司 | A kind of wireless charging receiving circuit, frequency adjusting method and smart machine |
| CN108400644A (en) * | 2018-03-09 | 2018-08-14 | 昆山国显光电有限公司 | A kind of electric energy reception device and flexible display screen |
| CN110350670A (en) * | 2019-05-29 | 2019-10-18 | 北京航空航天大学 | A kind of Universal wireless charging transmitting end device and control method |
| CN110350670B (en) * | 2019-05-29 | 2022-05-17 | 北京航空航天大学 | Universal wireless charging transmitting terminal device and control method |
| CN115986960A (en) * | 2023-02-15 | 2023-04-18 | 合肥有感科技有限责任公司 | Wireless charging system configuration method |
| CN115986960B (en) * | 2023-02-15 | 2023-11-10 | 合肥有感科技有限责任公司 | Wireless charging system configuration method |
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