CN109995121A - The multi-to-multi wireless charging device and control method of power optimized - Google Patents
The multi-to-multi wireless charging device and control method of power optimized Download PDFInfo
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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
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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
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
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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
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
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Abstract
The invention discloses a kind of multi-to-multi wireless charging devices of power optimized, comprising: power supply unit, controller, driving unit, output unit and multiple transmitting coils；Wherein, successively via controller and driving unit and output unit are electrically connected power supply unit, and output unit is electrically connected with multiple transmitting coils respectively；Output unit is equipped with detection signal output end, and the detection signal output end and controller are electrically connected；Controller can be according to the charging current of the detection signal output end feedback of output unit and the impedance state of transmitting coil, after the voltage signal and current signal that are converted to transmitting coil, according to the voltage and current of voltage signal and current signal dynamic regulation transmitting coil, optimize the output power of power supply unit.The charging equipment due to controller can charging current to whole transmitting coils and charging voltage carry out dynamic regulation, the optimization of charge power may be implemented.
Description
Technical field
The present invention relates to the multi-to-multi wireless charging devices and control of wireless charging field more particularly to a kind of power optimized
Method processed.
Background technique
Wireless charging technology (Wireless Charging Technology) originates from the second half in 19th century, at that time electric energy
Transmission there is a problem of very big, and since there are a certain distance with electricity consumption region in power station, and wired power transmission network is not taken
It builds up, the transmission problem of electric energy becomes the problem of studying for many experts and scholars.In the society of nowadays advanced IT application, move
Dynamic equipment is largely flooded with our life, and these equipment are almost dependent on electric energy, and charging becomes as an important problem,
This transfers to become the project for being worth further investigation.
Mainly pass through following several technologies: induction (Magnetic currently based on the wireless charging in magnetic field
Induction), magnetic field resonance type (Magnetic resonance).
Wherein, induction working method is similar to transformer, and working frequency is less than 200KHz, and advantage is transmission effect
Rate is high, but usually requires that transmitting/receiving coil distance is usually less than 8mm.It is big by Hong Kong city in terms of electromagnetic induction technology
Take the lead has set up WPC (Wireless Power Consortium), and is proposed first wireless charging in the end of the year in 2012
International standard Qi standard, Qi standard be based on magnetic induction principle transmit electric energy, the degree of coupling between efficiency of transmission and dispatch coil
And the quality factor of circuit has relationship, wherein the degree of coupling not only has with the distance between two coils and relative size
It closes, also the angle between the shape of coil, coil has no small contact.Qi standard has been updated to 1.2.3 version at present,
Transmission power is improved from original 5W to 7.5W, it might even be possible to realize quick charge to a certain extent.Qi standard at this stage
It is still limited to the power supply of small-power electronic product, and QI standard is just in one-to-one charging.
The characteristics of magnetic field resonance type is so that capacitor and inductance resonate on given Frequency point in circuit, and reduction energy damages
Consumption, to effectively increase transmission range.Its working frequency can be from several hundred KHz to tens MHz.Existing industrial protocol has
The Rezence standard that A4WP alliance proposes.A4WP is the abbreviation of Alliance for Wireless Power standard, is by beauty
The wireless charging alliance that Qualcomm, state, Samsung, South Korea and Powermat company create jointly.But due to A4WP alliance
Makeup time is later, actually rare using the product of the standard at present, and Rezence standard also only accounts for the charging more than single pair
Mode.
Nowadays, wireless charging device in the market nearly all uses magnetic induction or magnetic resonance technology, but this is not
Represent the technology full maturity.The wireless charging technology of major producer all there is a problem of one it is fatal: spatial degrees of freedom
It is low.For the wireless charging of mobile phone, it needs to be properly placed on charging panel, and requires minimum with the spacing of charging panel.
Only when the coil and charger built-in coil position face on mobile phone, wireless charging can be carried out.In other words, precision is wanted
High operating method is asked to limit the extensive use of this kind of technology.
Summary of the invention
Based on the problems of prior art, the object of the present invention is to provide a kind of multi-to-multi of power optimized is wireless
Charging equipment and control method, can solve existing wireless charging device can not achieve multi-to-multi charging, charge power is small and fills
The high problem of electrically operated precision prescribed.
The purpose of the present invention is what is be achieved through the following technical solutions:
Embodiment of the present invention provides a kind of power optimized multi-to-multi wireless charging device, comprising:
Power supply unit, controller, driving unit, output unit and multiple transmitting coils；Wherein,
The power supply unit is successively electrically connected through the controller and the driving unit and the output unit, described
Output unit is electrically connected with the multiple transmitting coil respectively；
The output unit is equipped with detection signal output end, and the detection signal output end and the controller are electrically connected；
The controller can be according to the charging current and transmitting coil of the detection signal output end feedback of the output unit
Impedance state, it is dynamic according to the voltage signal and current signal after the voltage signal and current signal that are converted to transmitting coil
State regulates and controls the voltage and current of the transmitting coil, optimizes the output power of the power supply unit.
Embodiment of the present invention also provides a kind of power optimized multi-to-multi wireless charging control method, is applied to the present invention
The power optimized multi-to-multi wireless charging device, comprising the following steps:
Step 1) obtains the impedance matrix Z of transmitting coil number m, electrical equipment receiving coil number n and transmitting terminalT；
Step 2) applies the voltage matrix V that order is m to each transmitting terminalT, measure different voltages vectorUnder current matrix
IT；
Step 3) acquires complex matrix B and S；
Step 4) portion Q realistic to complex matrix S asks it to correspond to the feature vector of maximum eigenvalue matrix Q
Step 5) basisReal number K and c are acquired, transmitting terminal adaptation electric current is then acquired
Step 6) basisAcquiring willIt is converted into transmitting coil adaptation voltage
Step 7) Xiang Suoshu transmitting coil applies the adaptation voltage vectorRealize the output work for making the power supply unit
Rate optimizes.
As seen from the above technical solution provided by the invention, power optimized multi-to-multi provided in an embodiment of the present invention
Wireless charging device and control method, it has the advantage that:
Pass through the power supply unit of setting, controller, driving unit, output unit and multiple transmitting coil organic linkings, shape
It can be carried out the multipair wireless charging device to charging with multiple transmitting coils at a kind of, since controller can be to whole emission lines
The charging current and charging voltage of circle carry out dynamic regulation, and the optimization of charge power may be implemented.The charging equipment can be short
Distance is interior to carry out wireless charging to more electrical equipments simultaneously, and can reach the multi-to-multi high efficiency of transmission of rechargeable electrical energy.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is that wireless charging device provided in an embodiment of the present invention is integrally formed schematic diagram；
Fig. 2 is the circuit theory schematic diagram of wireless charging device provided in an embodiment of the present invention；
Fig. 3 is that the integrated circuit of wireless charging device provided in an embodiment of the present invention constitutes schematic diagram；
Fig. 4 is that the driving unit of wireless charging device provided in an embodiment of the present invention uses the partial schematic diagram of circuit；
Fig. 5 be wireless charging device provided in an embodiment of the present invention controller using circuit at schematic diagram；
Fig. 6 is the output waveform diagram of the controller of wireless charging device provided in an embodiment of the present invention；
Fig. 7 is the phase difference and voltage relationship figure of wireless charging device provided in an embodiment of the present invention；
Fig. 8 is the Amplitude Ration and voltage relationship figure of wireless charging device provided in an embodiment of the present invention；
Fig. 9 is the circuit diagram of the vibrational control module of wireless charging device provided in an embodiment of the present invention；
Figure 10 is that the reception circuit of the corresponding electrical equipment of wireless charging device provided in an embodiment of the present invention constitutes signal
Figure；
Figure 11 is power optimized multi-to-multi wireless charging control method flow chart provided in an embodiment of the present invention；
Figure label are as follows: 1- power supply unit；11- rectification circuit；12- filter regulator circuit；2- controller；21- oscillation control
Molding block；22- optimization processing module；3- driving unit；4- output unit；41- detection module；42- inverter.
Specific embodiment
Below with reference to particular content of the invention, technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts,
Belong to protection scope of the present invention.The content being not described in detail in the embodiment of the present invention belongs to professional and technical personnel in the field
The well known prior art.
As shown in Figure 1, 2, the embodiment of the present invention provides a kind of multi-to-multi wireless charging device of power optimized, comprising:
Power supply unit, controller, driving unit, output unit and multiple transmitting coils；Wherein,
The power supply unit is successively electrically connected through the controller and the driving unit and the output unit, described
Output unit is electrically connected with the multiple transmitting coil respectively；
The output unit is equipped with detection signal output end, and the detection signal output end and the controller are electrically connected；
The controller can be according to the charging current and transmitting coil of the detection signal output end feedback of the output unit
Impedance state, it is dynamic according to the voltage signal and current signal after the voltage signal and current signal that are converted to transmitting coil
State regulates and controls the voltage and current of the transmitting coil, optimizes the output power of the power supply unit.
In above-mentioned wireless charging device, controller includes: sequentially connected vibrational control module and optimization processing module；
Wherein, the vibrational control module is electrically connected with the D.C. regulated power supply output end of the power supply unit, is equipped with
Electric output terminal is electrically connected with the driving unit, which is used to be converted into AC power source in DC power supply
When, frequency of oscillation is provided, DC power supply is made to be converted into the AC power source that can regulate and control；
The optimization processing module is electrically connected with the detection signal output end of the output unit, described for receiving
The charging current of the detection signal output end feedback of output unit and the impedance state of transmitting coil, are converted to the electricity of transmitting coil
After pressing signal and current signal, according to the voltage and electricity of transmitting coil described in the voltage signal and current signal dynamic regulation
Stream, optimizes the output power of the power supply unit.
In above-mentioned wireless charging device, the circuit board that the vibrational control module of controller uses for upper and lower two layers and increases
Diode circuit and buffering capacitor is added in ground plane in earthed circuit.Enable input control signal input terminal in height in this way
Under frequency state, influence of other signals to control signal is preferably shielded, output end is made to obtain more stable and reliable waveform.In electricity
Using the thick copper lines for being more than or equal to 2.5mm when line circuit is arranged, and increase ground wire in thick copper lines two sides, both shields in this way
The interference of other signals, which also can guarantee, can bear high current in circuit board.
Referring to Fig. 7, in above-mentioned wireless charging device, controller is according to the voltage signal and current signal dynamic regulation institute
The voltage and current for stating transmitting coil optimizes the output power of the power supply unit are as follows:
Step 1) obtains transmitting coil number m, the receiving coil number n of electrical equipment and the impedance matrix of transmitting coil
ZT；
Step 2) applies the voltage matrix V that order is m to whole transmitting coilsT, measure different voltages vectorUnder electric current
Matrix IT；
Step 3) acquires complex matrix B and S；
Step 4) portion Q realistic to complex matrix S asks it to correspond to the feature vector of maximum eigenvalue matrix Q
Step 5) basisReal number K and c are acquired, transmitting coil adaptation electric current is then acquired
Step 6) basisAcquiring willIt is converted into transmitting coil adaptation voltage
Step 7) Xiang Suoshu transmitting coil applies voltage vectorRealization keeps the output power of the power supply unit optimal
Change.
Preferably, d convertor circuit realization can be used in above-mentioned vibrational control module, and digital analog converter is also known as D/A conversion
Device, abbreviation DAC, the digital quantity of parallel binary can be converted to DC voltage or DC current by it.D/A converter substantially by
4 parts form, i.e. weighted resistance network, operational amplifier, reference power supply and analog switch.Above-mentioned regulation according to the present invention is calculated
The digital quantity that method obtains is combined with code by numerical digit and to be indicated, for there is weighted code, every code has certain position power.For
Digital quantity is converted into analog quantity, every 1 code is converted into corresponding analog quantity by size of its power, then will
These analog quantitys are added, and the total analog quantity directly proportional to digital quantity can be obtained, to realize digital-to-analog conversion.
In above-mentioned wireless charging device, power supply unit includes: sequentially connected rectification circuit and filter regulator circuit；
Wherein, the rectification circuit is equipped with AC power source incoming end；
The filter regulator circuit is equipped with D.C. regulated power supply output end, the D.C. regulated power supply output end and the control
Device electrical connection.
In above-mentioned wireless charging device, output unit includes: detection module and inverter；
Wherein, the detection module and the inverter are electrically connected, which is arranged the detection signal output
End；
The inverter is equipped with multiple output ends, and each output end is electrically connected a transmitting coil.
In above-mentioned wireless charging device, driving unit uses high-frequency triode driving circuit or metal-oxide-semiconductor driving circuit.
The embodiment of the present invention also provides a kind of power optimized multi-to-multi wireless charging control method, applied to above-mentioned function
Rate optimizes multi-to-multi wireless charging device, comprising the following steps:
Step 1) obtains the impedance matrix Z of transmitting coil number m, electrical equipment receiving coil number n and transmitting terminalT；
Step 2) applies the voltage matrix V that order is m to each transmitting terminalT, measure different voltages vectorUnder current matrix
IT；
Step 3) acquires complex matrix B and S；
Step 4) portion Q realistic to complex matrix S asks it to correspond to the feature vector of maximum eigenvalue matrix Q
Step 5) basisReal number K and c are acquired, transmitting terminal adaptation electric current is then acquired
Step 6) basisAcquiring willIt is converted into transmitting coil adaptation voltage
Step 7) Xiang Suoshu transmitting coil applies the adaptation voltage vectorRealize the output work for making the power supply unit
Rate optimizes.
The embodiment of the present invention is specifically described in further detail below.
The present invention provides a kind of multi-to-multi wireless charging device of power optimized, is a kind of nothing that MIMO technology is utilized
Line magnetic charging equipment, with the Multiple Input Multiple Output of the communications field, under the premise of transmitting coil reaches certain efficiency, for
Body small-power receiving device carries out the wireless charging prototype of multi-to-multi, realizes wireless charging to several electrical equipments in short distance
Electricity solves the problems, such as low to the spatial degrees of freedom in wireless charging technology.Also, it, can be to magnetic due to using regulation algorithm
The magnetic field that resonance generates carries out moulding, reaches the high efficiency of transmission of electric energy multi-to-multi.
Magnetic charging is using magnetic field transmission energy, and there is relatively good safety in magnetic field for electric field and electromagnetic wave
Property.It is a kind of non radiation field, and electric field and electromagnetic field are radiation field, and electric field and frequency electromagnetic waves suffer from human body larger
Injury, and current scientific experiment not yet proves adverse effect of the magnetic field to human body, so it just becomes wireless charging field
Main media.In MIMO magnetic charging system, there are three types of different types of mutual inductance, i.e., transmitting terminal and transmitting terminal, transmitting terminal with
Mutual inductance between receiving end, receiving end and receiving end, it is such as availableForm indicate.Due to complicated influence
The factor, the mutual inductance value between coil can not be by being directly calculated, so needing to obtain reality by the actual measurement of other data
Mutual inductance value in environment.By stringent Electromagnetic Field Analysis, mutual inductance Mxy=Myx, so the Impedance Moment of transmitting terminal Tx
Battle array ZTWith receiving-end impedance matrix ZRIt is all symmetrical matrix.Since receiving end Rx is usually mobile device, so Tx-Rx/Rx-Rx is mutual
Incude this to be estimated over time and periodically.Therefore, once MIMO magnetic channel condition changes, regulate and control in practice
Algorithm should be able to detect signal intensity, and thus re-start beam forming.
For the mode for determining dynamic regulation, following several unknown quantitys in multi-to-multi wireless charging system are needed:
(1) system frequency f；
(2) coil mutual inductance Mi；
(3) loop resistance R is receivedr；
(4) resistance value R is loaded；
(5) magnetic induction density B；
(6) magnetic flux S.
In MIMO wireless charging system, consider that three kinds of different types of mutual inductances can be derived according to Kirchhoff's theorem
Following formula out.
There is voltage equation to any transmitting coil x:
There are current equations to any receiving coil y:
If indicating that all coils, formula are as follows using matrix form:
As shown in Appendix B, subscript T indicates to operate the transposition of vector or matrix for vector sum matrix definition therein.
In the case where general power is certain, if general power is P, transmitting terminal power PT, receiving end power PR, then three meets
Following equation:
Wherein RTAnd RRThe respectively resistance of transmitting terminal and receiving end is diagonal real number matrix, and subscript * indicates conjugate transposition,
The specific definition of matrix is shown in that following formula can be obtained in Appendix B, applying equation 1.3:
So the problem becomes how supplying transmitting terminal electric current under the premise of being no more than general power PSo that receiving end
Power PRMaximize? it is had been proven that in existing document as drawn a conclusion: under the premise of being no more than general power P, being met most
Bigization receiving end power PR'sTake matrix H*RRC times of the feature vector of H maximum eigenvalue is evenIt is matrix H*RRH is maximum special
The corresponding feature vector of value indicative, then there is real numberC=P/K is enabled, then the optimal solution of compliance problem can
It indicates are as follows:
Show that the concrete mode of dynamic regulation is as follows according to above-mentioned analysis:
(1) all known quantities, including transmitting coil number m, receiving coil number n, transmitting coil impedance matrix Z are called inT
Deng；
(2) apply the voltage matrix V that order is m to transmitting coilT, measurement differenceUnder current matrix IT；
(3) complex matrix B and S are acquired；
(4) portion Q realistic to matrix S asks it to correspond to the feature vector of maximum eigenvalue matrix Q
(5) real number K and c are acquired according to above formula (1.6), then acquires transmitting coil adaptation electric current
(6) according to above formula (1.3) acquire byIt is converted into transmitting coil adaptation voltage
(7) apply voltage vector to transmitting coil
Based on the regulation process being derived from above, can realize as the control process of present invention regulation algorithm to wireless
The hardware of charging equipment is controlled.
Embodiment
The present embodiment provides a kind of multi-to-multi wireless charging device of power optimized, hardware is constituted as shown in Figure 1, 2,
Include:
Power supply unit, controller, driving unit, output unit and multiple transmitting coils；Wherein,
The power supply unit is successively electrically connected through the controller and the driving unit and the output unit, described
Output unit is electrically connected with the multiple transmitting coil respectively；
The output unit is equipped with detection signal output end, and the detection signal output end and the controller are electrically connected；
The controller can be according to the charging current and transmitting coil of the detection signal output end feedback of the output unit
Impedance state, it is dynamic according to the voltage signal and current signal after the voltage signal and current signal that are converted to transmitting coil
State regulates and controls the voltage and current of the transmitting coil, optimizes the output power of the power supply unit.
The integrated circuit of above-mentioned wireless charging device is constituted as shown in Fig. 3,4 and 5, wherein including power supply unit in Fig. 3
The oscillation control of circuit (its peripheral circuit part U1 that dotted line frame 1 is illustrated, it is preferred that LM7812 chip can be used in U1), controller
Circuit (the circuit for the part U1, U2 that dotted line frame 3 is illustrated, it is preferred that 2SC335 core can be used in U1, U2 of molding block, driving unit
Piece) emission lines that are connected with the circuit of output unit (circuit for the part Q1-Q4 that dotted line frame 4 is illustrated) and multiple parallel coupled electricals
Enclose circuit (circuit where circuit, transmitting coil L2 and resistance R2, capacitor C2 where such as transmitting coil L1 and resistance R1, capacitor C1
And circuit where transmitting coil Ln and resistance Rn, capacitor Cn).Fig. 4 illustrates part driving unit circuit.Fig. 5 illustrates to control
Single chip circuit used by device processed.
Wherein, power supply unit is made of sequentially connected rectifier circuit (referring to fig. 4) and filter regulator circuit；It can be by family
With 220V, 50HZAlternating current become stable DC source, supply subsequent entire circuit.Referring to Fig. 3, using U3 as core
For the DC power voltage stabilizing that voltage regulator circuit is used to change to 5V, wherein C2, C3, C4 are filter capacitor, can be filtered out in direct current
Low frequency and clutter component, R2 is for dividing；In entire circuit, by setting filter regulator circuit, overcurrent protection is played,
It can guarantee the equipment and the safe operation of user of service when high current in circuit.
Control unit uses single chip circuit, mainly by being sequentially connected with vibrational control module and optimization processing module,
In, vibrational control module uses oscillating circuit (signal source shown in Figure 3), can be according to the impedance of actual transmission circuit
Match, generates resonance frequency；
Optimization processing module uses single chip circuit (circuit shown in Figure 5), can be according to the detection signal of output unit
The charging current of output end feedback and the impedance state of transmitting coil, are converted to the voltage signal and current signal of transmitting coil
Afterwards, the voltage and current of the transmitting coil according to the voltage signal and current signal dynamic regulation, makes the power supply unit
Output power optimize.
Specifically, a single-chip microcontroller MSP430F149 that control unit uses Texas Instruments (TI) to produce, the present invention
Timer A, ADC12 and UART asynchronous communication module in single-chip microcontroller MSP430F149 is mainly used.Programming, which is realized, adjusts
With the high-frequency agitation source XT2 of the single-chip microcontroller, system sub-clock SMCLK frequency 1Mhz, specific clock setting such as the following table 1 institute are set
Show:
The clock source of 1 MSP430F149 of table is arranged
1) can not frequency modulation clock source frequency of oscillation it is as follows: LFXT1:32768Hz, XT2:8Mhz, ADC12OSC:5Mhz.
2) DCO clock source is adjustable, default setting (about 800Khz) is selected here, since DCO digital controlled oscillator is by ring
Border influences greatly, so actual measurement has certain error therewith.
In the sampling routine of setting, the present invention is arranged ADC12 and is sampled according to the PWM waveform that timer A is provided,
ADC12 is sampled when sampled signal waveform is in rising edge, and design timer A is worked under continuous mode, output waveform
It is set as output mode 4 (referring to Fig. 6).Due to the continuous operation mode of timer A, thus timer will from 0 cycle count to
0xFFFF i.e. 65536.Timer A is every primary by a clock cycle count, and the module working frequency is 1Mhz, therefore according to
PWM waveform hop mode, the gate time that the period of the PWM waveform is 2 times, i.e. 131072us, so the ADC of design samples journey
It is primary that sequence will be spaced about 0.13s sampling.For the data collision that may occur, setting condition of the invention is as follows, and ADC12 is to one
The unitary sampling in a channel and storage only need to expend 18 clock cycle, and ADC12 is worked under the frequency of 5Mhz, therefore the sampling
Storing process time-consuming 3.6us.If acquiring the data in 8 channels simultaneously, in addition scrappy process cycle, total time will not surpass
50us is crossed, much smaller than the sampling period of setting, so will not occur that data are also untreated, and new round sampled result has produced
Raw conflict.
Driving unit mainly uses transistor amplifier (referring to circuit shown in Fig. 3,4), has voltage amplification effect, does not have
There is Current amplifier, there is current following effect, input resistance is small, and high frequency characteristics is good.
Output unit is mainly made of metal-oxide-semiconductor (Q1-Q4), and metal-oxide-semiconductor is one of basic component of semiconductor, has electric current
Amplification is the core element of electronic circuit.According to the resonance square wave for 0~5V that oscillating circuit generates, control metal-oxide-semiconductor is opened
It is disconnected, oscillating voltage signal is amplified to 0~12V with TR1, TR2, signal will be controlled, becomes controllable power signal.The output list
Member has used detection module of the AD8302 as high-frequency detection, can obtain the voltage and electric current of receiving end, and both of which is plural number
Variable on domain.The input of the detection module be two-way high-frequency signal (1Mhz~2.7Ghz), specifically in Fig. 3 with transmitting coil
The connection of place circuit both ends, output valve is the Amplitude Ration and phase difference of two paths of signals, with the control for using single-chip microcontroller MSP430 circuit
Device processed come program realize ADC sampling and serial communication, by port processing to voltage value export to the controller as host computer
Single-chip microcontroller handled.Specifically, the rectifier circuit that output unit uses, the D grade power amplifier for having used bridge-type to connect, i.e.,
Using Q1 and Q2, Q3 and Q4 two to D grades of power amplifiers, the driving signal of two-way is reversed, keeps output stage composition complementary push-pull defeated
Structure out, ideally, the circuit is by the square-wave signal of output ± Vcc.L1 is transmitting coil in Fig. 3, and C1 is resonant capacitance
(matching 1Mhz) in practice since there are still the conducting internal resistances of ohm level for metal-oxide-semiconductor, therefore concatenates a power electricity in output end
Resistance, when preventing series resonance, the circuit LC non-resistance causes pressure drop to be all placed on metal-oxide-semiconductor, and short circuit occur causes metal-oxide-semiconductor overcurrent
The phenomenon that.
In above equipment, when the single-chip microcontroller as controller collects real time data, it is necessary to immediately transmit data
It is handled to host computer, this part will illustrate the design and implementation and truthful data of serial communication in the present invention
Format conversion.
(21) serial communication:
ADC12 has collected 12 binary data in above-mentioned single-chip microcontroller, and a corresponding voltage value is stored in ADC12
Storage register in.According to the explanation in document, this 12 bit binary data is from formula (2.1) calculating:
Wherein, V is setR+=2.5v, VR+=0,0~1.8V of output area corresponding to AD8302.
Due to the limitation of UART serial communication, disposable maximum can only transmit an ascii character i.e. 8 bits,
So the present invention chooses data of the most-significant byte of ADC12 as transmission, following formula (2.2) are obtained.
N′ADC=NADC/16 (2.2)
Range of voltages sampling to 0~2.5V, 8 sampled results can provide the sampling precision of 10mV, be able to satisfy completely
Experiment demand of the invention, while the efficiency of transmission and conversion can also be improved in this way, the low four figures of 12 ADC is reduced according to chance error
Unrelated interruptions of the difference to experimental result.
For UART serial communication, the present invention uses asynchronous communication model, once the last one memory flag bit of ADC12
Set just issues the datacycle in memory.The Configuration of baud rate of serial ports is 9600baud, the transmission of 8-bit data, verification
Position 0, stop position 1.
(22) data conversion:
According to above formula (2.1) and formula (2.2), the present invention realizes 8-bit data to the decimal system using the programming of MATLAB tool
Number is then to the conversion program of actual voltage value.
The output voltage values range of modules A D8302 be 30mV~1.8V, the logarithm and phase difference of Amplitude Ratio with electricity
Pressure value is in a linear relationship.According to corresponding handbook, draw out the module output voltage value between corresponding Amplitude Ration, phase difference
Relationship is as shown in Figure 7 and Figure 8.
In upper computer end, according to the amplitude of Fig. 7 and relation curve shown in Fig. 8 and reference signal, phase by voltage value
It is converted into the measurement voltage and phase of signal, the input as analysis and scheduler program
Since the oscillating voltage signal peak swing of square wave signal generator output is 0~5V, opened for abundant driving power
Oscillating voltage signal is amplified to 0~12V (circuit shown in Figure 9) with TR1, TR2 here by powered-down road.
Transmitting coil is mainly made of copper coil, resistance and matching capacitance, and regulatable power signal passes through emission lines
Circle generates induced magnetic field, because being resonant tank, the resistance in entire circuit is units, so can produce on individual devices
High voltage is given birth to, the electric current in entire circuit is big, and therefore, capacitor and resistance are all made of power capacity and power resistor.Receiving coil
Place circuit receives transmitting coil and is transmitted through the power come by induced magnetic field, in order to reduce energy along number, by resistance and capacitor
Matching, generate the resonant tank of receiving coil, then pass through receiving coil pressure stabilizing rectification circuit, received alternating current is become
For stable DC source, electrical equipment is supplied.
In above-mentioned charging equipment, power supply unit, controller, driving unit, output unit circuit used by circuit board
It is all made of upper and lower two layers and increases the circuit board of ground plane, diode circuit and buffering capacitor are added in earthed circuit, in this way
Enable the input terminal of input control signal under high frequency state, preferably shields influence of other signals to control signal, make
Output end obtains more stable and reliable waveform.In circuit board line arrangement, using the thick copper lines for being more than or equal to 2.5mm, and
Increase ground wire in thick copper lines two sides, high current can be born by both having shielded the interference of other signals in this way or having can guarantee in circuit board.
In above-mentioned charging equipment, on the transmit circuit used in driving unit, output unit, to avoid the state in high frequency
Metal-oxide-semiconductor is caused to generate heat for the lower on-off for carrying out internal circuit and the unnecessary energy consumption of formation, the present invention use three pole of high frequency
Pipe can make metal-oxide-semiconductor field effect transistor be connected and block under HF switch state, improve conducting voltage, increase the conducting speed of metal-oxide-semiconductor
Rate, while filter capacitor being added on peripheral circuit, the level hair that when reducing level change generates independently-powered using dual power supply
Thorn, allows triode and metal-oxide-semiconductor timely on-off as far as possible, reduces the energy consumption of component.
Although the waveform and frequency of charging equipment output in the market can guarantee normally to export, when work is distortionless to be wanted
Ask, but the power exported is relatively low, only 1~2W, and develop in the charging equipment of multi-to-multi it is less, when the frequency model of output
It is trapped among 2MHz or more, variation range is easy distortion in ± 0.5MHz, output waveform.Output unit of the invention is using metal-oxide-semiconductor electricity
Road is able to achieve the high-power output of 20W, and frequency can stablize output in 2MHz, comply fully with big function at high frequencies
The optimization of the power and frequency needs of rate wireless charging, the power being able to achieve in the case where multi-emitting end and more receiving ends passes
It is defeated.The electronic component that the reaction time is short, equivalent capacity is small in addition, present device can be used, can meet high frequency characteristics requirement, keep away
Exempt from easily to generate branch's capacitor on the biggish component of volume, severe jamming is generated to the transmission of high-frequency signal.
The present invention is matched in transmitting with receiving coil, is carried out resonance matching by tranmitting frequency, is reduced entire circuit
Impedance, and the bigbore transmitting coil of pure copper material coiling is used, the energy dissipation of coil is reduced, this also increases magnetic fluxs
Amount, expands the range of charging, copper wire can also load the high current in high pressure and circuit；In entire circuit, the present invention passes through
Filter regulator circuit is set, plays overcurrent protection, guarantees the safe operation of equipment and user of service of the invention.
In order to maximumlly using the energy sensed, it is received back using the electrical equipment of wireless charging device of the present invention
Full-bridge rectification (circuit illustrated in Figure 6 preferably can be used in the reception circuit of electrical equipment) can be used in road, utilizes the two of low-power consumption
Pole pipe and ceramic condenser simplify and receive circuit, and then reach higher capacity usage ratio.
Advantages of the present invention effect are as follows:
(1) in effective range, maximize the efficiency of transmission of whole equipment；
(2) do not limited by interface, if support uniform agreement (such as Qi standard [1]) can to equipment charge,
It realizes and charges to multiple devices；
(3) equipment can be used in charging process safely, avoid Danger Electric shock risk；
(4) battery loss is reduced, it can be to equipment continued power, hardly consumption battery capacity in wireless charging area；
(5) due to using wireless charging mode, it is not provided with exposed slot, many products can be made completely enclosed anti-
Dirt waterproof construction, enhancing appearance improve durability；
(6) it without plug, that is, puts and fills, avoid hardware damage caused by frequent connecting-disconnecting interface.
In conclusion the letter of combination and circuit between the component that wireless charging device of the invention passes through hardware circuit
Change, using applicable material, cooperate the regulation algorithm of optimization, ensure that high efficiency energy transmission and utilize, is able to achieve efficient more
To more wireless chargings, there is broader prospect and market value.
Those of ordinary skill in the art will appreciate that: realizing that all or part of the process in above-described embodiment method is can be with
Relevant hardware is instructed to complete by program, the program can be stored in a computer-readable storage medium, should
Program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic disk, light
Disk, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access Memory,
RAM) etc..
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Within the technical scope of the present disclosure, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (8)
1. a kind of multi-to-multi wireless charging device of power optimized characterized by comprising
Power supply unit, controller, driving unit, output unit and multiple transmitting coils；Wherein,
The power supply unit is successively electrically connected through the controller and the driving unit and the output unit, the output
Unit is electrically connected with the multiple transmitting coil respectively；
The output unit is equipped with detection signal output end, and the detection signal output end and the controller are electrically connected；
The controller can be according to the charging current of the detection signal output end feedback of the output unit and the resistance of transmitting coil
Anti- state after the voltage signal and current signal that are converted to transmitting coil, is adjusted according to the voltage signal and current signal dynamic
The voltage and current for controlling the transmitting coil optimizes the output power of the power supply unit.
2. the multi-to-multi wireless charging device of power optimized according to claim 1, which is characterized in that the controller
Include:
Sequentially connected vibrational control module and optimization processing module；Wherein,
The vibrational control module is electrically connected with the D.C. regulated power supply output end of the power supply unit, is equipped with electrical output
End is electrically connected with the driving unit, which is used for when DC power supply is converted into AC power source, provides vibration
Frequency is swung, DC power supply is made to be converted into the AC power source that can regulate and control；
The optimization processing module is electrically connected, for receiving the output with the detection signal output end of the output unit
The charging current of the detection signal output end feedback of unit and the impedance state of transmitting coil, are converted to the voltage letter of transmitting coil
Number and current signal after, according to the voltage and current of transmitting coil described in the voltage signal and current signal dynamic regulation, make
The output power of the power supply unit optimizes.
3. power optimized multi-to-multi wireless charging device according to claim 2, which is characterized in that the controller
The circuit board that vibrational control module uses is upper and lower two layers and increases ground plane, in earthed circuit be added diode circuit and
Buffer capacitor.
4. power optimized multi-to-multi wireless charging device according to claim 1 or 2, which is characterized in that the control
The voltage and current of device transmitting coil according to the voltage signal and current signal dynamic regulation, makes the power supply unit
Output power optimizes are as follows:
Step 1) obtains transmitting coil number m, the receiving coil number n of electrical equipment and the impedance matrix Z of transmitting coilT；
Step 2) applies the voltage matrix V that order is m to whole transmitting coilsT, measure different voltages vectorUnder current matrix
IT；
Step 3) acquires complex matrix B and S；
Step 4) portion Q realistic to complex matrix S asks it to correspond to the feature vector of maximum eigenvalue matrix Q
Step 5) basisReal number K and c are acquired, transmitting coil adaptation electric current is then acquired
Step 6) basisAcquiring willIt is converted into transmitting coil adaptation voltage
Step 7) Xiang Suoshu transmitting coil applies voltage vectorRealization optimizes the output power of the power supply unit.
5. the multi-to-multi wireless charging device of power optimized according to claim 1 or 2, which is characterized in that the electricity
Source unit includes:
Sequentially connected rectification circuit and filter regulator circuit；Wherein,
The rectification circuit is equipped with AC power source incoming end；
The filter regulator circuit is equipped with D.C. regulated power supply output end, the D.C. regulated power supply output end and controller electricity
Gas connection.
6. the multi-to-multi wireless charging device of power optimized according to claim 1 or 2, which is characterized in that described defeated
Unit includes: out
Detection module and inverter；Wherein,
The detection module and the inverter are electrically connected, which is arranged the detection signal output end；
The inverter is equipped with multiple output ends, and each output end is electrically connected a transmitting coil.
7. the multi-to-multi wireless charging device of power optimized according to claim 1 or 2, which is characterized in that the drive
Moving cell uses high-frequency triode driving circuit or metal-oxide-semiconductor driving circuit.
8. a kind of power optimized multi-to-multi wireless charging control method, which is characterized in that be applied to as claimed in claim 1 or 2
Power optimized multi-to-multi wireless charging device, comprising the following steps:
Step 1) obtains the impedance matrix Z of transmitting coil number m, electrical equipment receiving coil number n and transmitting terminalT；
Step 2) applies the voltage matrix V that order is m to each transmitting terminalT, measure different voltages vectorUnder current matrix IT；
Step 3) acquires complex matrix B and S；
Step 4) portion Q realistic to complex matrix S asks it to correspond to the feature vector of maximum eigenvalue matrix Q
Step 5) basisReal number K and c are acquired, transmitting terminal adaptation electric current is then acquired
Step 6) basisAcquiring willIt is converted into transmitting coil adaptation voltage
Step 7) Xiang Suoshu transmitting coil applies the adaptation voltage vectorRealization makes the output power of the power supply unit most
Optimization.
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