CN106558924A - A kind of wireless charger and wireless charging control method - Google Patents
A kind of wireless charger and wireless charging control method Download PDFInfo
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- CN106558924A CN106558924A CN201610999088.1A CN201610999088A CN106558924A CN 106558924 A CN106558924 A CN 106558924A CN 201610999088 A CN201610999088 A CN 201610999088A CN 106558924 A CN106558924 A CN 106558924A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The present invention relates to wireless charging technical field, more particularly to a kind of wireless charger and wireless charging control method.Wherein, wireless charger includes receptor and emitter；Communication signal is modulated to power carrier by receptor, and when resonance is formed with emitter, emitter demodulates communication signal from the power carrier for carry load disturbance, and adjusts alternating magnetic field according to communication signal, so that receptor produces predeterminated voltage.Resonate when disturbance occurs in the load of receptor, the disturbance can be coupled on power carrier, emitter is by carrying out decoupling stripping by load disturbance amount, construct a kind of communication signal for having eliminated load disturbance factor, and this communication signal is demodulated, correct communication signal is finally restored, the anti-disturbance ability of wireless charger communication is effectively enhanced, is improve wireless charger reliability of operation and safety.
Description
Technical field
The present invention relates to wireless charging technical field, more particularly to a kind of wireless charger and wireless charging controlling party
Method.
Background technology
Magnetic resonance wireless charging technology has convenient, closed, noncontact, the energy transmission range outstanding advantages such as farther out, closely
Nian Lai, magnetic resonance wireless charging technology have been got more and more applications in terms of mobile phone charging.
Magnetic resonance wireless charger is made up of with receptor emitter, and emitter excites the magnetic field of alternation, receptor according to
The magnetic field induction goes out electromotive force and is load supplying.In the operation of magnetic resonance wireless charger, emitter needs to obtain and receives
The information state of device, so as to construct closed loop system, in order to the working condition of adjustment emitter in time so that receptor can be pacified
Entirely, correctly energy is provided for load.
In communication process between transmitter and receiver, when disturbance occurs in the load of receptor, the disturbance can be reflected
It is incident upon on power carrier, is easily caused the communication signal distortion of gained after demodulation, and then affects the operation of magnetic resonance wireless charger
Safety and stability.
The content of the invention
Embodiment of the present invention purpose aims to provide a kind of wireless charger and wireless charging control method, its existing skill of solution
When there is disturbance in the load of art receptor, the technical problem of wireless charger job insecurity.
To solve above-mentioned technical problem, the embodiment of the present invention provides technical scheme below：
In a first aspect, the embodiment of the present invention provides a kind of wireless charger, the wireless charger include receptor and
Emitter；Communication signal is modulated to power carrier by the receptor, and when resonance is formed with the emitter, described
Emitter demodulates communication signal from the power carrier for carrying load disturbance, and adjusts friendship according to the communication signal
Varying magnetic field, so that the receptor produces predeterminated voltage.Resonance
Alternatively, the emitter includes the first electric capacity, and the emitter is additionally operable to detect the power carrier loading
In the both end voltage of first electric capacity.
Alternatively, the emitter also includes communication demodulator circuit, demodulates for the both end voltage by first electric capacity
Go out the communication signal.
Alternatively, the communication demodulator circuit includes：
Difference channel, including differential input end and difference output end, the differential input end load on first electric capacity
Both end voltage, the difference channel is for being converted into first voltage by the both end voltage of first electric capacity；
Analog switching circuit, including analog input end, analog output and simulation control end, the analog input end and institute
Difference output end connection is stated, the simulation control end is used to receive gating signal, so that the first voltage is by the simulation
On-off circuit；
Filter circuit, including filter input and filtering output end, the filter input and the analog output connect
Connect, the filter circuit is used for the high-frequency signal for filtering the first voltage, and seeks out for indicating the first voltage
Meansigma methodss second voltage；
Ac amplifier circuit, including amplify input and amplify outfan, the filtering output end and the amplification are input into
End connection, the ac amplifier circuit is for zooming into tertiary voltage by the second voltage；
Shaping circuit, including shaping input and shaping outfan, the shaping input and the amplification outfan connect
Connect, the shaping circuit is believed for the square wave for the tertiary voltage is shaped to square-wave signal, and the communication signal
Number.
Alternatively, the emitter also includes：
Countdown circuit, for receiving the communication signal, and drives letter according to communication signal output first
Number and the second drive signal；
Boost chopper, for receiving DC voltage and first drive signal, and drives according to described first
Signal is by the dc voltage boost into the 4th voltage；
Inverter circuit, for receiving second drive signal, and according to second drive signal by the described 4th
Voltage is reverse into the 5th voltage of symmetrical square wave；
First resonance circuit, for receiving the 5th voltage, and the alternation magnetic according to the 5th voltage-regulation
.
Alternatively, pulse width modulating signal of the gating signal for positive half period, and in the 5th voltage
In positive half period, the countdown circuit persistently exports the gating signal.
Alternatively, the receptor includes：
Sample circuit, loads on the voltage signal of load for sampling；
Control circuit is received, itself and the sample circuit connect, for according to the voltage signal, output modulation drives letter
Number；
Communication modulation circuit, itself and the reception control circuit connection, for according to the modulated drive signal, will be described
Communication signal is modulated to power carrier.
Alternatively, the receptor also includes：
Second resonance circuit, for coupling first resonance circuit, induces the 6th voltage；
Current rectifying and wave filtering circuit, which connects with second resonance circuit, for the 6th voltage is carried out rectification and filter
Ripple process, provides power supply for load.
In second aspect, the embodiment of the present invention provides a kind of wireless charging control method, and methods described includes：With reception
When device forms resonance, the power carrier for carrying load disturbance is received, wherein, communication signal is modulated to the work(by the receptor
Rate carrier wave；The communication signal is demodulated from the power carrier, and alternating magnetic field is adjusted according to the communication signal, so that
The receptor produces predeterminated voltage.
Alternatively, it is described when resonance is formed with receptor, communication letter is demodulated from the power carrier for carrying load disturbance
Number, including：When resonance being formed with receptor, detect that the power carrier for carrying load disturbance loads on first electric capacity
Both end voltage；The both end voltage of first electric capacity is demodulated into the communication signal.
In each embodiment of the invention, communication signal is modulated to power carrier by receptor, and with emitter shape
When resonance, emitter demodulates communication signal from the power carrier for carry load disturbance, and is adjusted according to communication signal
Section alternating magnetic field, so that receptor produces predeterminated voltage resonance, therefore, when there is disturbance in the load of receptor, the disturbance meeting
It is coupled on power carrier, emitter constructs one kind and eliminated load by load disturbance amount is carried out decoupling stripping
The communication signal of disturbance factor, and this communication signal is demodulated, correct communication signal is finally restored, is effectively strengthened
The anti-disturbance ability of wireless charger communication, improves wireless charger reliability of operation and safety.
Description of the drawings
One or more embodiments are illustrative by the picture in corresponding accompanying drawing, these exemplary theorys
Bright not constitute the restriction to embodiment, in accompanying drawing, the element with same reference numbers label is expressed as similar element, removes
Non- to have especially statement, composition is not limited the figure in accompanying drawing.
Fig. 1 is that the embodiment of the present invention provides a kind of schematic block circuit diagram of wireless charger；
Fig. 2 is that the embodiment of the present invention provides a kind of electrical block diagram of wireless charger；
Fig. 3 is that the embodiment of the present invention provides a kind of schematic block circuit diagram of communication demodulator circuit；
Fig. 4 is that the embodiment of the present invention provides a kind of first resonance circuit lower based on resonance, the second resonance circuit, communication tune
The equivalent circuit diagram that circuit processed, current rectifying and wave filtering circuit are constituted；
Fig. 5 is the circuit phasor diagram of Fig. 4；
Fig. 6 is the sequential chart of Fig. 4；
Fig. 7 is that the embodiment of the present invention provides a kind of communication modulation-demodulation signal sequential chart；
Fig. 8 is that the embodiment of the present invention provides a kind of schematic flow sheet of wireless charging control method；
The schematic flow sheet of the step of Fig. 9 is Fig. 8 0102.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, it is below in conjunction with drawings and Examples, right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
Fig. 1 is that the embodiment of the present invention provides a kind of schematic block circuit diagram of wireless charger.As shown in figure 1, the wireless charging
Electrical equipment 10 includes receptor 101 and emitter 102.Communication signal is modulated to power carrier by receptor 101, and with transmitting
When device 102 forms resonance, emitter 102 demodulates communication signal from the power carrier for carry load disturbance, and according to
Communication signal adjusts alternating magnetic field, so that receptor 101 produces predeterminated voltage.Resonance
When receptor is charged normal for load, external interference factor interference load is charged normal, and interference shows
As the charging current that can show as making load produces fluctuation, cause the communication signal distortion after emitter demodulation, so as to affect
The safety and stability of wireless charger work.Load herein can be support wireless charging function electronic equipment, example
As mobile phone, computer, Intelligent worn device and etc..When external interference factor can be that mobile phone is in wireless charging, handss
The state of the background application burst operation of machine；When can be in wireless charging, incoming call be received, can be
In wireless charging when, converse, and etc..
In the present embodiment, when disturbance occurs in the load of receptor, the disturbance can be coupled on power carrier, emitter
By load disturbance amount is carried out decoupling stripping, a kind of communication signal for having eliminated load disturbance factor is constructed, and it is right
This communication signal is demodulated, and finally restores correct communication signal, effectively enhances the anti-negative of wireless charger communication
Disturbance ability is carried, wireless charger reliability of operation and safety is improve.
Fig. 2 is that the embodiment of the present invention provides a kind of electrical block diagram of wireless charger.As shown in Fig. 2 emitter
102 include the first electric capacity C101.In order to reduce from power carrier demodulating the difficulty of communication signal, in emitter 102 and reception
When device 101 forms resonance, emitter 102 goes out the both end voltage that power carrier loads on the first electric capacity C101 by direct detection
UC101, so as to subsequently from both end voltage U of the first electric capacity C101C101Demodulate communication signal.
Alternatively, as shown in Fig. 2 emitter 102 also includes communication demodulator circuit 020, demodulator circuit 020 is communicated by first
The both end voltage of electric capacity C101 demodulates communication signal, and emitter 102 adjusts alternating magnetic field according to the communication signal.
As shown in figure 3, in certain embodiments, communication demodulator circuit 020 includes difference channel 0201, analog switching circuit
0202nd, filter circuit 0203, ac amplifier circuit 0204 and shaping circuit 0205.Difference channel 0201 includes differential input end
051 and difference output end 052, the first electric capacity C101 both end voltages UC101Differential input end 051 is loaded onto, difference channel 0201 will
Both end voltage U of the first electric capacity C101C101It is converted into first voltage UC101_1.Analog switching circuit 0202 includes analog input end
053rd, analog output 054 and simulation control end 055, analog input end 053 and difference output end 052 connect.When simulation control
End 055 receives gating signal, and analog switching circuit 0202 is closed, first voltage UC101_1By analog switching circuit 0202.Filter
Wave circuit 0203 includes that filter input 056 and filtering output end 057, filter input 056 and analog output 054 connect,
Filter circuit 0203 filters first voltage UC101_1High-frequency signal, and seek out for indicating first voltage UC101_1It is average
Second voltage U of valueC101_2.Ac amplifier circuit 0204 includes amplifying input 058 and amplifies outfan 059, filtering output end
057 and amplify input 058 and connect, ac amplifier circuit 0204 is by second voltage UC101_2Zoom into tertiary voltage UC101_3.It is whole
Shape circuit 0205 includes that shaping input 060 and shaping outfan 061, shaping input 060 and amplification outfan 059 connect,
Shaping circuit 0205 is by tertiary voltage UC101_3Square-wave signal is shaped to, and communication signal is square-wave signal.
As shown in Fig. 2 in certain embodiments, difference channel 0201 include the first transport and placing device U101, first resistor R104,
Second resistance R105,3rd resistor R106 and the 4th resistance R107, difference channel 0201 coordinate bias voltage Vref, electric by first
Hold both end voltage U of C101C101Be converted to first voltage U matched with late-class circuitC101_1。
As shown in Fig. 2 filter circuit 0203 includes the 5th resistance R108 and the second electric capacity C107, filter circuit 0203 is filtered
First voltage UC101_1High-frequency signal, and seek out for indicating first voltage UC101_1Meansigma methodss second voltage
UC101_2。
As shown in Fig. 2 ac amplifier circuit 0204 includes the second transport and placing device U102, the 6th resistance R109, the 7th resistance
R110 and the 3rd electric capacity C108, by prime AC signal, i.e. second voltage UC101_2It is enlarged into tertiary voltage UC101_3。
As shown in Fig. 2 shaping circuit 0205 include the 3rd transport and placing device U103, the 8th resistance R111, the 9th resistance R112 and
4th electric capacity C109.Shaping circuit 0205 is by tertiary voltage UC101_3It is shaped to square-wave signal UC101_4, and communication signal is side
Ripple signal UC101_4。
As shown in Fig. 2 one end of first resistor R104 is connected with one end of the first electric capacity C101, first resistor R104 it is another
One end is connected with the positive input terminal of the first transport and placing device U101；One end of 3rd resistor R106 is connected with the other end of the first electric capacity C101
Connect, the other end of 3rd resistor R106 is connected with the negative input end of the first transport and placing device U101；One end of second resistance R105 with it is inclined
Put voltage Vref to be connected, the other end of second resistance R105 is connected with the positive input terminal of the first transport and placing device U101；4th resistance
One end of R107 is connected with the negative input end of the first transport and placing device U101, the other end of the 4th resistance R107 and the first transport and placing device U101
Outfan connection；The analog input end 053 of analog switching circuit 0202 is connected with the outfan of the first transport and placing device U101；5th
One end of resistance R108 is connected with the analog output 054 of analog switching circuit 0202, the other end of the 5th resistance R108 and
The positive input terminal connection of two transport and placing device U102；One end of second electric capacity C107 is connected with the positive input terminal of the second transport and placing device U102,
The other end of the second electric capacity C107 is connected with ground GND；One end of 6th resistance R109 and the negative input end of the second transport and placing device U102
Connection, the other end of the 6th resistance R109 are connected with one end of the 3rd electric capacity C108, the other end and the ground GND of the 3rd electric capacity C108
Connection；One end of 7th resistance R110 is connected with the negative input end of the second transport and placing device U102, the other end of the 7th resistance R110 with
The outfan connection of the second transport and placing device U102；One end of 8th resistance R111 is connected with the outfan of the second transport and placing device U102, the
The other end of eight resistance R111 is connected with the positive input terminal of the 3rd transport and placing device U103；One end of 9th resistance R112 and the second amplifier
The outfan connection of device U102, the other end of the 8th resistance R111 are connected with the negative input end of the 3rd transport and placing device U103；4th is electric
The one end for holding C109 is connected with the negative input end of the 3rd transport and placing device U103, and the other end of the 4th electric capacity C109 is connected with ground GND.
In certain embodiments, as shown in Fig. 2 emitter 102 also includes countdown circuit 021, boost chopper
022nd, inverter circuit 023 and the first resonance circuit 024.Countdown circuit 021 receives communication signal, and according to communication signal
Export the first drive signal and the second drive signal.Boost chopper 022 receives DC voltage and the first drive signal, and
According to the first drive signal by dc voltage boost into the 4th voltage.The second drive signal of reception of inverter circuit 023, and according to
4th voltage is reverse into second drive signal the 5th voltage U of symmetrical square waveAB.First resonance circuit 024 receives the 5th voltage
UAB, and according to the 5th voltage UABAdjust alternating magnetic field.
Refer again to Fig. 2.Countdown circuit 021 is processor, and the processor includes multiple signal input parts and signal
Outfan, wherein, shaping circuit 0205 is by communication signal UC101_4It is sent to processor.Processor also with analog switching circuit
0202 simulation control end 055 connects, and to analog switching circuit 0202 send the first pulse width modulating signal PWM1 with
The turn-on and turn-off of control analog switching circuit 0202.In certain embodiments, the first pulse width modulating signal PWM1 is being just
Half period is gating signal, and analog switching circuit 0202 receives the gating signal and turns on, and in the 5th voltage UABJust half
In cycle, countdown circuit 021 persistently exports gating signal so that UC101(θ) signal can only be in UAB(θ) positive half period passes through
Analog switching circuit 0202.Processor herein can be by general processor, digital signal processor (DSP), special integrated electricity
It is road (ASIC), field programmable gate array (FPGA) or other PLDs, discrete gate or transistor logic, discrete
Any combinations of nextport hardware component NextPort or these parts.Further, processor herein can be any conventional processors, controller,
Microcontroller or state machine.Processor can also be implemented as the combination of computing device, for example, the combination of DSP and microprocessor,
Multi-microprocessor, one or more microprocessors combine DSP core or any other this configuration.
As shown in Fig. 2 boost chopper 022 include direct voltage source Vin, the first inductance L103, the 5th electric capacity C110,
6th electric capacity C111, the first NMOS tube Q107, the first diode D105, the first drive module Dr107 are constituted.DC source Vin
In parallel with the 5th electric capacity C110, the first inductance L103, the first diode D105, the 6th electric capacity C111 are electric with the 5th after being sequentially connected in series
Hold C110 it is in parallel, one end of the first inductance L103 is connected with the positive pole of the 5th electric capacity C110, the other end of the first inductance L103 and
The positive pole connection of the first diode D105, the negative pole of the first diode D105 are connected with the positive pole of the 6th electric capacity C111, and the 6th is electric
Hold the minus earth GND of C111.The drain electrode of the first NMOS tube Q107 is connected between the first inductance L103 and the first diode D105,
The outfan of the source ground GND of the first NMOS tube Q107, the grid of the first NMOS tube Q107 and the first drive module Dr107 connects
Connect.Ground GND is connected with the negative pole of DC source Vin.Countdown circuit 021 sends pulse width to the first drive module Dr107
Degree modulated signal PWM7, drives the first drive module Dr107, makes boost chopper 022 that dc voltage boost is electric into the 4th
Pressure, pulse width modulating signal PWM7 herein are the first drive signal that countdown circuit 021 sends.
As shown in Fig. 2 inverter circuit 023 is full bridge inverter, wherein, inverter circuit 023 includes the second NMOS tube
Q101, the 3rd NMOS tube Q102, the 4th NMOS tube Q103, the 5th NMOS tube Q104, the second drive module Dr101, the 3rd drive
Module Dr102, the 4th drive module Dr103 and the 5th drive module Dr104；The drain electrode of the second NMOS tube Q101 and the 5th NMOS
It is connected with the positive pole of the 6th electric capacity C111 after the drain electrode connection of pipe Q104；The source electrode and the 4th NMOS tube of the 3rd NMOS tube Q102
It is connected with the negative pole of the 6th electric capacity C111 after the source electrode connection of Q103；The source electrode of the second NMOS tube Q101 and the 3rd NMOS tube Q102
Drain electrode connection, wherein, the junction point is nominally A points；The drain electrode of the source electrode and the 4th NMOS tube Q103 of the 5th NMOS tube Q104
Connection, the junction point are nominally B points；The grid of the second NMOS tube Q101, the grid of the 3rd NMOS tube Q102, the 4th NMOS tube
The grid of Q103, order drives mould with the outfan of the second drive module Dr101, the 3rd to the grid of the 5th NMOS tube Q104 successively
The outfan of block Dr102, the outfan of the 4th drive module Dr103, the outfan connection of the 5th drive module Dr104, also,
The input successively to the second drive module Dr101 of countdown circuit 021, the input of the 3rd drive module Dr102, the 4th
The input of drive module Dr103, the 5th drive module Dr104 input send the first pulse width modulating signal PWM1,
Second pulse width modulating signal PWM2, the 4th pulse width modulating signal PWM4 and the 3rd pulse width modulating signal PWM3.
As shown in Fig. 2 the first resonance circuit 024 includes launching end-coil L101, one end of the first electric capacity C101 and inversion
The A points connection of circuit 023, the other end of the first electric capacity C101 are connected with one end of transmitting end-coil L101, launch end-coil
The other end of L101 is connected with the B points of inverter circuit 023.
As shown in Fig. 2 in certain embodiments, receptor 101 includes sample circuit 030, receives control circuit 031, leads to
News modulation circuit 032, the second resonance circuit 033 and current rectifying and wave filtering circuit 034.The sampling of sample circuit 030 loads on the electricity of load
Pressure signal.Control circuit 031 and sample circuit connection are received, for according to voltage signal, exporting modulated drive signal.Communication is adjusted
Circuit processed 032 and reception control circuit 031 connect, for according to modulated drive signal, communication signal being modulated to power carrier.
Second resonance circuit 033 is used to couple the first resonance circuit, induces the 6th voltage.Current rectifying and wave filtering circuit 034 and the second resonance
Circuit 033 connects, and for the 6th voltage is carried out rectification and Filtering Processing, provides power supply for load.
As shown in Fig. 2 sample circuit 030 includes the tenth resistance R102, the 11st resistance R103 and the 7th electric capacity C106.The
One end of ten resistance R102 is connected with the positive pole of the 8th electric capacity C105 of current rectifying and wave filtering circuit 034, and the tenth resistance R102's is another
End is connected with one end of the 11st resistance R103, and the other end of the 11st R103 is connected with ground GND, the 7th electric capacity C106 and the tenth
One resistance R103 is in parallel.
As shown in Fig. 2 it is processor to receive control circuit 031.Communication modulation circuit 032 include the 5th NMOS tube Q105,
6th NMOS tube Q106, the 9th electric capacity C103, the tenth electric capacity C104.Current rectifying and wave filtering circuit 034 include the second diode D101,
Three diode D102, the 4th diode D103, the 5th diode D104, the 8th electric capacity C105 and load resistance R101.Second is humorous
The circuit 033 that shakes includes the 9th electric capacity C102 and receives end-coil L102.One end of 9th electric capacity C102 and the second diode D101
Positive pole connection, receive end-coil L102 one end be connected with the positive pole of the 5th diode D104, the 9th electric capacity C102's is another
Hold and be connected with the other end for receiving end-coil L102；One end of 9th electric capacity C103 is connected with the positive pole of the second diode D101,
The other end of the 9th electric capacity C103 is connected with the drain electrode of the 5th NMOS tube Q105, and source electrode and the ground GNDB of the 5th NMOS tube Q105 connect
Connect；One end of tenth electric capacity C104 is connected with the positive pole of the 5th diode D104, the other end and the 6th of the tenth electric capacity C104
The drain electrode connection of NMOS tube Q106, the source electrode of the 6th NMOS tube Q106 are connected with ground GND；The grid of the 5th NMOS tube Q105 and
The grid connection of six NMOS tubes Q106；The negative pole and the 8th electric capacity of the negative pole and the 5th diode D104 of the second diode D101
The positive pole of C105 is connected, the negative pole of the positive pole and the 8th electric capacity C105 of the positive pole and the 3rd diode D103 of the 3rd diode D102
It is connected；The positive pole of the second diode D101 is connected with the negative pole of the 3rd diode D102, the positive pole of the 5th diode D104 and
The negative pole of four diode D103 is connected；Load resistance R101 is in parallel with the 8th electric capacity C105, negative pole and the ground of the 8th electric capacity C105
GND connects.Junction point between tenth resistance R102 and the 11st resistance R103 is connected with the AD mouths for receiving control circuit 031
Connect, the I/O port for receiving control circuit 031 is connected with the grid of the grid and the 6th NMOS tube Q106 of the 5th NMOS tube Q105.
The operation principle of wireless charger is as follows：
The boost in voltage of direct voltage source Vin is U by boost chopper 022DC, inverter circuit 023 is by UDCInversion angulation
Frequency be ω, the symmetrical voltage square wave that dutycycle is 50%, i.e. the 5th voltage UAB, drive the first resonance circuit 024 to excite alternation
Magnetic field, second resonance circuit 033 of receptor 101 induces corresponding voltage, rectified filter circuit after coupling this magnetic field
034 rectifying and wave-filtering is DC voltage and is load supplying.Power is transmitted to the second resonance circuit 033 from the first resonance circuit 024,
Here, the alternating voltage in this transmission path, alternating current, alternating magnetic field are referred to as power carrier, power carrier not only may be used
With through-put power, it is also used as serving as the carrier of transmission communication information.The collection current rectifying and wave filtering circuit 034 of sample circuit 030
Sample information is converted into angular frequency for ω by output voltageMCommunication modulated drive signal (angular frequencyMFar below power carrier
Frequencies omega), for driving the break-make of the 5th NMOS Q105, the 6th NMOS Q106 in communication modulation circuit 032, electricity is unloaded by throwing
Hold C103 (i.e. the 9th electric capacity), electric capacity C104 (the tenth electric capacity) to carry out amplitude to the power carrier on the second resonance circuit 033
Modulation, power carrier carry communication information and are transferred to the first resonance circuit 024, Jing communication demodulator circuit 020 detections and modulation
Afterwards, communication information is reduced to, communication information is admitted to countdown circuit 021, and countdown circuit 021 is according to communication information pair
Boost chopper 022 is controlled, and then by adjusting voltage UDCOutput voltage to cause current rectifying and wave filtering circuit 034 meets
Expected value, so as to realize wireless charging closed loop control of resonating.
Further, set the first electric capacity C101 with transmitting end-coil L101 leakage inductance component series resonance angular frequency as
ω, the series resonance angular frequency for setting the 9th electric capacity C102 with the leakage inductance component for receiving end-coil L102 are similarly ω.Inversion electricity
Road 023 is by UDCAngular frequency is reverse into for ω, the symmetrical voltage square wave that dutycycle is 50%, the first resonance circuit 024 and the is ordered about
There is resonance in two resonance circuit 033, now the first electric capacity C101 with the series impedance of the leakage inductance component of transmitting end-coil L101 is
Zero, accordingly, the 9th electric capacity C102 is zero with the series impedance of the leakage inductance component for receiving end-coil L102.Omit power carrier
Harmonic, only considers fundamental wave, can be by the first resonance circuit 024, the second resonance circuit 033, communication modulation circuit 032, rectification
The equivalent circuit diagram that filter circuit 034 is constituted, as shown in Figure 4.
As shown in figure 4, L104 is the coupling inductance component for launching end-coil L101, C113 is receiving terminal modulating capacitor
The equivalent capacity of transmitting terminal is refracted to after C103, electric capacity C104 series connection, R114 refracts to transmitting terminal for receiving terminal load resistance
Equivalent resistance, SW102 are equivalent communication modulation switch.If UAB(θ) be the first resonance circuit 024 input square wave, IC(θ) it is
The electric current of electric capacity C113, I are flowed through when SW102 is closedR(θ) it is the electric current that flows through resistance R114, IM(θ) to flow through inductance L104
Electric current, IAB(θ) be the first resonance circuit 024 input current.
If UAB(θ) it is：
To UAB(θ) Fourier decomposition is carried out, can try to achieve its fundamental wave is：
UAD1(θ) it is sinusoidal quantity, then Fig. 4 can be analyzed with phasor approach.Fig. 5 is phasor diagram corresponding with Fig. 4；
Fig. 6 is sequential chart corresponding with Fig. 4.
IfRespectively UAB1(θ), IAB (θ), IR (θ), Im (θ), the corresponding phases of IC (θ)
Amount, has under stable state：
From above formula, under SW102 disconnections with closure state,There is difference in magnitude, it means that communication signal is adjusted
MakeOn.When disturbance occurs in load, that is, during the generation saltus step of resistance R114 resistances,Amplitude correspondingly can occur
Change.
IfIt is delayedPhase angle beIfComponent in the imaginary axis isIfVirtual value be respectively IAB_rms、IAB_N_rms.Then have
IAB_N_rms=IAB_rms·|sinα|
It can be seen that,Communication information can either be reflected, but it is unrelated with resistance R114, i.e., do not affected by load disturbance.Virtual value IAB_N_rmsThe reactive power of wireless charger is actually reflected, I is usedAB_N_rmsAs demodulated signal
Load disturbance factor can be rejected by source.
I is illustrated belowAB_N_rmsThe extracting method of signal：
Electric capacity C101 both end voltage phasors are：
Due to:
Then have：
In UAB(θ) positive half period, UC101(θ) meansigma methodss UAB_AVG_PFor：
Therefore, UAB_AVG_PWith IAB_N_rmsIt is corresponding, due to UAB_AVG_PMeasurement is easier to, therefore can be gathered in UAB(θ) just
Meansigma methodss U of electric capacity C101 both end voltages during half cycleAB_AVG_PAs demodulated signal source.
Fig. 7 is that the embodiment of the present invention provides a kind of communication modulation-demodulation signal sequential chart；Please also refer to Fig. 2, Fig. 3 and Tu
7.Difference channel 0201 is by both end voltage U of the first electric capacity C101C101It is converted into first voltage UC101_1.The positive half cycle of PWM1 with
UAB(θ) positive half period is corresponding, using PWM1 as analog switching circuit 0202 gating signal so that UC101(θ) signal is in UAB
(θ) positive half period passes through analog switching circuit 0202.Filter circuit 0203 is used for filtering in the conducting rank of analog switching circuit 0202
Section electricity UC101_1On radio-frequency component, and play a part of to average and signal keeps, for seeking out reflection UAB_AVG_PSignal
UC101_2.Ac amplifier circuit 0204 is by prime AC signal UC101_2It is enlarged into signal UC101_3；Shaping circuit 0205 will exchange letter
Number be converted to the communication square wave of the reading of countdown circuit 021.So far, communicate demodulator circuit 020 to solve load disturbance amount
Coupling is peeled off, and constructs a kind of communication signal source for having eliminated load disturbance factor, and communication signal source is amplified with
Shaping, restores the communication information.
In sum, the power carrier of wireless charger is processed using communication demodulator circuit, by load disturbance amount
Decoupling stripping is carried out, so as to construct a kind of communication signal source for having eliminated load disturbance factor, and to this communication signal
Source is demodulated, and finally restores communication signal, effectively enhances the anti-disturbance ability of resonance wireless charger communication,
Improve resonance wireless charger reliability of operation and safety.
Used as the another aspect of the embodiment of the present invention, the embodiment of the present invention also provides a kind of wireless charging control method.Such as
Shown in Fig. 8, the wireless charging control method includes：
Step 0100, with receptor formed resonate when, from carry load disturbance power carrier demodulate communication signal,
Wherein, communication signal is modulated to power carrier by receptor；
Step 0102, according to communication signal adjust alternating magnetic field so that receptor produce predeterminated voltage.
Embodiment of the method is the same design based on product embodiments, under conditions of content does not conflict mutually, method reality
Applying example can be with the explanation of reference product embodiment.
When disturbance occurs in the load of receptor, the disturbance can be coupled on power carrier, and emitter is by load is disturbed
Momentum carries out decoupling stripping, constructs a kind of communication signal for having eliminated load disturbance factor, and this communication signal is entered
Row demodulation, finally restores correct communication signal, effectively enhances the anti-disturbance ability of wireless charger communication, carries
High wireless charger reliability of operation and safety.
In certain embodiments, as shown in figure 9, step 0102 includes：
Step 01021, with receptor formed resonate when, detect power carrier load on the first electric capacity two ends electricity
Pressure；
Step 01022, the both end voltage of the first electric capacity is demodulated into communication signal.
Embodiment of the method is the same design based on product embodiments, under conditions of content does not conflict mutually, method reality
Applying example can be with the explanation of reference product embodiment.
Finally it should be noted that：Above example only to illustrate technical scheme, rather than a limitation；At this
Under the thinking of invention, can also be combined between the technical characteristic in above example or different embodiment, step can be with
Realized with random order, and there are many other changes of the different aspect of the present invention as above, in order to simple and clear, they do not have
Have and provide in details；Although being described in detail to the present invention with reference to the foregoing embodiments, the ordinary skill people of this area
Member should be understood：Which still can be modified to the technical scheme described in foregoing embodiments, or to which part skill
Art feature carries out equivalent；And these modifications or replacement, do not make the essence of appropriate technical solution depart from each reality of the application
Apply the scope of a technical scheme.
Claims (10)
1. a kind of wireless charger, it is characterised in that including receptor and emitter；
Communication signal is modulated to power carrier by the receptor, and when resonance is formed with the emitter, the transmitting
Device demodulates communication signal from the power carrier for carrying load disturbance, and adjusts alternation according to the communication signal
Magnetic field, so that the receptor produces predeterminated voltage.
2. wireless charger according to claim 1, it is characterised in that the emitter includes the first electric capacity, described
Emitter is additionally operable to detect the both end voltage that the power carrier loads on first electric capacity.
3. wireless charger according to claim 2, it is characterised in that the emitter also includes communication demodulator circuit,
For the both end voltage of first electric capacity is demodulated the communication signal.
4. wireless charger according to claim 3, it is characterised in that the communication demodulator circuit includes：
Difference channel, including differential input end and difference output end, the differential input end load on the two of first electric capacity
Terminal voltage, the difference channel is for being converted into first voltage by the both end voltage of first electric capacity；
Analog switching circuit, including analog input end, analog output and simulation control end, the analog input end and the difference
Divide outfan connection, the simulation control end is used to receive gating signal, so that the first voltage passes through the analog switch
Circuit；
Filter circuit, including filter input and filtering output end, the filter input and analog output connection, institute
Filter circuit is stated for filtering the high-frequency signal of the first voltage, and is sought out for indicating the average of the first voltage
The second voltage of value；
Ac amplifier circuit, including amplify input and amplify outfan, the filtering output end and the amplification input connect
Connect, the ac amplifier circuit is for zooming into tertiary voltage by the second voltage；
Shaping circuit, including shaping input and shaping outfan, the shaping input and amplification outfan connection, institute
Shaping circuit is stated for the tertiary voltage is shaped to square-wave signal, and the communication signal is the square-wave signal.
5. wireless charger according to claim 4, it is characterised in that the emitter also includes：
Countdown circuit, for receiving the communication signal, and according to the communication signal export the first drive signal and
Second drive signal；
Boost chopper, for receiving DC voltage and first drive signal, and according to first drive signal
By the dc voltage boost into the 4th voltage；
Inverter circuit, for receiving second drive signal, and according to second drive signal by the 4th voltage
It is reverse into the 5th voltage of symmetrical square wave；
First resonance circuit, for receiving the 5th voltage, and produces the alternating magnetic field according to the 5th voltage.
6. wireless charger according to claim 5, it is characterised in that pulse width of the gating signal for positive half period
Degree modulated signal, and in the positive half period of the 5th voltage, the countdown circuit persistently exports the gating letter
Number.
7. wireless charger according to claim 5, it is characterised in that the receptor includes：
Sample circuit, loads on the voltage signal of load for sampling；
Control circuit is received, itself and the sample circuit connect, for according to the voltage signal, exporting modulated drive signal；
Communication modulation circuit, which connects with the reception control circuit, for according to the modulated drive signal, by the communication
Signal modulation is in power carrier.
8. wireless charger according to claim 7, it is characterised in that the receptor also includes：
Second resonance circuit, for coupling the alternating magnetic field excited by first resonance circuit, induces the 6th voltage；
Current rectifying and wave filtering circuit, which connects with second resonance circuit, for the 6th voltage is carried out at rectification and filtering
Reason, provides power supply for load.
9. a kind of wireless charging control method, it is characterised in that include：
When resonance being formed with receptor, demodulate communication signal from the power carrier for carrying load disturbance, wherein, the reception
The communication signal is modulated to the power carrier by device；
Alternating magnetic field is adjusted according to the communication signal, so that the receptor produces predeterminated voltage.
10. method according to claim 9, it is characterised in that it is described formed with receptor resonate when, from carrying load
The power carrier of disturbance demodulates communication signal, including：
When resonance being formed with receptor, detect that the power carrier for carrying load disturbance loads on the two ends of first electric capacity
Voltage；
The both end voltage of first electric capacity is demodulated into the communication signal.
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| CN108258818A (en) * | 2018-02-01 | 2018-07-06 | 维沃移动通信有限公司 | A kind of wireless charging control method and mobile terminal |
| CN110212651A (en) * | 2019-05-21 | 2019-09-06 | 深圳市优笔触控科技有限公司 | Twin coil antenna plate and its control circuit |
| CN110224466A (en) * | 2019-06-26 | 2019-09-10 | 广东技术师范大学 | A kind of smart phone wireless charger and its charging method |
| CN110401265A (en) * | 2018-04-24 | 2019-11-01 | 美芯晟科技（北京）有限公司 | Power emitting device, wireless charging system and its demodulation method |
| WO2020062923A1 (en) * | 2018-09-30 | 2020-04-02 | 华为技术有限公司 | Wireless charging receiving circuit, control method and terminal device |
| CN113036830A (en) * | 2019-12-25 | 2021-06-25 | 圣邦微电子（北京）股份有限公司 | Detection control circuit and control method based on wireless charging |
| CN113541329A (en) * | 2021-07-12 | 2021-10-22 | 清华大学深圳国际研究生院 | Wireless energy transmission system with global power control function |
| WO2021217981A1 (en) * | 2020-05-21 | 2021-11-04 | 青岛海尔智能技术研发有限公司 | Direct-current wireless power supply device, and control method and control apparatus therefor |
| CN113922518A (en) * | 2021-10-28 | 2022-01-11 | 成都斯普奥汀科技有限公司 | Magnetic resonance wireless charging system with switch power supply removed |
| CN114123537A (en) * | 2020-08-26 | 2022-03-01 | 华为技术有限公司 | Wireless charging transmitter, wireless charging receiver and wireless charging system |
| CN114204654A (en) * | 2022-01-12 | 2022-03-18 | 上海南芯半导体科技股份有限公司 | Voltage demodulation circuit for wireless charging system |
| CN115912582A (en) * | 2023-03-08 | 2023-04-04 | 紫光同芯微电子有限公司 | Wireless charger and control method thereof |
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| CN108258818B (en) * | 2018-02-01 | 2020-05-05 | 维沃移动通信有限公司 | Wireless charging control method and mobile terminal |
| CN108258818A (en) * | 2018-02-01 | 2018-07-06 | 维沃移动通信有限公司 | A kind of wireless charging control method and mobile terminal |
| CN110401265A (en) * | 2018-04-24 | 2019-11-01 | 美芯晟科技（北京）有限公司 | Power emitting device, wireless charging system and its demodulation method |
| WO2020062923A1 (en) * | 2018-09-30 | 2020-04-02 | 华为技术有限公司 | Wireless charging receiving circuit, control method and terminal device |
| US11870293B2 (en) | 2018-09-30 | 2024-01-09 | Huawei Technologies Co., Ltd. | Wireless charging receiver circuit, control method, and terminal device |
| CN110212651A (en) * | 2019-05-21 | 2019-09-06 | 深圳市优笔触控科技有限公司 | Twin coil antenna plate and its control circuit |
| CN110212651B (en) * | 2019-05-21 | 2024-04-05 | 深圳市优笔触控科技有限公司 | Dual-coil antenna board and control circuit thereof |
| CN110224466A (en) * | 2019-06-26 | 2019-09-10 | 广东技术师范大学 | A kind of smart phone wireless charger and its charging method |
| CN110224466B (en) * | 2019-06-26 | 2024-01-26 | 广东技术师范大学 | Wireless charger for smart phone and charging method thereof |
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| CN113036830A (en) * | 2019-12-25 | 2021-06-25 | 圣邦微电子（北京）股份有限公司 | Detection control circuit and control method based on wireless charging |
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| CN114123537A (en) * | 2020-08-26 | 2022-03-01 | 华为技术有限公司 | Wireless charging transmitter, wireless charging receiver and wireless charging system |
| CN114123537B (en) * | 2020-08-26 | 2024-05-17 | 华为技术有限公司 | Wireless charging transmitter, wireless charging receiver and wireless charging system |
| CN113541329B (en) * | 2021-07-12 | 2023-05-26 | 清华大学深圳国际研究生院 | Wireless energy transmission system with global power control function |
| CN113541329A (en) * | 2021-07-12 | 2021-10-22 | 清华大学深圳国际研究生院 | Wireless energy transmission system with global power control function |
| CN113922518A (en) * | 2021-10-28 | 2022-01-11 | 成都斯普奥汀科技有限公司 | Magnetic resonance wireless charging system with switch power supply removed |
| CN113922518B (en) * | 2021-10-28 | 2024-03-26 | 成都斯普奥汀科技有限公司 | Get rid of switching power supply's wireless charging system of magnetic resonance |
| CN114204654B (en) * | 2022-01-12 | 2023-11-21 | 上海南芯半导体科技股份有限公司 | Voltage demodulation circuit for wireless charging system |
| CN114204654A (en) * | 2022-01-12 | 2022-03-18 | 上海南芯半导体科技股份有限公司 | Voltage demodulation circuit for wireless charging system |
| CN115912582A (en) * | 2023-03-08 | 2023-04-04 | 紫光同芯微电子有限公司 | Wireless charger and control method thereof |
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