CN103457362B - The dispensing device of wireless charging, wireless charging system and wireless charging control method - Google Patents
The dispensing device of wireless charging, wireless charging system and wireless charging control method Download PDFInfo
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Abstract
The invention provides a kind of dispensing device of wireless charging, wireless charging system and charge control method thereof, dispensing device comprises: transmitting coil, for launching the electric energy of dispensing device; Vibration and FM module, produce LC resonance for transmitting coil, and regulate the humorous center of percussion capacitance of LC to change the resonance frequency of LC resonance; Transmitting terminal sampling module, gathers voltage and the electric current of dispensing device; First control module, according to the resonance frequency of LC resonance in the vibration of predetermined mode of frequency regulation regulating and controlling and FM module, and according to resonance frequency corresponding to the most high recharge efficiency of the voltage of the voltage of the dispensing device collected, electric current and receiving system and current stabilization and the energy process of transmitting controlling charging; First communication module, for the radio communication of data between dispensing device and receiving system; And power module.This dispensing device, charging system and charge control method can realize the resonance frequency regulating LC resonance, thus have the advantage of the charge efficiency improving charging system.
Description
Technical field
The present invention relates to a kind of wireless charging field, particularly relate to a kind of dispensing device of wireless charging, wireless charging system and wireless charging control method thereof.
Background technology
At present, the range of application of mobile terminal is more and more extensive, and it has powerful function and fabulous convenience, such as mobile phone, IPAD, rechargeable 3D glasses, and it has abundant recreational, can see TV, online, singing etc.In the process using mobile terminal, due to the limitation of battery capacity, the electricity of battery will soon run out, the flying power being such as subject to the battery of the mobile phone with Android system that user warmly pursues at present is relatively poor, need to charge frequently, so need often to bring reserve battery or wired charger.A lot of mobile terminal needs to carry with wired charger to charge the battery, and wired charger is wired and more loaded down with trivial details owing to being with, more notably be, different mobile terminals often needs the charger of specific different model to charge, therefore, the people that many users such as go on business often will with the charger of the mobile terminals such as the mechanical, electrical brain of left-hand seat, shaver, and the wired charger of miscellaneous complexity brings great inconvenience to the use of consumer.
So the loaded down with trivial details wireless charger that consumer can be allowed to reduce the constraint of electric wire and the charger of One's name is legion obtains the favor of consumer, and it has good market prospects.Wireless charger mainly utilizes electromagnetic induction principle, see Fig. 1, it is the theory diagram of wireless charging system in prior art, be provided with in wireless charging device and send coil for being sent by the energy of power supply, receiving coil is provided with in mobile terminal to be charged, by applying the electric current of change with the electromagnetic field changed in transmission coil, the electromagnetic field couples then changed is to receiving coil, so create charging current in receiving coil, thus realize the wireless charging to mobile terminal.
But the present inventor is studying prior art and is finding in practice process: the charged state of the dispensing device of existing wireless charging can be subject to dispensing device self and the external influence thereof of wireless charging, so that its charge efficiency is lower.Such as dispensing device can be applied to the receiving system of various ways, when the relative position of receiving system and dispensing device changes, it all can make the charge efficiency of dispensing device and receiving system change, and the electric energy that dispensing device is launched may be reflected or part loses with the form of coil heating.So current wireless charging system exists more energy dissipation, its charge efficiency is general lower.
Be understandable that, the statement of this part only provides background information related to the present invention, may form or not form so-called prior art.
Summary of the invention
Technical problem to be solved by this invention is for the lower defect of the charge efficiency of wireless charging system in prior art, provide a kind of can feeding back charging status adjustable resonance frequency to improve the dispensing device of the wireless charging of charge efficiency.
The technical solution adopted for the present invention to solve the technical problems is to provide a kind of dispensing device of wireless charging, and it mainly comprises:
Transmitting coil, for launching the electric energy of dispensing device;
Vibration and FM module, produce LC resonance for transmitting coil, and regulate the humorous center of percussion capacitance of LC to change the resonance frequency of LC resonance;
Transmitting terminal sampling module, for gathering voltage and the electric current of described dispensing device;
First control module, for the resonance frequency of LC resonance in vibration according to predetermined mode of frequency regulation regulating and controlling and FM module, and according to resonance frequency corresponding to the most high recharge efficiency of the voltage of the voltage of the dispensing device collected, electric current and receiving system and current stabilization and the energy process of transmitting controlling charging.
First communication module, for the radio communication of data between dispensing device and receiving system;
Power module, provides required driving power for giving described dispensing device.
In the dispensing device of above-mentioned wireless charging, described first control module comprises:
Translation operation module, the data for the dispensing device that will collect and receiving system carry out analog-to-digital conversion, and calculate charge efficiency according to data after analog-to-digital conversion, and compare the most high recharge efficiency in all charge efficiencies;
Memory module, for storing above-mentioned charge efficiency and capacitance corresponding to this charge efficiency;
First single-chip microcomputer, for controlling the resonance frequency in above-mentioned vibration and FM module according to predetermined mode of frequency regulation and the capacitance making vibration and FM module stablize to export most high recharge efficiency corresponding, and controls the energy process of transmitting of charging.
In the dispensing device of above-mentioned wireless charging, the described energy process of transmitting controlling charging comprises: control the driving power provided needed for each module, and control the start and stop of energy transmission.
In the dispensing device of above-mentioned wireless charging, described predetermined mode of frequency regulation to refer in the interval of 110KHZ-205KHZ with the resonance frequency of 110KHZ for benchmark, and increases progressively resonance frequency with the speedup of 1% to 1.5%.
In the dispensing device of above-mentioned wireless charging, described vibration and FM module comprise:
Tunable capacitor module, for providing adjustable electric capacity and producing LC resonance with described transmitting coil;
Inversion module, the direct current for exporting above-mentioned power module is converted to the alternating current carrying out resonance for tunable capacitor module and transmitting coil;
Second control module, the control signal for exporting according to described first control module regulates the electric capacity of described tunable capacitor module and controls the inversion of inversion module.
In the dispensing device of above-mentioned wireless charging, described tunable capacitor module is the capacitance matrix of multiple electric capacity composition.
In the dispensing device of above-mentioned wireless charging, described second control module comprises:
Switch matrix, for the whether access circuit of electric capacity in the above-mentioned capacitance matrix of control of correspondence;
Pulse width modulation module, provides the pulse signal needed for inversion module to drive inversion module for the control signal exported according to the first control module;
Second singlechip, the control signal exported according to the first control module controls the break-make of each switch in the work of pulse-width modulation circuit and control switch matrix.
In order to better solve the technical problem, present invention also offers a kind of wireless charging system, comprise dispensing device and receiving system, described receiving system comprises:
Receiving coil, is coupled for carrying out electromagnetic induction with transmitting coil in dispensing device;
Rectification and communication module, the AC rectification for being received by receiving coil is charge to charging load after direct current and carry out radio communication with dispensing device;
Receiving terminal sampling module, for gathering voltage and the electric current of described receiving system;
Described dispensing device is above-mentioned dispensing device.
In order to better solve the problems of the technologies described above, present invention also offers a kind of charge control method of wireless charging system, it comprises the following steps successively:
S1, with one reference frequency start charging process;
S2, in predetermined resonant frequency range, according to the humorous center of percussion capacitance of predetermined mode of frequency regulation control LC to regulate the resonance frequency of LC resonance in vibration and FM module and the voltage of the voltage of dispensing device, electric current and receiving system and electric current under gathering this capacitance;
S3, to draw most high recharge efficiency and optimum capacitance value corresponding to most high recharge efficiency according to the above-mentioned data processing collected;
S4, control make vibration and the above-mentioned optimum capacitance value of the stable output of FM module, with stable LC resonance frequency.
The dispensing device of wireless charging provided by the invention, its by first control module control vibration and FM module in capacitance to change LC resonance frequency, and pass through the electric current and voltage of transmitting terminal sampling module dynamic acquisition dispensing device, and draw charge efficiency according to the electric current and voltage of receiving system that wireless transmission is come, then by most high recharge efficiency that the first control module draws in predetermined resonant frequency range, and optimum capacitance value, thus will vibrate and FM module steady operation under this most high recharge efficiency state, and then greatly can improve the charge efficiency of wireless charging system.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the wireless charging system that prior art provides;
Fig. 2 is the theory diagram of the dispensing device of wireless charging system provided by the invention;
Fig. 3 is the theory diagram of the wireless charging system that the embodiment of the present invention provides;
Fig. 4 is the structured flowchart of the dispensing device of the wireless charging system that one embodiment of the present invention provides;
Fig. 5 is the structured flowchart of the receiving system of the wireless charging system that one embodiment of the present invention provides;
Fig. 6 is the first control module of the wireless charging system that one embodiment of the present invention provides and the structured flowchart of periphery thereof;
Fig. 7 is the theory diagram of vibration and FM module in the wireless charging system that provides of the embodiment of the present invention;
Fig. 8 is the structural representation of vibration and FM module in the wireless charging system that provides of the embodiment of the present invention;
Fig. 9 is the flow chart of the charge control method of wireless charging system provided by the invention.
Embodiment
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The dispensing device of wireless charging provided by the invention combines mainly through the first control module and changes LC resonance frequency to the control of vibration and FM module and can better be utilized with the energy making dispensing device launch, and then improves charge efficiency.
See shown in Fig. 2 to Fig. 8, the dispensing device of wireless charging provided by the invention comprises: for launching the transmitting coil 6 of the electric energy of dispensing device, for regulating the resonance frequency of LC resonance and making transmitting coil 6 produce vibration and the FM module 5 of LC resonance, for the transmitting terminal sampling module 2 of the voltage and electric current that gather dispensing device, for the first communication module 4 of the radio communication of data between dispensing device and receiving system, for providing the power module 1 of the driving power in dispensing device needed for each module, also comprise the first control module 3 that whole dispensing device is controlled.First control module 3 be connected to transmitting terminal sampling module 2 and vibration and FM module 5 between, its electric current and voltage for the dispensing device that collects according to the resonance frequency of LC resonance in the vibration of predetermined mode of frequency regulation regulating and controlling and FM module 5 and according to transmitting terminal sampling module 2 and receiving system carrys out the resonance condition of stable oscillation stationary vibration and FM module 5, make vibration and FM module 5 change LC resonance frequency to optimum state, the electric energy gone out from LC resonance the most effectively can be transmitted to receiving system by transmitting coil 6.Specifically, first control module 3 changes the resonance frequency of LC resonance according to predetermined mode of frequency regulation, and gather the work state information of dispensing device and receiving system, first control module 3 draws the power output of dispensing device according to the information of the dispensing device collected, the input power of receiving system is drawn according to the information of the receiving system collected, and then draw charge efficiency, wherein, the resonance frequency that most high recharge efficiency is corresponding and optimum resonance frequency, first control module 3 sends control information to vibration and FM module 5, identical with above-mentioned optimum resonance frequency to make the resonance frequency in vibration and FM module 5 be adjusted to.Thus vibration and FM module 5 are stabilized in electric energy that this optimum resonance frequency can make dispensing device launch the most received device receive, thus make wireless charging system be held in the highest charge efficiency state.
In concrete enforcement, with reference to Fig. 7, vibration and FM module 5 can comprise: tunable capacitor module 20, inversion module 22 and the second control module 21.The electric capacity of tunable capacitor module 20 can regulate, when capacitance adjustment is to required capacitance, the LC resonance frequency that electric capacity and transmitting coil 6 are formed can make dispensing device work in optimum resonance frequency, thus the energy after LC resonance can be launched, and coil 6 is more effective to be launched.Inversion module 22, the direct current for exporting above-mentioned power module 1 is converted to the alternating current carrying out resonance for tunable capacitor module 20 and transmitting coil 6.Second control module 21 is controlled by the instruction of the first control module 3 to the reversals of the capacitance and inversion module 22 that regulate tunable capacitor module 20.
Preferably, tunable capacitor module 20 is the capacitance matrix of multiple electric capacity composition; Second control module comprises: switch matrix, pulse width modulation module and second singlechip.Electric capacity one_to_one corresponding in switch in switch matrix and above-mentioned capacitance matrix, so that the whether access circuit of each electric capacity in control capacitance matrix, namely it decides the final capacitance of tunable capacitor module 20 by controlling which electric capacity access circuit; Pulse width modulation module is for providing the pulse signal needed for inversion module 22 to drive inversion module 22.It is closed or disconnect that the control signal that second singlechip exports according to the first control module 3 controls which switch in the work of pulse width modulation module and control switch matrix, and it realizes mainly through program control.The technology that pulse width modulation module and inversion module 22 are well known to those skilled in the art, does not repeat them here.
First control module 3 comprises translation operation module, memory module and the first single-chip microcomputer.Wherein, the data that dispensing device and receiving system collect by translation operation module carry out analog-to-digital conversion, and according to the above-mentioned data collected calculate the power output of dispensing device, the input power of receiving system, charging system charge efficiency (i.e. the ratio of input power and power output) and compare the most high recharge efficiency calculated in charge efficiency.The capacitance of the memory module at least charge efficiency that calculates of recording gauge and the humorous center of percussion of LC corresponding to this charge efficiency.First single-chip microcomputer, its regulate change LC resonance in vibration and FM module 5 resonance frequency, when getting capacitance corresponding to most high recharge efficiency, control to make vibration and FM module 5 is stable exports this capacitance, with stable resonant oscillation frequency.Meanwhile, the first single-chip microcomputer also controls the energy process of transmitting of whole charging.Such as, control the driving power provided needed for each module, and control the start and stop of energy transmission.The conversion of power supply and the Power convert of inversion module 22 in its controllable power module 1.Preferably, the first single-chip microcomputer also can connect LCD display module and host computer with better Monitor and Control charging process.
What deserves to be explained is, alternating current due to inversion module 22 output is directly used in and makes transmitting coil 6, with electric capacity in tunable capacitor module 20, LC resonance occur, so, only have frequency when resonance frequency exports closest to inversion module 22 (namely transmitting coil 6 tranmitting frequency or claim charge frequency) time, the maximization of charge efficiency when the dispensing device of guarantee equal state and receiving device.Such as, in concrete enforcement, wireless charging standard regulation charge frequency is necessary for 110-205KHZ, so, the present invention on one side frequency modulation (namely adjusting resonance frequency) while charge efficiency under gathering this resonance frequency, the present invention makes resonance frequency in vibration and FM module 5 change in the scope of 110-205KHZ, finds out resonance frequency and when can ensure that charge efficiency is the highest.Preferably, when changing resonance frequency in vibration and FM module 5, elder generation for benchmark, makes resonance frequency in vibration and FM module 5 be 110KHZ with the resonance frequency of 110KHZ, and charge efficiency under recording this state.Then, by resonance frequency on the basis of 110KHZ with the range incrementation of 1% to 1.5% to 205KHZ.More preferably, its with 1% speed increase to 205KHZ, to find out optimum resonance frequency (resonance frequency namely under most high recharge efficiency) more fast and accurately.
Present invention also offers a kind of wireless charging system, see Fig. 3, it comprises above-mentioned dispensing device, also comprises receiving system, and described receiving system comprises: receiving coil 9, is coupled for carrying out electromagnetic induction with transmitting coil in dispensing device 6; Rectification and communication module 8, the AC rectification for being received by receiving coil 9 is charge to charging load 7 and carry out radio communication with dispensing device after direct current; Receiving terminal sampling module 10, for gathering voltage and the electric current of described receiving system.What deserves to be explained is, receiving terminal sampling module 10 can be installed on receiving coil 9 place, also can be installed on charging load 7 place, and in like manner, above-mentioned transmitting terminal sampling module 2 can be installed on transmitting coil 6 place, also can be installed on power module 1 place.The power supply exported due to power module 1 needs can there is partition losses through a series of process, the electric energy that receiving coil 9 receives just is supplied to charging load 7 and charges after being also subject to some losses impact, so transmitting terminal sampling module 2 and receiving terminal sampling module 10 to be installed on respectively the charge efficiency that power module 1 place and charging load 7 place can better draw charging system.Above-mentioned power module 1 is powered to modules, such as provide the driving DC voltage needed for it to the first single-chip microcomputer, second singlechip and transmitting terminal sampling module 2, driving voltage needed for each module is different, power module 1 comprises the modular converter changed civil power or other power supply of such as 220V, it is well known to those skilled in the art, and does not repeat them here.
Preferably, wireless charging system additionally provides the device protected charging process.Such as: charging system also comprises the temperature collect module be arranged on dispensing device and/or receiving system and the first switch charged for stopping during excess temperature.Temperature collect module can be the common components such as temperature sensor.First switch is normally off, safe temperature predetermined in the temperature collected and single-chip microcomputer compares by the first controller, when the temperature collected exceedes predetermined safety temperature, first control module 3 exports control signal and is disconnected by the first switch, disconnects with transmitting coil 6 to make vibration and FM module 5.Wireless charging system also can comprise and is arranged at rectification and the second switch between communication module 8 and receiving coil 9, principle is same as above, when the voltage of the receiving system collected or electric current exceed predetermined safety value (overcharging), the first control module 3 exports control signal and is disconnected by second switch.First switch and second switch play and stop charging to carry out charge protection, and be understandable that, its installation site is not limited to technique scheme.Preferably, the first control module 3 and the electrical isolation module be provided with between the first switch, second switch, transmitting terminal sampling module 2 and receiving terminal sampling module 10 for Secure isolation, to protect charging process.Above-mentioned first switch, second switch and electrical isolation module are the conventional element in this area or device, and it is well known to those skilled in the art, and does not repeat them here.
Present invention also offers the charge control method of wireless charging system, it mainly comprises the following steps successively:
S1, startup charging process;
S2, frequency modulation and sampling: in predetermined resonant frequency range, according to the humorous center of percussion capacitance of predetermined mode of frequency regulation control LC to regulate the resonance frequency of LC resonance in vibration and FM module 5 and the voltage of the voltage of dispensing device, electric current and receiving system and electric current under gathering this capacitance;
At present, in predetermined resonant frequency range, main finger is 110KHZ to 205KHZ according to charge frequency in wireless charging standard is a frequency modulation and sampling period, namely regulates resonance frequency to make it change resonance frequency in certain proportion until the frequency range of 110KHZ to 205KHZ is all conditioned exported.
S3, obtain optimum capacitance value: according to the most high recharge efficiency of the above-mentioned data acquisition collected and optimum capacitance value corresponding to most high recharge efficiency;
S4, stablize LC resonance frequency: control to make vibration and FM module 5 is stable exports above-mentioned optimum capacitance value, with stable LC resonance frequency.
Embodiment shown in Figure 9 illustrates charge control method provided by the invention.In this embodiment, predetermined mode of frequency regulation can by the interval of 110KHZ-205KHZ, with the resonance frequency of 110KHZ for benchmark, and with 1% to 1.5% range incrementation resonance frequency.Its concrete charging control process is as follows: first, by changing the capacitance of LC resonance in vibration and FM module 5, start when making its resonance frequency be 110KHZ to charge (this 110KHZ is reference frequency, and it is by the programming be arranged in the first control module 3); Then, gather voltage and the electric current of the voltage of now dispensing device, electric current and receiving system, and regulating and controlling is vibrated and capacitance in FM module 5, the frequency of LC resonance is made to be 115KHZ and the voltage of the voltage of dispensing device, electric current and receiving system and electric current under recording this frequency, then again resonance frequency is regulated to be 120KHZ, 125KHZ, resonance frequency is changed and record charged state at that time, until it is a frequency modulation and sampling period that resonance frequency is adjusted to 205KHZ according to this increasing velocity; And then, draw most high recharge efficiency and optimum capacitance value corresponding to most high recharge efficiency according to the electric current and voltage collected, finally the fixing capacitance exported under this most high recharge efficiency, thus under charging system being stabilized in the operating state of most high recharge efficiency.
Because the inductance value of transmitting coil 6 can change with environment, such as, when being placed in more remote by receiving system, receiving coil 9 and transmitting coil 6 are directly coupled and L value can be made to finely tune.So preferably, frequency modulation is by regulating capacitance matrix to change the humorous center of percussion capacitance of LC, and then changes the resonance frequency of LC resonance, to be adjusted to optimum charged state more accurately.
In concrete enforcement, step S2 also can comprise the temperature gathering dispensing device and/or receiving system, and judges whether excess temperature in step s3, if excess temperature, then stops charging.Such as, when the temperature that the first controller gets exceedes predetermined temperature, it sends instruction and disconnects the first switch.Preferably, step S3 also can comprise and judges whether to overcharge according to the data of above-mentioned collection, if overcharged, then stops charging.Such as, when the voltage of the receiving system collected or electric current exceed predetermined safety value, the first control module 3 output order makes second switch disconnect stopping charging.
Embodiment shown in composition graphs 2 to Fig. 8 again, is described in detail as follows the operation principle of dispensing device provided by the invention and charging system:
As shown in Figure 4, transmitting terminal sampling module comprises: current monitoring circuit, and it is made up of current sense resistor R1 and differential amplifier circuit; Electric voltage observation circuit, forms potential-divider network primarily of divider resistance R2, R3; The output terminals A 1 of differential amplifier circuit is by the AD input A1 port of electrical isolation model calling to the first single-chip microcomputer, and the voltage that electric voltage observation circuit gathers is by the AD input A2 of electrical isolation model calling to the first single-chip microcomputer.Like this, can prevent potential-divider network and net control from mutually disturbing, to obtain stable electric current and voltage value, the power output of dispensing device can be drawn according to this electric current and voltage value.In like manner, receiving terminal detects the electric current of receiving terminal by current monitoring resistance R4 and amplifier, and the output terminals A 3 of differential amplifier circuit is by the AD input A3 port of electrical isolation model calling to the first single-chip microcomputer; Divider resistance R5, R6 form potential-divider network, and the voltage after dividing potential drop to the AD input A4 of the first single-chip microcomputer, draws the input power of receiving terminal by electrical isolation model calling according to the electric current and voltage of the receiving terminal detected.According to the change of input power and power output, the charging change procedure of wireless charging network can be monitored.
Illustrate that transmitting terminal charging regulating strategy is as follows by specific embodiment: resonance frequency adjusts from the frequency separation of 110kHz ~ 205kHz, when 110kHz ~ 175kHz frequency separation, based on 110KHZ, resonance frequency is increased progressively with 1% ratio, when 175kHz ~ 205kHz frequency separation, increase progressively resonance frequency with 2% ratio.Until a frequency modulation and sampling period complete (namely resonance frequency is incremented to 205KHZ from 110KHZ is a frequency modulation and sampling period), find out capacitance during most high recharge efficiency, control stablely to export this capacitance, with stable resonant oscillation frequency.
In sum, the dispensing device of wireless charging provided by the invention and wireless charging system can adjust different charge conditions, its Real-Time Monitoring adjustment wireless charging strategy, make wireless charging system charge with the most high recharge efficiency under this system.It adopts Intelligent closed-loop feedback system to carry out optimization to charge efficiency, greatly can improve the charge efficiency of whole system, and in addition, it adopts excess temperature and over-charge protective, ensure that the charging safety of whole charging system.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
In describing the invention, unless otherwise prescribed and limit, it should be noted that, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1. a dispensing device for wireless charging, is characterized in that, comprising:
Transmitting coil, for launching the electric energy of dispensing device;
Vibration and FM module, for driving transmitting coil to produce LC resonance, and regulate the humorous center of percussion capacitance of LC to change the resonance frequency of LC resonance;
Transmitting terminal sampling module, for gathering voltage and the electric current of described dispensing device;
First control module, for the resonance frequency of LC resonance in vibration according to predetermined mode of frequency regulation regulating and controlling and FM module, and according to resonance frequency corresponding to the most high recharge efficiency of the voltage of the voltage of the dispensing device collected, electric current and receiving system and current stabilization and the energy process of transmitting controlling charging;
First communication module, for the radio communication of data between dispensing device and receiving system; And
Power module, provides required driving power for giving described dispensing device;
Described first control module comprises: translation operation module, analog-to-digital conversion is carried out for the voltage of the dispensing device that will collect and receiving system and current data, and calculate charge efficiency according to the data after analog-to-digital conversion, and compare the most high recharge efficiency in all charge efficiencies; Memory module, for storing above-mentioned charge efficiency and capacitance corresponding to this charge efficiency; And first single-chip microcomputer, for controlling the resonance frequency in above-mentioned vibration and FM module according to predetermined mode of frequency regulation and the capacitance making vibration and FM module stablize to export most high recharge efficiency corresponding, and control the energy process of transmitting of charging.
2. the dispensing device of wireless charging as claimed in claim 1, is characterized in that, the described energy process of transmitting controlling charging comprises: control the driving power provided needed for each module, and the start and stop that control energy sends.
3. the dispensing device of wireless charging as claimed in claim 1 or 2, it is characterized in that, described predetermined mode of frequency regulation is: in the interval of 110KHZ-205KHZ with the resonance frequency of 110KHZ for benchmark, and increase progressively resonance frequency with the speedup of 1% to 1.5%.
4. the dispensing device of wireless charging as claimed in claim 1, it is characterized in that, described vibration and FM module comprise:
Tunable capacitor module, for providing adjustable electric capacity and producing LC resonance with described transmitting coil;
Inversion module, the direct current for exporting above-mentioned power module is converted to the alternating current carrying out resonance for tunable capacitor module and transmitting coil;
Second control module, the control signal for exporting according to described first control module regulates the electric capacity of described tunable capacitor module and controls the inversion of inversion module.
5. the dispensing device of wireless charging as claimed in claim 4, is characterized in that, described tunable capacitor module is the capacitance matrix of multiple electric capacity composition.
6. the dispensing device of wireless charging as claimed in claim 5, it is characterized in that, described second control module comprises:
Switch matrix, for controlling in above-mentioned capacitance matrix electric capacity whether access circuit accordingly;
Pulse width modulation module, provides the pulse signal needed for inversion module to drive inversion module for the control signal exported according to the first control module;
Second singlechip, the control signal exported according to the first control module controls the break-make of each switch in the work of pulse-width modulation circuit and control switch matrix.
7. a wireless charging system, comprises dispensing device and receiving system, and described receiving system comprises:
Receiving coil, is coupled for carrying out electromagnetic induction with transmitting coil in dispensing device;
Rectification and communication module, the AC rectification for being received by receiving coil is to charging load charging after direct current, and carries out radio communication with dispensing device;
Receiving terminal sampling module, for gathering voltage and the electric current of described receiving system;
It is characterized in that, the dispensing device of described dispensing device according to any one of the claims 1-6.
8. wireless charging system as claimed in claim 7, is characterized in that, also comprise:
Be arranged at the temperature collect module on described dispensing device and/or receiving system; And
When the temperature collected exceedes predetermined safety temperature according to the first switch that vibration and FM module and transmitting coil disconnect by the control signal of the first control module.
9. wireless charging system as claimed in claim 8, it is characterized in that, described rectification and be provided with second switch between communication module and receiving coil, disconnects rectification and communication module and receiving coil according to the control signal of the first control module during for exceeding predetermined safety value when the voltage or electric current that collect receiving system.
10. wireless charging system as claimed in claim 9, is characterized in that, described first control module and the electrical isolation module be provided with between described first switch, second switch, transmitting terminal sampling module and receiving terminal sampling module for Secure isolation.
The charge control method of 11. 1 kinds of wireless charging systems, is characterized in that, comprises the following steps successively:
S1, with one reference frequency start charging process;
S2, in predetermined resonant frequency range, according to the humorous center of percussion capacitance of predetermined mode of frequency regulation control LC to regulate the resonance frequency of LC resonance in vibration and FM module and the voltage of the voltage of dispensing device, electric current and receiving system and electric current under gathering this capacitance;
S3, to draw most high recharge efficiency and optimum capacitance value corresponding to most high recharge efficiency according to the above-mentioned voltage that collects and current data process;
S4, control make vibration and the above-mentioned optimum capacitance value of the stable output of FM module, with stable LC resonance frequency.
12. charge control methods as claimed in claim 11, is characterized in that, described frequency modulation changes the humorous center of percussion capacitance of LC, to regulate the resonance frequency of LC resonance by control capacittance matrix.
13. charge control methods as claimed in claim 11, is characterized in that, described step S2 also comprises the temperature gathering dispensing device and/or receiving system, and judges whether excess temperature in step s3, if excess temperature, then stop charging.
14. charge control methods as claimed in claim 11, is characterized in that, described step S3 also comprises and judges whether to overcharge according to the voltage of the above-mentioned receiving system collected and electric current, if overcharged, then stops charging.
15. charge control methods according to any one of claim 12 to 14, it is characterized in that, described predetermined mode of frequency regulation is: in the interval of 110KHZ-205KHZ with the resonance frequency of 110KHZ for benchmark, and increase progressively resonance frequency with the speedup of 1% to 1.5%.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210180427.5A CN103457362B (en) | 2012-06-04 | 2012-06-04 | The dispensing device of wireless charging, wireless charging system and wireless charging control method |
| PCT/CN2013/075723 WO2013181985A1 (en) | 2012-06-04 | 2013-05-16 | Transmitting device, wireless charging system comprising transmitting device and method for controlling charging process thereof |
| EP13799883.7A EP2856608A4 (en) | 2012-06-04 | 2013-05-16 | Transmitting device, wireless charging system comprising transmitting device and method for controlling charging process thereof |
| US14/550,799 US20150200563A1 (en) | 2012-06-04 | 2014-11-21 | Transmitting device, wireless charging system comprising transmitting device, and method for controlling charging process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210180427.5A CN103457362B (en) | 2012-06-04 | 2012-06-04 | The dispensing device of wireless charging, wireless charging system and wireless charging control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103457362A CN103457362A (en) | 2013-12-18 |
| CN103457362B true CN103457362B (en) | 2016-02-03 |
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| CN201210180427.5A Active CN103457362B (en) | 2012-06-04 | 2012-06-04 | The dispensing device of wireless charging, wireless charging system and wireless charging control method |
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