CN107046319A - Wireless charging control method and wireless charging system - Google Patents

Wireless charging control method and wireless charging system Download PDF

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Publication number
CN107046319A
CN107046319A CN201710474718.8A CN201710474718A CN107046319A CN 107046319 A CN107046319 A CN 107046319A CN 201710474718 A CN201710474718 A CN 201710474718A CN 107046319 A CN107046319 A CN 107046319A
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CN
China
Prior art keywords
dutycycle
circuit
current
inverter circuit
switching inverter
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CN201710474718.8A
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Chinese (zh)
Inventor
钱强
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北京师范大学珠海分校
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Priority to CN201710474718.8A priority Critical patent/CN107046319A/en
Publication of CN107046319A publication Critical patent/CN107046319A/en

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/022Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters characterised by the type of converter
    • H02J7/025Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters characterised by the type of converter using non-contact coupling, e.g. inductive, capacitive

Abstract

The present invention relates to a kind of wireless charging control method and wireless charging system, wireless charging control method includes:Obtain the position relationship between the first resonance circuit of wireless transmission side and the second resonance circuit of wireless receiving side;If position relationship meets preparatory condition, then increase default step-length on the basis of default basic dutycycle and obtain modulated dutycycle, send the corresponding pwm signal of modulated dutycycle to the switching inverter circuit of wireless transmission side and gather the corresponding input current of switching inverter circuit;If input current is less than default rated current or modulated dutycycle is less than default dutycycle, then circulation performs the modulated dutycycle after the default step-length of the increase on modulated dutycycle is updated and sends correspondence pwm signal, when input current reaches default rated current or modulated dutycycle reaches default dutycycle, the dutycycle for keeping pwm signal is modulated dutycycle.In this way, transimission power is high.

Description

Wireless charging control method and wireless charging system
Technical field
The present invention relates to charging technique field, more particularly to a kind of wireless charging control method and wireless charging system.
Background technology
Wireless charging is the electric energy transmission that non-electric wire connection is realized by way of electromagnetic energy is transmitted, compared to wired charging For, it is to avoid a series of problem that power cable is excessively frequently brought using exposing with conductor, reduce electric shock Danger, improves the convenience of durability, security and electric energy transmission.
Wireless charging system includes emitting side and receiving side, and direct current is converted to friendship by general emitting side using inverter circuit Electromagnetic energy is converted electrical energy into by resonance circuit after stream electricity, the resonance circuit that receiving side receives emitting side by resonance circuit is sent out The electromagnetic energy penetrated is converted to alternating current, and is used by rectification output direct current for load.Generally, in order to protect in charging process Current Voltage will not be excessive and damages equipment, and traditional wireless charging system transimission power is smaller, although realize wireless charging Process, but transimission power is low.
The content of the invention
Based on this, it is necessary to for traditional wireless charging system transimission power it is low the problem of improve and transmit there is provided one kind The wireless charging control method and wireless charging system of power.
A kind of wireless charging control method, including:
Obtain the position relationship between the first resonance circuit of wireless transmission side and the second resonance circuit of wireless receiving side;
If the position relationship meets preparatory condition, increase default step-length on the basis of default basic dutycycle and obtain To modulated dutycycle;
The corresponding pwm signal of the modulated dutycycle is sent to the switching inverter circuit of the wireless transmission side, and is gathered The corresponding input current of the switching inverter circuit;
It is less than default rated current in the input current of the switching inverter circuit and the modulated dutycycle is less than default During dutycycle, increase the modulated dutycycle after the default step-length is updated on the basis of the modulated dutycycle, and return The corresponding pwm signal of the modulated dutycycle that sends is returned to the switching inverter circuit of the wireless transmission side, and gathers institute The step of stating switching inverter circuit corresponding input current;
Reach that the default rated current or the modulated dutycycle reach in the input current of the switching inverter circuit During the default dutycycle, it is the modulated dutycycle to keep sending to the dutycycle of the pwm signal of the switching inverter circuit.
Above-mentioned wireless charging control method, by obtain wireless transmission side the first resonance circuit and wireless receiving side Position relationship between two resonance circuits, if position relationship meets preparatory condition, on the basis of default basic dutycycle The default step-length of increase obtains modulated dutycycle, sends the corresponding pwm signal of modulated dutycycle to switching inverter circuit, makes wireless hair The transmitted power increase of side is penetrated, while gathering the corresponding input current of switching inverter circuit;In the input electricity of switching inverter circuit Stream is less than default rated current and when modulated dutycycle is less than default dutycycle, increases default step on the basis of modulated dutycycle The modulated dutycycle after being updated is grown, repeats to send the corresponding pwm signal of modulated dutycycle to switching inverter circuit and gathers The input current of corresponding switching inverter circuit;Default rated current is reached in the input current of switching inverter circuit or modulated is accounted for It is empty that than reaching during default dutycycle, it is modulated dutycycle to keep sending to the dutycycle of the pwm signal of switching inverter circuit, so that Keep the transmitted power of wireless transmission side constant.In this way, can be when position relationship meets preparatory condition by the defeated of wireless transmission side Electrical power is tuned up to optimum state, and transimission power is high.
A kind of wireless charging system, including wireless transmission side and wireless receiving side, it is defeated that the wireless transmission side includes direct current Go out device, switching inverter circuit, the first resonance circuit, emitting side control device, the switching inverter circuit connects the direct current Output device, first resonance circuit and the emitting side control device, the wireless receiving side include the second resonance circuit With reception rectification circuit, the reception rectification circuit connects second resonance circuit and load;
The switching inverter circuit receives the direct current of the DC output devices output and is converted to exchange electricity output extremely The alternating current of reception is converted to electromagnetic energy and launched by first resonance circuit, first resonance circuit, and described second is humorous Electromagnetic energy described in circuit wireless receiving of shaking simultaneously is converted to exchange electricity output to the reception rectification circuit, the reception rectification circuit The alternating current of reception is converted into direct current electricity output to the load;
The emitting side control device is used to realize above-mentioned wireless charging control method.
Above-mentioned wireless charging control system, wireless transmission side carries out the transmitting of electromagnetic energy, and wireless receiving side joint receives electromagnetic energy And powering load, by setting emitting side control device to realize above-mentioned wireless charging control method in wireless transmission side, similarly The transmitted power of wireless transmission side can be tuned up to optimum state, the energy transimission power of wireless charging is high.
Brief description of the drawings
Fig. 1 is the flow chart of wireless charging control method in an embodiment;
Fig. 2 is the flow chart of wireless charging control method in another embodiment;
Fig. 3 is the structure chart of wireless charging system in an embodiment;
Fig. 4 is the structure chart of wireless charging system in another embodiment.
Embodiment
With reference to Fig. 1, the wireless charging control method in an embodiment can be applied to control device to wireless charging system Charge control is realized in wireless transmission side, comprises the following steps.
S120:Obtain the position between the first resonance circuit of wireless transmission side and the second resonance circuit of wireless receiving side Relation.
Second resonance circuit of wireless receiving side is used for the electromagnetic energy for the first resonance circuit transmitting for receiving wireless transmission side And be converted to alternating current.Position relationship between first resonance circuit and the second resonance circuit influences wireless hair to a certain extent The energy transmission penetrated between side and wireless receiving side, such as, the second resonance circuit just transmit effect to the energy of the first resonance circuit Fruit is better than the energy laser propagation effect that the second resonance circuit offsets the first resonance circuit.Position relationship can be by execution wireless charging The control device of the emitting side of control method is obtained by sensor or got by other equipment and sent out after position relationship Give control device;Such as, an equipment can be set to obtain position relationship and wireless hair is wirelessly sent in wireless receiving side Penetrate the control device of side.Specifically, position relationship can include distance, can also be including angle etc..
S130:If position relationship meets preparatory condition, increase default step-length on the basis of default basic dutycycle Obtain modulated dutycycle.
Preparatory condition is the condition that position relationship needs to meet;The number specifically set is actually needed according to default step-length Value;Basic dutycycle can be prestored according to actual needs.Use whether preparatory condition can meet requirement with test position relation, If position relationship meets preparatory condition, then it represents that position relationship, which is met, to be required, now, by increasing pre- on basic dutycycle If step-length obtains modulated dutycycle.
S140:The corresponding pwm signal of modulated dutycycle is sent to the switching inverter circuit of wireless transmission side, and gathers switch The corresponding input current of inverter circuit.
The switching inverter circuit of wireless transmission side is used to be converted in direct current to export after alternating current to wireless transmission side First resonance circuit, launches so that the first resonance circuit is converted electrical energy into after electromagnetic energy.It is inverse to switching by sending pwm signal Become circuit, the pulsewidth of controllable switch inverter circuit output, so as to control the transmitted power of wireless transmission side.Send inverse to switching The dutycycle for becoming PWM (Pulse Width Modulation pulsewidth modulations) signal of circuit is bigger, the transmission of electricity of wireless transmission side Power is bigger.
By the way that the modulated dutycycle for increasing dutycycle is sent to switching inverter circuit, so as to increase transmitted power.Wherein, The corresponding input current of switching inverter circuit is gathered, refers to sending collection switch after the corresponding pwm signal of modulated dutycycle inverse Become the input current of circuit, i.e. often send once the corresponding pwm signal of modulated dutycycle to switching inverter circuit, correspondence collection The input current of switching inverter circuit.
S150:It is less than default rated current in the input current of switching inverter circuit and modulated dutycycle is less than default duty Than when, increase the modulated dutycycle after default step-length is updated, and return to step S140 on the basis of the modulated dutycycle.
Wherein, preset dutycycle and be more than basic dutycycle.Specifically, in the present embodiment, default dutycycle can be 0.5.
S160:Reach that default rated current or modulated dutycycle reach default duty in the input current of switching inverter circuit Than when, keep send to switching inverter circuit pwm signal dutycycle be modulated dutycycle.
Analyzed by the input current to modulated dutycycle and the switching inverter circuit of collection, with switching inverter circuit Input current reach that default rated current or modulated dutycycle reach default dutycycle as the cut-off condition of circulation, circulation is held Row sends the operation of the corresponding pwm signal of modulated dutycycle after increase, and make the transmitted power of wireless transmission side increases successively;If Reach cut-off condition, then it represents that transmitted power has reached the transmitted power of current maximum, the dutycycle for now keeping pwm signal is Modulated dutycycle, so as to keep current transmitted power constant.
Above-mentioned wireless charging control method, by obtain wireless transmission side the first resonance circuit and wireless receiving side Position relationship between two resonance circuits, if position relationship meets preparatory condition, on the basis of default basic dutycycle The default step-length of increase obtains modulated dutycycle, sends the corresponding pwm signal of modulated dutycycle to switching inverter circuit, makes wireless hair The transmitted power increase of side is penetrated, while gathering the corresponding input current of switching inverter circuit;In the input electricity of switching inverter circuit Stream is less than default rated current and when modulated dutycycle is less than default dutycycle, increases default step on the basis of modulated dutycycle The modulated dutycycle after being updated is grown, repeats to send the corresponding pwm signal of modulated dutycycle to switching inverter circuit and gathers The input current of corresponding switching inverter circuit;Default rated current is reached in the input current of switching inverter circuit or modulated is accounted for It is empty that than reaching during default dutycycle, it is modulated dutycycle to keep sending to the dutycycle of the pwm signal of switching inverter circuit, so that Keep the transmitted power of wireless transmission side constant.In this way, can be when position relationship meets preparatory condition by the defeated of wireless transmission side Electrical power is tuned up to optimum state, and transimission power is high.
In one embodiment, step S110 is also included before step S120.
S110:The corresponding pwm signal of basic dutycycle is sent to switching inverter circuit.
Basic dutycycle corresponds to initial send to the dutycycle of the pwm signal of switching inverter circuit.Specifically, step S110 is performed after power-up, i.e., the corresponding pwm signal of basic dutycycle is sent after upper electricity to switching inverter circuit.Basic duty Than may be configured as a less value, so that wireless transmission side starts to be transmitted with less transmitted power, charging safety Property it is high.
In one embodiment, after step S120, in addition to position regulation prompting step:If position relationship is unsatisfactory for presetting Condition, then outgoing position adjustment information.
Position adjustment information, which is used for prompting, to be needed to carry out position adjustment to the first resonance circuit or the second resonance circuit.Pass through Outgoing position adjustment information, it is easy-to-use to notify user to carry out position adjustment in time.Specifically, can adjust position Whole information is sent directly to display and is shown or send position adjustment information to the equipment of wireless transmission side Afterwards, shown by the equipment control display of wireless transmission side.
In one embodiment, position relationship includes the distance between the first resonance circuit and the second resonance circuit, presets bar Part is that distance is less than or equal to pre-determined distance.
The distance between first resonance circuit and the second resonance circuit can be obtained by using range sensor detection, than Such as infrared sensor or ultrasonic sensor.Specifically, the first resonance circuit includes transmitting coil, and the second resonance circuit includes connecing Take-up circle, the distance between the first resonance circuit and the second resonance circuit can specifically refer between transmitting coil and receiving coil Distance.It is appreciated that in other embodiments, position relationship can also include other, such as transmitting coil and receiving coil Between angle;Accordingly, preparatory condition can be that distance is less than or equal to pre-determined distance and angle is less than or equal to preset angle Degree.
In one embodiment, with reference to Fig. 2, after S140, in addition to step S141 and step S142.
S141:Gather the corresponding input voltage of switching inverter circuit, and the corresponding output electricity in wireless receiving wireless receiving side Stream and output voltage.
The corresponding output current in wireless receiving side and output voltage, refer to sending the corresponding PWM letters of modulated dutycycle respectively Number to after switching inverter circuit, wireless receiving side is exported to the electric current of load and output to the voltage of load.By using wireless Receive, it is to avoid the use of electric wire, communication is convenient and safe to use.
S142:It is more than in the input current of switching inverter circuit more than the input voltage of predetermined current, switch inversion side pre- If voltage, the output current of wireless receiving side are more than the voltage of predetermined current or wireless receiving side more than predeterminated voltage, output For turning off the pwm signal of switching inverter circuit to switching inverter circuit.
Predetermined current and predeterminated voltage correspond to the safety that will not cause to damage to the equipment in wireless charging system respectively Current value and safe voltage value, can specifically be set according to actual conditions.If switching inverter circuit is turned off, the first resonance circuit stops Only launch electromagnetic energy, stop energy transmission between wireless transmission side and wireless receiving side.
By step S141 and step S142, to switching inverter circuit after pwm signal to switching inverter circuit is sent The output current and output voltage of input current and input voltage and wireless receiving side are analyzed, if four item datas of analysis In any one of have and to be more than corresponding predetermined current/predeterminated voltage, then controlling switch inverter circuit is turned off, and can prevent curtage Further increase and damage equipment or failure, so as to improve the safety and reliability of wireless charging.
Specifically, in the present embodiment, step S141 is performed before step S150 and step S160, and step S142 includes step Rapid S1421 and step S1422.
S1421:Detect whether that the input current of switching inverter circuit is more than predetermined current, the input of switching inverter circuit Voltage is more than predeterminated voltage, the output current of wireless receiving side is more than predetermined current or the voltage of wireless receiving side is more than default electricity Pressure.If so, then performing step S1422;If it is not, then performing step S150 or step S160.
S1422:Export for turning off the pwm signal of switching inverter circuit to switching inverter circuit.
By first carrying out, step S141 and step S142 carries out electric current and whether voltage exceeds corresponding predetermined current and pre- If the analysis of voltage, safety guarantee efficiency high.
In one embodiment, in step S150, it is less than default rated current and in the input current of switching inverter circuit When adjusting the dutycycle to be less than default dutycycle, before also detecting once transmission pwm signal to switching inverter circuit time interval, if when Between interval reach preset duration, then increase the modulated dutycycle after default step-length is updated on the basis of the modulated dutycycle, And return to step S140.That is, pwm signal is sent according to preset duration interval.
The input current of switching inverter circuit is gathered after transmission pwm signal each time, so as to the input according to collection Electric current and current modulated duty cycle analysis;Pwm signal is sent to switching inverter circuit by being spaced, for the input electricity to collection Stream and current modulated dutycycle perform an analysis offer buffer time, so as to improve the reliability for sending pwm signal next time.
In one embodiment, the frequency of the corresponding pwm signal of basic dutycycle and the corresponding pwm signal of modulated dutycycle is equal For default base frequency.That is, during transmitted power of the dutycycle to increase wireless transmission side is increased, pwm signal Frequency immobilizes.
Specifically, with continued reference to Fig. 2, after step S160, in addition to step S161 to step S165.
S161:Collection sends the input electricity of switching inverter circuit after modulated dutycycle and the corresponding pwm signal of base frequency Stream and input voltage, and the corresponding output current in wireless receiving wireless receiving side and output voltage.
The corresponding output current in wireless receiving side and output voltage, refer to sending the corresponding PWM letters of modulated dutycycle respectively Number to after switching inverter circuit, wireless receiving side is exported to the electric current of load and output to the voltage of load.
S162:According to the input current of the switching inverter circuit currently gathered the, input voltage of switching inverter circuit, wireless The corresponding output voltage of the corresponding output current of receiving side and wireless receiving side obtains current energy transmission efficiency.
Specifically, step S162 includes:Calculate the corresponding output current in wireless receiving side and wireless receiving side is corresponding defeated The product for going out voltage obtains the first value, calculates multiplying for the input current of switching inverter circuit and the input voltage of switching inverter circuit Product obtains second value, and calculate the first value divided by second value is worth to energy transmission efficiency.
S163:If current energy transmission efficiency is more than previous energy transmission efficiency, in modulated dutycycle correspondence Increase predeterminated frequency on the frequency of pwm signal and obtain modulated frequency.
Previous energy transmission efficiency once sends the input electricity of the switching inverter circuit gathered after pwm signal before referring to Stream, input voltage, the corresponding output current in wireless receiving side and the corresponding energy transmission efficiency of output voltage.If current energy Efficiency of transmission is more than previous energy transmission efficiency, and it is in increase trend to represent efficiency, now increases PWM letters according to predeterminated frequency Number frequency.
S164:If current energy transmission efficiency is less than previous energy transmission efficiency, in modulated dutycycle correspondence Reduce predeterminated frequency on the frequency of pwm signal and obtain modulated frequency.
If current energy transmission efficiency is less than previous energy transmission efficiency, it is in reduction trend to represent efficiency, now Reduce the frequency of pwm signal according to predeterminated frequency.
Specifically, after step S161, before step S163, in addition to detecting step:Detect that the switch currently gathered is inverse Whether become input current, input voltage, the corresponding output current in wireless receiving side and the output voltage of circuit into holding pwm signal Dutycycle be modulated dutycycle after first time collect;If so, then in the frequency of modulated dutycycle correspondence pwm signal On increase predeterminated frequency obtain modulated frequency;If it is not, then performing step S163 or step S164.Wherein, detecting step can be with Perform, can also be performed before step S162 after step S162.
S165:Modulated frequency and the corresponding pwm signal of modulated dutycycle are sent to switching inverter circuit, and return to step S161。
Send to the frequency shift of the pwm signal of switching inverter circuit, then accordingly energy transmission efficiency changes.Step After S163 and step S164 perform step S165, by dutycycle it is constant, adjustment frequency after pwm signal send to switch inversion Circuit, so as to change energy transmission efficiency.
Step S161 to step S165 to the adjacent energy transmission efficiency obtained twice by being compared, according to comparing knot Fruit adjusts the frequency of pwm signal, and energy transmission efficiency increase then increases the frequency of pwm signal, and it is then right that energy transmission efficiency reduces The frequency of pwm signal should be reduced, so adjustable energy transmission efficiency is in optimum state.
Specifically, after step S162, before step S165, step can also be included:If current energy transmission efficiency Equal to previous energy transmission efficiency, then keep the frequency of pwm signal constant.
In one embodiment, after step S161, before step S165, in addition to protection step:In switching inverter circuit Input current be more than predetermined current, switch inversion side input voltage be more than predeterminated voltage, the output current of wireless receiving side When voltage more than predetermined current or wireless receiving side is more than predeterminated voltage, exports the PWM for turning off switching inverter circuit and believe Number to switching inverter circuit.
Specifically, predeterminated voltage and predetermined current are equal with the predeterminated voltage and predetermined current in step S142.By The input current and input voltage and wireless receiving after pwm signal to switching inverter circuit to switching inverter circuit are sent every time The output current and output voltage of side are analyzed, if any one of have in four item datas of analysis be more than corresponding predetermined current/ Predeterminated voltage, then controlling switch inverter circuit shut-off, can prevent curtage from further increasing and damage equipment or event occur Barrier, so as to improve the safety and reliability of wireless charging.Protect step can be in step S162, step S163 and step S164 Either step before or after, in the present embodiment, protection step performed before step S162.
With reference to Fig. 3, a kind of wireless charging system, including wireless transmission side and wireless receiving side, wireless transmission side includes straight Stream output device 210, switching inverter circuit 220, the first resonance circuit 230, emitting side control device 240, switching inverter circuit 220 connection DC output devices 210, the first resonance circuit 230 and emitting side control device 240, wireless receiving side includes second Resonance circuit 310 and reception rectification circuit 320, receive second resonance circuit of the connection of rectification circuit 320 310 and load 10.
Switching inverter circuit 220 receives the direct current that DC output devices 210 export and is converted to exchange electricity output to the The alternating current of reception is converted to electromagnetic energy and launched by one resonance circuit 230, the first resonance circuit 230;Second resonance circuit 310 Wireless receiving electromagnetic energy is simultaneously converted to exchange electricity output to rectification circuit 320 is received, and receives rectification circuit 320 by the exchange of reception Electricity is converted to direct current electricity output to load 10.Emitting side control device 240 is used to realize above-mentioned wireless charging control method.
Above-mentioned wireless charging control system, wireless transmission side carries out the transmitting of electromagnetic energy, and wireless receiving side joint receives electromagnetic energy And powered to load 10, by setting emitting side control device 240 to realize above-mentioned wireless charging control method in wireless transmission side, The transmitted power of wireless transmission side can be similarly tuned up to optimum state, the energy work rate of wireless charging is high.
Wherein, emitting side control device 240 realizes for example above-mentioned wireless charging of the specific method of above-mentioned wireless charging control method Described in electric control method, it will not be described here.
In one embodiment, with reference to Fig. 4, DC output devices 210 include transmitting rectification circuit 211 and filter circuit 212, The connection of filter circuit 212 transmitting rectification circuit 211 and switching inverter circuit 220.
By being filtered processing filtering clutter before input dc power to switching inverter circuit 220, quality is good.Specifically Ground, transmitting rectification circuit 211 is used to access civil power.
In one embodiment, with continued reference to Fig. 4, emitting side control device 240 includes transmitting side controller 241 and emitting side Sample circuit 242, the connection DC output devices 210 of emitting side sample circuit 242 and transmitting side controller 241 are straight for gathering Stream output device 210, which is exported, to be obtained the input current of switching inverter circuit 220 to the electric current of switching inverter circuit 220 and sends extremely Launch side controller 241;Launch the connecting valve inverter circuit 220 of side controller 241, transmitting side controller 241 is used to realize The step of stating wireless charging control method.
Wireless charging control is realized by using transmitting side controller 241, is carried out using emitting side sample circuit 242 to straight Stream output device 210 carries out current sample, simple in construction and be easily achieved.
In one embodiment, emitting side sample circuit 242 be additionally operable to collection DC output devices 210 export to switch inversion The voltage of circuit 220 obtains the input voltage of switching inverter circuit 220.
Specifically, in the present embodiment, the connection filter circuit 212 of emitting side sample circuit 242, for gathering filter circuit The electric current and voltage of 212 outputs.It is appreciated that in other embodiments, emitting side sample circuit 242 can be inverse with connecting valve Become the input current that circuit 220 directly gathers switching inverter circuit 220.
In one embodiment, with continued reference to Fig. 4, above-mentioned wireless charging system also includes receiving side control device 330, receives Side control device 330 includes receiving side controller 331 and receiving side sample circuit 332, receives the connection receiving side of side controller 331 Sample circuit 332 and with the radio communication of emitting side control device 240;Receiving side sample circuit 332, which is used to gather, receives rectified current The output of road 320 to output current and output voltage of the electric current and voltage for loading 10 as wireless receiving side, and transmission is extremely received Side controller 331, receives side controller 331 and the output current and voltage of wireless receiving side is wirelessly transmitted into emitting side control dress Put 240.
By setting receiving side control device 330 in receiving side, wireless receiving side is gathered by receiving side sample circuit 332 Output current and output voltage, transmitting is wirelessly sent to by reception side controller 331 by the output voltage and output current of collection Side control device 240, on the one hand, be easy to emitting side control device 240 according to the output current and output voltage of wireless receiving side The acquisition of energy transimission power is carried out to adjust the frequency of pwm signal, and for judge wireless receiving side output current and Whether output voltage is more than corresponding predetermined current and predeterminated voltage to carry out electric current and safety guarantee;On the other hand, by connecing Receive the radio communication of side controller 331 and emitting side control device 240, it is to avoid the use of electric wire, communication is convenient and use peace Quan Xinggao.
Specifically, side controller 331 and the transmitting radio communication of side controller 241 are received.Receiving side sample circuit 332 can be with Connection receives rectification circuit 320 and receives the output of rectification circuit 320 to the electric current and voltage of load 10 to gather, and can also directly connect Load 10 is connect to gather the input current and input voltage of load 10 as the output current and output voltage of wireless receiving side.This In embodiment, with reference to Fig. 4, the connection of receiving side sample circuit 332 load 10.
In one embodiment, above-mentioned wireless charging system also includes range sensor (not shown), range sensor measurement The distance between first resonance circuit 230 and the second resonance circuit 310 are simultaneously sent to emitting side control device 240.
Range sensor can be arranged at the first resonance circuit 230, can also be arranged at the second resonance circuit 310.Pass through The distance between first resonance circuit 230 and the second resonance circuit 310 are measured using range sensor, it is convenient and swift.Specifically, Range sensor can be infrared sensor, can also be ultrasonic sensor.
Range sensor can be directly connected to emitting side control device 240, directly send the distance of measurement to emitting side Control device 240;Range sensor can also connect reception side controller 331, and the distance of measurement is sent to receiving side control Device 331, will be apart from transmission to emitting side control device 240 by reception side controller 331.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.

Claims (10)

1. a kind of wireless charging control method, it is characterised in that including:
Obtain the position relationship between the first resonance circuit of wireless transmission side and the second resonance circuit of wireless receiving side;
If the position relationship meets preparatory condition, increase default step-length on the basis of default basic dutycycle and obtain Adjust dutycycle;
The corresponding pwm signal of the modulated dutycycle is sent to the switching inverter circuit of the wireless transmission side, and gathers described The corresponding input current of switching inverter circuit;
It is less than default rated current in the input current of the switching inverter circuit and the modulated dutycycle is less than default duty Than when, increase the modulated dutycycle after the default step-length is updated on the basis of the modulated dutycycle, and return to institute State and send the corresponding pwm signal of the modulated dutycycle to the switching inverter circuit of the wireless transmission side, and opened described in collection The step of closing inverter circuit corresponding input current;
Reach that the default rated current or the modulated dutycycle reach in the input current of the switching inverter circuit described During default dutycycle, it is the modulated dutycycle to keep sending to the dutycycle of the pwm signal of the switching inverter circuit.
2. wireless charging control method according to claim 1, it is characterised in that the first of the acquisition wireless transmission side Before position relationship between resonance circuit and the second resonance circuit of wireless receiving side, in addition to:
The corresponding pwm signal of the basic dutycycle is sent to the switching inverter circuit;And/or
Position relationship between first resonance circuit for obtaining wireless transmission side and the second resonance circuit of wireless receiving side Afterwards, in addition to:
If the position relationship is unsatisfactory for preparatory condition, outgoing position adjustment information.
3. wireless charging control method according to claim 1, it is characterised in that the position relationship includes described first The distance between resonance circuit and second resonance circuit, the preparatory condition be the distance be less than or equal to it is default away from From.
4. wireless charging control method according to claim 1, it is characterised in that the transmission modulated dutycycle pair The pwm signal answered to the wireless transmission side switching inverter circuit, and gather the switching inverter circuit it is corresponding input electricity After stream, in addition to:
Gather the corresponding input voltage of the switching inverter circuit, and the corresponding output current in wireless receiving side described in wireless receiving And output voltage;
It is more than in the input current of the switching inverter circuit more than the input voltage of predetermined current, the switch inversion side default Voltage, the output current of the wireless receiving side are more than the voltage of the predetermined current or the wireless receiving side more than described pre- If during voltage, exporting for turning off the pwm signal of the switching inverter circuit to the switching inverter circuit.
5. the wireless charging control method according to claim any one of 1-4, it is characterised in that the basic dutycycle pair The pwm signal and the frequency of the corresponding pwm signal of the modulated dutycycle answered are default base frequency;
The input current in the switching inverter circuit reaches that the default rated current or the modulated dutycycle reach During the default dutycycle, it is the modulated dutycycle to keep sending to the dutycycle of the pwm signal of the switching inverter circuit Afterwards, in addition to:
Collection sends the input of the switching inverter circuit after the modulated dutycycle and the corresponding pwm signal of the base frequency Electric current and input voltage, and the corresponding output current in wireless receiving side and output voltage described in wireless receiving;
It is corresponding defeated according to the input current of the switching inverter circuit currently gathered, input voltage, the wireless receiving side Go out electric current and output voltage obtains current energy transmission efficiency;
If current energy transmission efficiency is more than previous energy transmission efficiency, in the modulated dutycycle correspondence PWM letters Number frequency on increase predeterminated frequency obtain modulated frequency;
If current energy transmission efficiency is less than previous energy transmission efficiency, in the modulated dutycycle correspondence PWM letters Number frequency on reduce the predeterminated frequency and obtain modulated frequency;
The modulated frequency and the corresponding pwm signal of the modulated dutycycle are sent to the switching inverter circuit, and returns to institute State the input electricity that collection sends the switching inverter circuit after the modulated dutycycle and the corresponding pwm signal of the base frequency Stream and input voltage, and the step of corresponding output current in wireless receiving side described in wireless receiving and output voltage.
6. a kind of wireless charging system, it is characterised in that including wireless transmission side and wireless receiving side, the wireless transmission side bag Include DC output devices, switching inverter circuit, the first resonance circuit, emitting side control device, the switching inverter circuit connection The DC output devices, first resonance circuit and the emitting side control device, the wireless receiving side include second Resonance circuit and reception rectification circuit, the reception rectification circuit connect second resonance circuit and load;
The switching inverter circuit receives the direct current of the DC output devices output and is converted to exchange electricity output to described The alternating current of reception is converted to electromagnetic energy and launched by the first resonance circuit, first resonance circuit, the second resonance electricity Electromagnetic energy described in the wireless receiving of road is simultaneously converted to exchange electricity output to the reception rectification circuit, and the reception rectification circuit will connect The alternating current of receipts is converted to direct current electricity output to the load;
The emitting side control device is used to realize the wireless charging control method as described in claim any one of 1-6.
7. wireless charging system according to claim 6, it is characterised in that the emitting side control device includes emitting side Controller and emitting side sample circuit, the emitting side sample circuit connect the DC output devices and emitting side control Device, exports to the electric current of the switching inverter circuit for gathering the DC output devices and obtains the switching inverter circuit Input current is simultaneously sent to the transmitting side controller, and the transmitting side controller connects the switching inverter circuit.
8. wireless charging system according to claim 6, it is characterised in that described to connect also including receiving side control device Receiving side control device includes receiving side sample circuit and receives side controller, and the reception side controller connects the receiving side and adopted Sample circuit and with the emitting side control device radio communication, the receiving side sample circuit be used for gather the reception rectified current Road exports to the electric current of the load and voltage the output current and output voltage as the wireless receiving side, and sends to institute Reception side controller is stated, the output current and the voltage of the wireless receiving side are wirelessly transmitted to by the reception side controller The emitting side control device.
9. wireless charging system according to claim 6, it is characterised in that also including range sensor, the distance is passed Sensor measures the distance between first resonance circuit and described second resonance circuit and sent to the emitting side and controls to fill Put.
10. wireless charging system according to claim 6, it is characterised in that the DC output devices include launching whole Current circuit and filter circuit, the filter circuit connection transmitting rectification circuit and the switching inverter circuit.
CN201710474718.8A 2017-06-21 2017-06-21 Wireless charging control method and wireless charging system CN107046319A (en)

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Application publication date: 20170815