CN108539874A - Wireless charging adaptive impedance matching system and method for - Google Patents
Wireless charging adaptive impedance matching system and method for Download PDFInfo
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- CN108539874A CN108539874A CN201711372993.5A CN201711372993A CN108539874A CN 108539874 A CN108539874 A CN 108539874A CN 201711372993 A CN201711372993 A CN 201711372993A CN 108539874 A CN108539874 A CN 108539874A
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- impedance matching
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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
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of wireless charging Adaptive impedance matching System and method for, which includes two transmitting terminals, a receiving terminal and a MCU；Above-mentioned two transmitting terminal includes power amplifier, impedance matching network, transmitting terminal LC resonance coil and detection module；Above-mentioned reception end module includes receiving terminal LC resonance coil, full bridge rectifier and DC DC Voltage stabilizing modules.Compared to existing technologies, the present invention detects the mutual inductance between the input impedance and transmitting terminal and receiving terminal of transmitting terminal using above-mentioned detection module, then the value of each component in impedance matching network type and impedance matching network is determined according to the mutual inductance between the input impedance of transmitting terminal and transmitting terminal and receiving terminal, then corresponding impedance matching network is built, thereby may be ensured that power amplifier being capable of normal output power.
Description
Technical field
The present invention relates to wireless charging technical field more particularly to a kind of wireless charging Adaptive impedance matching system and sides
Method.
Background technology
It is also higher and higher to the cry of wireless charging in the market with increasing for mobile electronic device.Wireless charging can
User is set to break away from the dependence to charging wire, realization freely charges, considerably increases user experience and product is answered whenever and wherever possible
Use convenience.Currently, the wireless charging technology in society can mainly be divided into three kinds：Induction, magnetic resonance type, microwave
Radiant type.
Most of existing magnetic resonance type wireless charging system is that single-shot list receives formula magnetic resonance wireless charging system, that is, is applied
Receiving terminal LC resonance coil of one transmitting terminal LC resonance coil pair carries out wireless power transmission by way of magnetic resonance.But
It is sometimes to be needed due to special requirement with multiple transmitting terminal LC resonance coils, the i.e. wireless charging system of multiple illuminators and single receiver formula.Nothing
By being that single-shot list receives formula magnetic resonance wireless charging system or multiple illuminators and single receiver formula wireless charging system, if carrying out radio energy
During transmission, receiving terminal is in a mobile state, then can lead to the impedance variations of transmitting terminal LC resonance coil very
Greatly, make transmitting terminal LC resonance coil input impedance and power amplifier equivalent internal resistance mismatch, cause power amplifier without
Method normal output power so that entire wireless charging system is unable to operate normally.
Invention content
The main purpose of the present invention is to provide a kind of wireless charging Adaptive impedance matching System and method fors, it is intended to solve
In the prior art when receiving terminal is in mobile status, then the impedance variations of transmitting terminal LC resonance coil can be caused very big, make hair
The equivalent internal resistance of the input impedance and power amplifier of penetrating end LC resonance coil mismatches, and then causes power amplifier can not be just
The technical issues of normal output power.
To achieve the above object, first aspect present invention provides a kind of wireless charging Adaptive impedance matching system, this is
System includes the first transmitting terminal, the second transmitting terminal, receiving terminal and micro-control unit MCU；
First transmitting terminal includes the first power amplifier, the first impedance matching network, the first transmitting terminal LC resonance line
Circle and first detection module；The output end of first power amplifier and the input terminal of first impedance matching network connect
It connects, the output end of first impedance matching network is connect with the input terminal of the first detection module, the first detection mould
The output end of block is connect with the input terminal of the first transmitting terminal LC resonance coil, the signal end of convert of the first detection module
It is connect with the input terminal of the signal input part of the MCU and first power amplifier；The digital signal port of the MCU with
The control terminal of first impedance matching network connects；
Second transmitting terminal includes the second power amplifier, the second impedance matching network, the second transmitting terminal LC resonance line
Circle and the second detection module；The output end of second power amplifier and the input terminal of second impedance matching network connect
It connects, the output end of second impedance matching network is connect with the input terminal of second detection module, the second detection mould
The output end of block is connect with the input terminal of the second transmitting terminal LC resonance coil, the signal end of convert of second detection module
It is connect respectively with the input terminal of the signal input part of the MCU and second power amplifier；The digital signal end of the MCU
Mouth is connect with the control terminal of second impedance matching network；
The receiving terminal includes receiving terminal LC resonance coil, full bridge rectifier, DC-DC regulator circuits, the receiving terminal
LC resonance coil, the full bridge rectifier and the DC-DC regulator circuits are sequentially connected, and the receiving terminal LC resonance coil is used
In the alternating electromagnetic field for incuding the first transmitting terminal LC resonance coil and the generation of the second transmitting terminal LC resonance coil.
To achieve the above object, second aspect of the present invention provides a kind of wireless charging Adaptive impedance matching method, the party
Method is applied to the wireless charging Adaptive impedance matching system that first aspect present invention provides, and this method includes：
Every preset time interval, the input impedance Z of the first transmitting terminal LC resonance coil is measuredAAnd first transmitting
Hold the mutual inductance M between LC resonance coil and receiving terminal LC resonance coil1；
Measure the input impedance Z of the second transmitting terminal LC resonance coilBAnd second transmitting terminal LC resonance coil and receiving terminal
Mutual inductance M between LC resonance coil2；
According to the input impedance ZAWith input impedance ZBSelect the first impedance matching network and the second impedance matching network
Network type, and according to the network type of selection, the mutual inductance M1And mutual inductance M2Calculate separately first impedance
The value of distribution network and each component in the second impedance matching network；
First impedance matching network and the second impedance matching network are built respectively according to the value of each component.
The present invention provides a kind of wireless charging Adaptive impedance matching system, the system include two transmitting terminals, one
Receiving terminal and a micro-control unit MCU；Wherein, transmitting terminal includes power amplifier, impedance matching network, transmitting terminal LC resonance
Coil and detection module；The reception end module includes receiving terminal LC resonance coil, full bridge rectifier, DC-DC Voltage stabilizing modules
And load.In addition, the present invention also provides a kind of method applied to above-mentioned wireless charging Adaptive impedance matching system, compare
For the prior art, input impedance and transmitting terminal and the receiving terminal of transmitting terminal are detected in the present invention using above-mentioned detection module
Between mutual inductance, impedance is then determined according to the mutual inductance between the input impedance of transmitting terminal and transmitting terminal and receiving terminal
The value of each component in matching network type and impedance matching network, then builds corresponding impedance matching network, so as to
When receiving terminal is in mobile status, prevents the impedance variations of transmitting terminal LC resonance coil excessive, avoid transmitting terminal LC resonance
The input impedance of coil and the unmatched problem of the equivalent internal resistance of power amplifier ensure that power amplifier being capable of normal output work
Rate.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those skilled in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the structural schematic diagram of wireless charging Adaptive impedance matching system in first embodiment of the invention；
Fig. 2 is the structural representation of the first impedance matching network or the second impedance matching network in first embodiment of the invention
Figure；
Fig. 3 is the flow diagram of wireless charging Adaptive impedance matching method in second embodiment of the invention；
Fig. 4 is the refinement step flow diagram of step 301 in second embodiment of the invention；
Fig. 5 is the refinement step flow diagram of step 302 in second embodiment of the invention；
Fig. 6 is the structural schematic diagram of topology A type impedance matching networks in the present invention；
Fig. 7 is the structural schematic diagram of topological Type B impedance matching network in the present invention；
Fig. 8 is the structural schematic diagram of topological c-type impedance matching network in the present invention；
Fig. 9 is the structural schematic diagram of topology D type impedance matching networks in the present invention；
Figure 10 is the flow diagram of wireless charging Adaptive impedance matching method in third embodiment of the invention.
Specific implementation mode
In order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below in conjunction with the present invention
Attached drawing in embodiment, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described reality
It is only a part of the embodiment of the present invention to apply example, and not all embodiments.Based on the embodiments of the present invention, people in the art
The every other embodiment that member is obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to Fig. 1, Fig. 1 is the structural representation of wireless charging Adaptive impedance matching system in first embodiment of the invention
Scheme, in the embodiment of the present invention, above-mentioned wireless charging Adaptive impedance matching system includes the first transmitting terminal 10, the second transmitting terminal
20, receiving terminal 30 and MCU；
First transmitting terminal 10 includes the first power amplifier 11, the first impedance matching network 12, the first transmitting terminal LC resonance
Coil 13 and first detection module 14；The input terminal of the output end of first power amplifier 11 and the first impedance matching network 12 connects
Connect, the output end of the first impedance matching network 12 is connect with the input terminal of first detection module 14, first detection module 14 it is defeated
Outlet is connect with the input terminal of the first transmitting terminal LC resonance coil 13, the signal end of convert of first detection module 14 respectively with it is above-mentioned
The input terminal of the signal input part of MCU and the first power amplifier 11 connects；The digital signal port of above-mentioned MCU and the first impedance
The control terminal of matching network 12 connects；
Second transmitting terminal 20 includes the second power amplifier 21, the second impedance matching network 22, the second transmitting terminal LC resonance
Coil 23 and the second detection module 24；The input terminal of the output end of second power amplifier 21 and the second impedance matching network 22 connects
Connect, the output end of the second impedance matching network 22 is connect with the input terminal of the second detection module 24, the second detection module 24 it is defeated
Outlet is connect with the input terminal of the second transmitting terminal LC resonance coil 23, the signal end of convert of the second detection module 24 respectively with it is above-mentioned
The input terminal of the signal input part of MCU and the second power amplifier 21 connects；The digital signal port of above-mentioned MCU and the second impedance
The control terminal of matching network 22 connects；
Receiving terminal 30 includes receiving terminal LC resonance coil 31, full bridge rectifier 32, DC-DC regulator circuits 33；Receiving terminal
LC resonance coil 31, full bridge rectifier 32 and DC-DC regulator circuits 33 are sequentially connected, and receiving terminal LC resonance coil 31 is for feeling
The alternating electromagnetic field for answering the first transmitting terminal LC resonance coil 13 and the second transmitting terminal LC resonance coil 23 to generate.
Wherein, above-mentioned MCU is also known as one chip microcomputer or microcontroller, and in the present embodiment, above-mentioned MCU is for controlling
State the first transmitting terminal 10 and the second transmitting terminal 20.
Wherein, during whole system is run, the first transmitting terminal LC resonance coil 13 and the second transmitting terminal LC are kept
The relative position of resonance coil 23 is constant, and residing ambient enviroment is constant.After remaining modules of system are connected and are powered, the
One power amplifier 11 can export the sinusoidal signal wave of a certain frequency.The sinusoidal signal wave passes through the first impedance matching network
The first transmitting terminal LC resonance coil 13 is acted on after 12 and forms the alternating electromagnetic field with certain frequency in space；It is same with this
When, the second power amplifier 21 can export the sinusoidal signal wave of a certain frequency, which passes through the second impedance
The second transmitting terminal LC resonance coil 23 is acted on after distribution network 22, and forms the alternating electromagnetism with certain frequency in space
；Because the first transmitting terminal LC resonance coil 13 and the second transmitting terminal LC resonance coil 23 have with receiving terminal LC resonance coil 31
Identical resonant frequency, magnetic field caused by them can be overlapped mutually and generate magnetic with receiving terminal LC resonance coil 31 in space
Resonance；The magnetic field sensed can be converted into AC signal by receiving terminal LC resonance coil 31, and whole by the full-bridge of receiving terminal 30
Current circuit 32 and DC-DC regulator circuits 33 are transported in load, to realize the wireless transmission of energy.
Specifically, when carrying out wireless charging, first detection module 14 is used to, every preset time interval, measure first
The input impedance Z of transmitting terminal LC resonance coil 13AAnd first transmitting terminal LC resonance coil 13 and receiving terminal LC resonance coil 31
Between mutual inductance M1；Second detection module 24 is used for every identical time interval measurement the second transmitting terminal LC resonance coil
23 input impedance ZBAnd the second mutual inductance M between transmitting terminal LC resonance coil 23 and receiving terminal LC resonance coil 312；
Then above-mentioned MCU is according to above-mentioned input impedance ZAWith input impedance ZBSelect the first impedance matching network 12 and the second impedance matching
The network type of network 22, and according to the network type of selection, above-mentioned mutual inductance M1And mutual inductance M2Calculate the first impedance
The value of each component in distribution network 12 and the second impedance matching network 22 is finally hindered according to the first impedance matching network 12 and second
The value of each component builds 12 and second impedance matching network 22 of above-mentioned first impedance matching network in anti-matching network 22.
Wireless charging Adaptive impedance matching system provided by the present invention, the system include the first transmitting terminal 10, second
Transmitting terminal 20, receiving terminal 30 and MCU；Wherein, the first transmitting terminal 10 and the second transmitting terminal 20 include power amplifier, impedance
Matching network, transmitting terminal LC resonance coil and detection module utilize above-mentioned detection mould compared to existing technologies in the present invention
Block detect the first transmitting terminal 10 and the second transmitting terminal 20 input impedance and the first transmitting terminal 10, the second transmitting terminal 20 respectively with
Mutual inductance between receiving terminal 30, in type and impedance matching network that impedance matching network is then determined according to result of calculation
Then the value of each component builds corresponding impedance matching network, so as to when receiving terminal is in mobile status, prevent from sending out
Penetrate end LC resonance coil impedance variations it is excessive, avoid transmitting terminal LC resonance coil input impedance and power amplifier etc.
The unmatched problem of internal resistance is imitated, ensures that power amplifier being capable of normal output power.
Further, it is based on first embodiment of the invention, is the first impedance in first embodiment of the invention with reference to Fig. 2, Fig. 2
The structural schematic diagram of matching network or the second impedance matching network；In the embodiment of the present invention, the first impedance matching network 12 and
The structure of two impedance networks 22 is identical, includes the first match circuit 100, the second match circuit 200, inductive circuit 300, hilted broadsword
Commutator K1；
First match circuit 100 is connected with inductive circuit 300, single-pole double-throw switch (SPDT) K1The first non-moving end matched with first
Circuit 100 connects, single-pole double-throw switch (SPDT) K1The second non-moving end connect with inductive circuit 300, single-pole double-throw switch (SPDT) K1Moved end with
Second match circuit 200 connects.
Further, the first match circuit 100 and the second match circuit 200 include several groups it is in parallel Capacity control it is electric
Road, which includes capacitance and capacitance controlled switches, and the capacitance is connected with capacitance controlled switches；
Inductive circuit 300 includes the inductance control circuit of several parallel connections, which includes that inductance is opened with inductance control
It closes, and the inductance is connected with inductance control switch.
The embodiment of the present invention, above-mentioned capacitance controlled switches are electromagnetic relay with inductance control switch.
Specifically, the first impedance matching network and the second impedance matching network use identical impedance matching network, reference
Fig. 2, the first match circuit 100 and the second match circuit 200 include several groups capacitor control circuit in parallel, i.e. Can(Ca1…
Can) capacitor array and Cbm(Cb1…Cbm) capacitance battle array, inductive circuit is by an electric inductance array (L1And L2) composition, wherein CanCapacitance
Array, CbmEach capacitance or inductance in capacitor array and electric inductance array are connected with an individual electromagnetic relay,
Such as CanEach capacitance in capacitor array respectively with electromagnetic relay (A1…An) connect, CbmEach capacitance difference in capacitance battle array
With electromagnetic relay (D1…Dm) connect, inductance L1And L2Respectively with electromagnetic relay H1And H2Series connection.
The closure of electromagnetic relay is controlled with disconnection by the digital port on MCU.When output is high level, electromagnetic relay
It is closed；When output is low level, electromagnetic relay disconnects.Building for above-mentioned impedance matching network is exactly by controlling specific electromagnetism
What the closure of relay was realized with disconnection.Above-mentioned impedance matching network can realize L-type impedance matching network (electromagnetic relay
K1Beat to the ends B), it can also realize reverse L type impedance matching network (electromagnetic relay K1Beat to the ends A), in actual circuit, CanCapacitance
Array and electric inductance array (L1Or L2) it is composed in series equivalent series element, CbmCapacitor array forms alone parallel element.
When the original state of system, impedance matching network is not linked into transmitting terminal LC resonance coil, therefore schemes
Middle electromagnetic relay E1, electromagnetic relay F1It is closed, electromagnetic relay K2It disconnects, electromagnetic relay K1It can beat arbitrary to A or B
One end.
When MCU judgements are thought to need to access L-type impedance matching network, electromagnetic relay K1It is closed, electromagnetic relay K1It beats
To the ends B, electromagnetic relay H1It is closed, electromagnetic relay H2, electromagnetic relay F1Disconnect (the L i.e. in electric inductance array1Access electricity
Road, L2It does not connect).In capacitor array CanIn, electromagnetic relay A1To AnOne of be closed；In capacitor array CbmIn, electromagnetism
Relay D1To DmOne of be closed, by the above-mentioned means, above-mentioned L-type impedance matching network can be built.
When MCU judgements are thought to need to access reverse L type impedance matching network, electromagnetic relay K1It is closed, electromagnetic relay K1
It beats to the ends A, electromagnetic relay H2It is closed, electromagnetic relay H1, electromagnetic relay F1Disconnection (accesses inductance in electric inductance array
L2), then in capacitor array CanIn, electromagnetic relay A1To AnAny one closure, then in capacitor array CbmIn, electromagnetism
Relay D1To DmAny one closure, by the above-mentioned means, above-mentioned reverse L type impedance matching network can be built.
Wireless charging Adaptive impedance matching system provided by the present invention, above-mentioned first impedance matching network and the second resistance
Anti- network includes the first match circuit, the second match circuit, inductive circuit and single-pole double-throw switch (SPDT), wherein the first matching electricity
Road is connected with above-mentioned inductive circuit, and the first non-moving end of single-pole double-throw switch (SPDT) is connect with above-mentioned first match circuit, single-pole double throw
Second non-moving end of switch is connect with above-mentioned inductive circuit, and the moved end of single-pole double-throw switch (SPDT) is connect with second match circuit；
In addition, above-mentioned first match circuit and the second match circuit include the capacitor control circuit that several groups are in parallel, the Capacity control
Circuit includes concatenated capacitance and capacitance controlled switches, and above-mentioned inductive circuit includes the inductance control circuit of several groups parallel connection, should
Inductive circuit includes that concatenated inductance is switched with inductance control.Above system provided by the present invention can be according to the defeated of transmitting terminal
Enter the parameters such as impedance, build impedance matching network, so as to when receiving terminal is in mobile status, prevent transmitting terminal LC resonance
The impedance variations of coil are excessive, ensure that power amplifier being capable of normal output power.
Further, the present invention also provides a kind of wireless charging Adaptive impedance matching method, this method is applied to this hair
Wireless charging Adaptive impedance matching system provided in bright first embodiment is that the present invention second is implemented with reference to Fig. 3, Fig. 3
The flow diagram of wireless charging Adaptive impedance matching method in example, in the embodiment of the present invention, the above method includes：
Step 301, every preset time interval, measure the input impedance Z of the first transmitting terminal LC resonance coilA, and
Mutual inductance M between first transmitting terminal LC resonance coil and receiving terminal LC resonance coil1；
In the embodiment of the present invention, after powering on to the first transmitting terminal, corresponding first power of the first transmitting terminal is put
Big device can export a sinusoidal signal wave with certain frequency, and the sinusoidal signal wave is by corresponding first resistance of the first transmitting terminal
The first transmitting terminal LC resonance coil is acted on after anti-matching network, and forms the alternating electromagnetism with certain frequency in space
.
Wherein, the input impedance of the first transmitting terminal LC resonance coil is measured by the first detection module in the first transmitting terminal
ZAAnd the first mutual inductance M between transmitting terminal LC resonance coil and receiving terminal LC resonance coil1。
Step 302, the input impedance Z for measuring the second transmitting terminal LC resonance coilBAnd the second transmitting terminal LC resonance coil
With the mutual inductance M between receiving terminal LC resonance coil2；
In the embodiment of the present invention, after powering on to the second transmitting terminal, corresponding second power of the second transmitting terminal is put
Big device can also export a sinusoidal signal wave with certain frequency, which passes through the second transmitting terminal corresponding second
The second transmitting terminal LC resonance coil is acted on after impedance matching network, and forms the alternating electromagnetism with certain frequency in space
.
Wherein, the input impedance of the second transmitting terminal LC resonance coil is measured by the second detection module in the second transmitting terminal
ZBAnd the second mutual inductance M between transmitting terminal LC resonance coil and receiving terminal LC resonance coil2。
It is understood that above-mentioned steps 301 have no precedence relationship with step 302, i.e., in the embodiment of the present invention, every pre-
If time interval (such as T seconds), it is just synchronous to execute step 301 and step 302.
Step 303, according to the input impedance ZAWith input impedance ZBSelect the first impedance matching network and the second impedance
The network type of distribution network, and according to the network type of selection, the mutual inductance M1And mutual inductance M2Calculate separately described
The value of each component in one impedance matching network and the second impedance matching network；
In the embodiment of the present invention, it should be appreciated that in double bills receive formula magnetic resonance wireless charging system, correspond to not
Same receiving terminal spatial position, impedance variations and the second transmitting terminal LC resonance of the first transmitting terminal LC resonance coil caused by it
The impedance variations of coil are different, this depends on receiving terminal LC resonance coil and the first transmitting terminal LC resonance coil, second
Relative position between transmitting terminal LC resonance coil.It is usually the case that the first transmitting terminal LC resonance coil and the second transmitting
End LC resonance coil has respectively different input impedance, therefore required impedance matching network (type, element choosing value) is
Different.
Specifically, can be according to above-mentioned input impedance ZAWith input impedance ZBTo select the first impedance matching network and second
The network type of impedance matching network, then further according to the network type of selection, above-mentioned mutual inductance M1And mutual inductance M2Respectively
Calculate the value of each component in first impedance matching network and the second impedance matching network.
Step 304 builds first impedance matching network and the second impedance respectively according to the value of each component
Distribution network.
In the embodiment of the present invention, each member in calculating above-mentioned first impedance matching network and the second impedance matching network
After the value of device, you can build above-mentioned first impedance matching network and the second impedance matching net respectively according to result of calculation
Network, using the first impedance matching network and the second impedance matching network put up come with the first transmitting terminal and the second transmitting terminal into
Row impedance matching.
Wireless charging Adaptive impedance matching method provided by the present invention, including：Every preset time interval, measure
The input impedance Z of first transmitting terminal LC resonance coilAAnd first transmitting terminal LC resonance coil and receiving terminal LC resonance coil it
Between mutual inductance M1, then measure the input impedance Z of the second transmitting terminal LC resonance coilBAnd the second transmitting terminal LC resonance line
Mutual inductance M between circle and receiving terminal LC resonance coil2, according to above-mentioned input impedance ZAWith input impedance ZBThe first resistance of selection
The network type of anti-matching network and the second impedance matching network, and according to the network type of selection, above-mentioned mutual inductance M1And
Mutual inductance M2The value of each component in above-mentioned first impedance matching network and the second impedance matching network is calculated separately, then root
Above-mentioned first impedance matching network and the second impedance matching network are built respectively according to the value of each component.The present invention can be
It when receiving terminal is in mobile status, prevents the impedance variations of transmitting terminal LC resonance coil excessive, avoids transmitting terminal LC resonance line
The input impedance of circle and the unmatched problem of the equivalent internal resistance of power amplifier ensure that power amplifier being capable of normal output work
Rate.
Further, it is based on second embodiment of the invention, is step 301 in second embodiment of the invention with reference to Fig. 4, Fig. 4
Refinement step flow diagram, in the embodiment of the present invention, above-mentioned steps 301 include：
Step 401, the corresponding second power amplifier power-off of the second transmitting terminal of control, the first transmitting terminal of control corresponding the
One power amplifier is powered；
In the embodiment of the present invention, control signal is sent out by above-mentioned MCU, controls above-mentioned second power amplifier power-off, first
Power amplifier is powered.
Step 402, the phase and amplitude for detecting the first transmitting terminal LC resonance coil；
In the embodiment of the present invention, the phase and width of the first transmitting terminal LC resonance coil are detected by above-mentioned first detection module
Then the phase detected and amplitude are sent to above-mentioned MCU by degree.
Step 403, according to the phase and amplitude of the first transmitting terminal LC resonance coil, calculate the first transmitting terminal LC
The input impedance Z of resonance coilAAnd the first mutual inductance between transmitting terminal LC resonance coil and receiving terminal LC resonance coil
M1, wherein ZA=RA+jXA, RAIndicate input impedance ZAReal part, XAIndicate input impedance ZAImaginary part.
In the embodiment of the present invention, after above-mentioned MCU receives the phase and amplitude of first detection module transmission, you can according to
Preset algorithm calculates the input impedance Z of above-mentioned first transmitting terminal LC resonance coilAAnd the first transmitting terminal LC resonance coil
With the mutual inductance M between receiving terminal LC resonance coil1。
Further, it is the refinement step flow diagram of step 302 in second embodiment of the invention with reference to Fig. 5, Fig. 5,
In the embodiment of the present invention, above-mentioned steps 302 include：
Step 501, the corresponding first power amplifier power-off of the first transmitting terminal of control, the second transmitting terminal of control corresponding the
Two power amplifiers are powered；
In the embodiment of the present invention, control signal is sent out by MCU, controls above-mentioned first power amplifier power-off, the second power
Amplifier is powered.
Step 502, the phase and amplitude for detecting the second transmitting terminal LC resonance coil；
In the embodiment of the present invention, the phase and amplitude of two transmitting terminal LC resonance coils are detected by the second detection module, then
The phase detected and amplitude are sent to above-mentioned MCU.
Step 503, according to the phase and amplitude of the second transmitting terminal LC resonance coil, calculate the second transmitting terminal LC
The input impedance Z of resonance coilBAnd the second mutual inductance between transmitting terminal LC resonance coil and receiving terminal LC resonance coil
M2, wherein ZB=RB+jXB, RBIndicate input impedance ZBReal part, XBIndicate input impedance ZBImaginary part.
In the embodiment of the present invention, after above-mentioned MCU receives the phase and amplitude of the second detection module transmission, you can according to
Preset algorithm calculates the input impedance Z of above-mentioned second transmitting terminal LC resonance coilBAnd the second transmitting terminal LC resonance coil
With the mutual inductance M between receiving terminal LC resonance coil2。
The wireless charging Adaptive impedance matching method that the embodiment of the present invention is provided, this method pass through individually to the first hair
It penetrates corresponding first power amplifier in end or corresponding second power amplifier of the second transmitting terminal is powered, to detect the first hair respectively
The phase and amplitude for penetrating the phase and amplitude and the second transmitting terminal LC resonance coil of end LC resonance coil, then calculate separately again
Between the input impedance of above-mentioned first transmitting terminal LC resonance coil, the first transmitting terminal LC resonance coil and receiving terminal LC resonance coil
Mutual inductance and the second transmitting terminal LC resonance coil input impedance, the second transmitting terminal LC resonance coil and receiving terminal LC
Mutual inductance between resonance coil can determine each in impedance matching network type and impedance matching network using result of calculation
The value of component then builds corresponding impedance matching network.
Further, it is based on second embodiment of the invention, in the embodiment of the present invention, above-mentioned steps 303 include the following steps：
As the input impedance ZAWith input impedance ZBReal part when being all higher than preset equivalent internal resistance, select topology A types to hinder
Network type of the anti-matching network as first impedance matching network and the second impedance matching network；
In the embodiment of the present invention, in most cases, the input impedance Z of the first transmitting terminal LC resonance coilAWith the second hair
Penetrate the input impedance Z of end LC resonance coilBIt is a plural number, is made of real and imaginary parts.Assuming that above-mentioned first power amplifier
Equivalent internal resistance with the second power amplifier is Z0, according to impedance matching principle, need the first transmitting terminal LC resonance coil
Input impedance ZAWith the input impedance Z of the second transmitting terminal LC resonance coilBIt is respectively matched to above-mentioned equivalent internal resistance Z0Even ZA
=Z0,ZB=Z0.The first impedance matching network is equivalent to plus after the first transmitting terminal LC resonance coil, total input impedance is Z0；
After second impedance matching network adds the second transmitting terminal LC resonance coil, total input impedance is also Z simultaneously0。
Wherein, when MCU obtains the input impedance Z of the first transmitting terminal LC resonance coilAWith the second transmitting terminal LC resonance coil
Input impedance ZBAfterwards, MCU can be by input impedance ZAReal part RA, input impedance ZBReal part RBWith the equal Z of above-mentioned equivalent internal resistance0Into
Row compares, and the network type of the first impedance matching network and the second impedance matching network is then selected according to comparison result.
Specifically, working as RA>Z0, and RB>Z0When, then select topological A types impedance matching network, i.e. the first impedance matching network
L-type impedance matching network is used with the second impedance matching network, is topology A type impedance matchings in the present invention with reference to Fig. 6, Fig. 6
The structural schematic diagram of network.
The series element X in first impedance matching network is calculated according to following formulaAValue：
The parallel element B in first impedance matching network is calculated according to following formulaAValue：
The series element X in second impedance matching network is calculated according to following formulaBValue：
The parallel element B in second impedance matching network is calculated according to following formulaBValue：
Wherein, m1Indicate mutual inductance M1Corresponding parameter, m2Indicate mutual inductance M2Corresponding parameter, M1,2Indicate first
Mutual inductance between transmitting terminal LC resonance coil and the second transmitting terminal LC resonance coil, M2,1Indicate the second transmitting terminal LC resonance
Mutual inductance between coil and the first transmitting terminal LC resonance coil.
Wherein,zLIndicate the impedance of all components in addition to receiving terminal
Value, RLIndicate the load impedance of receiving terminal.
Work as RA<Z0, and RB<Z0When, then select topological Type B impedance matching network, i.e. the first impedance matching network and the second resistance
Anti- matching network uses reverse L type impedance matching network, is topological Type B impedance matching network in the present invention with reference to Fig. 7, Fig. 7
Structural schematic diagram.
The series element X in first impedance matching network is calculated according to following formulaAValue：
The parallel element B in first impedance matching network is calculated according to following formulaAValue：
The series element X in second impedance matching network is calculated according to following formulaBValue：
The parallel element B in second impedance matching network is calculated according to following formulaBValue：
Wherein, m1Indicate mutual inductance M1Corresponding parameter, m2Indicate mutual inductance M2Corresponding parameter, M1,2Indicate first
Mutual inductance between transmitting terminal LC resonance coil and the second transmitting terminal LC resonance coil, M2,1Indicate the second transmitting terminal LC resonance
Mutual inductance between coil and the first transmitting terminal LC resonance coil.
Wherein,zLIndicate the impedance of all components in addition to receiving terminal
Value, RLIndicate the load impedance of receiving terminal.
Work as RA>Z0, and RB<Z0When, then select topological c-type impedance matching network, i.e. the first impedance matching network to use L-type
Impedance matching network, the second impedance matching network use reverse L type impedance matching network, are topology C in the present invention with reference to Fig. 8, Fig. 8
The structural schematic diagram of type impedance matching network.
The series element X in first impedance matching network is calculated according to following formulaAValue：
The parallel element B in first impedance matching network is calculated according to following formulaAValue：
The series element X in second impedance matching network is calculated according to following formulaBValue：
The parallel element B in second impedance matching network is calculated according to following formulaBValue：
Wherein, m1Indicate mutual inductance M1Corresponding parameter, m2Indicate mutual inductance M2Corresponding parameter, M1,2Indicate first
Mutual inductance between transmitting terminal LC resonance coil and the second transmitting terminal LC resonance coil, M2,1Indicate the second transmitting terminal LC resonance
Mutual inductance between coil and the first transmitting terminal LC resonance coil.
Wherein,zLIndicate the impedance of all components in addition to receiving terminal
Value, RLIndicate the load impedance of receiving terminal.
Work as RA<Z0, and RB>Z0When, then select topological D types impedance matching network, i.e. the first impedance matching network to use reverse L
Type impedance matching network, the second impedance matching network use L-type impedance matching network, are topology D in the present invention with reference to Fig. 9, Fig. 9
The structural schematic diagram of type impedance matching network.
The series element X in first impedance matching network is calculated according to following formulaAValue：
The parallel element B in first impedance matching network is calculated according to following formulaAValue：
The series element X in second impedance matching network is calculated according to following formulaBValue：
The parallel element B in second impedance matching network is calculated according to following formulaBValue：
Wherein, m1Indicate mutual inductance M1Corresponding parameter, m2Indicate mutual inductance M2Corresponding parameter, M1,2Indicate first
Mutual inductance between transmitting terminal LC resonance coil and the second transmitting terminal LC resonance coil, M2,1Indicate the second transmitting terminal LC resonance
Mutual inductance between coil and the first transmitting terminal LC resonance coil.
Wherein,zLIndicate the impedance of all components in addition to receiving terminal
Value, RLIndicate the load impedance of receiving terminal.
In addition, theoretically RAOr RBValue may just be equal to Z0, but the possibility that such case occurs is very low,
In order to reduce the complexity of automatic impedance matching system network, the technical program does not consider this situation work.
The wireless charging Adaptive impedance matching method that the embodiment of the present invention is provided can be hindered by comparing according to input
Anti- ZA, input impedance ZBWith the magnitude relationship between preset equivalent internal resistance, to select the first impedance matching network and the second impedance
The network type of matching network, then according to the network type of selection, above-mentioned mutual inductance M1And mutual inductance M2It can count respectively
The value of each component in above-mentioned first impedance matching network and the second impedance matching network is calculated, and then can be according to result of calculation
Build corresponding impedance matching network.
Further, 0, Figure 10 is wireless charging Adaptive impedance matching method in third embodiment of the invention referring to Fig.1
Flow diagram, in the embodiment of the present invention, the above method includes：
Step 1001, every preset time interval, measure the input impedance Z of the first transmitting terminal LC resonance coilA, and
Mutual inductance M between first transmitting terminal LC resonance coil and receiving terminal LC resonance coil1；
Step 1002, the input impedance Z for measuring the second transmitting terminal LC resonance coilBAnd the second transmitting terminal LC resonance line
Mutual inductance M between circle and receiving terminal LC resonance coil2；
Step 1003, according to the input impedance ZAWith input impedance ZBSelect the first impedance matching network and the second impedance
The network type of matching network, and according to the network type of selection, the mutual inductance M1And mutual inductance M2It calculates separately described
The value of each component in first impedance matching network and the second impedance matching network；
In the embodiment of the present invention, step 301 in above-mentioned steps 1001 to step 1003 and second embodiment of the invention to
Content described in step 303 is consistent, please refers to second embodiment of the invention, and details are not described herein again.
Step 1004 determines each member that can be actually provided in first impedance matching network and the second impedance matching network
Each actual value of device；
It is understood that in 1003 calculated first impedance matching network of above-mentioned steps and the second impedance matching network
The value of each component belongs to theoretical value, and in practical situations, the value of component is typically fixed, therefore in order to using now
Some components build above-mentioned first impedance matching network and the second impedance matching network, need first to determine first impedance
The each actual value for each component that can be actually provided in distribution network and the second impedance matching network.
Step 1005 determines each component in calculated first impedance matching network and the second impedance matching network
Value and first impedance matching network and the second impedance matching network in can actually provide each component it is each true
Error between value；
Step 1006 determines each member in first impedance matching network and the second impedance matching network based on the error
The actual value of device.
In the embodiment of the present invention, the first impedance matching network and the second impedance matching network use identical impedance matching net
Network, with reference to Fig. 2, in Fig. 2, the impedance matching network is by the first match circuit, the second match circuit, inductive circuit and single-pole double throw
Switch composition, the first match circuit and the second match circuit are including several groups capacitor control circuit in parallel, i.e. Can(Ca1…
Can) capacitor array and Cbm(Cb1…Cbm) capacitance battle array, inductive circuit is by an electric inductance array (L1And L2) composition, wherein CanCapacitance
Array, CbmEach capacitance or inductance in capacitor array and electric inductance array are connected with an individual electromagnetic relay,
Such as CanEach capacitance in capacitor array respectively with electromagnetic relay (A1…An) connect, CbmEach capacitance difference in capacitance battle array
With electromagnetic relay (D1…Dm) connect, inductance L1And L2Respectively with electromagnetic relay H1And H2Series connection.
Wherein, the closure of electromagnetic relay is controlled with disconnection by the digital port on MCU.When output is high level, electromagnetism
Relay is closed；When output is low level, electromagnetic relay disconnects.Building for above-mentioned impedance matching network is exactly special by controlling
Determine closure and the disconnection of electromagnetic relay to realize.Above-mentioned impedance matching network can realize L-type impedance matching network (electromagnetism
Relay K1Beat to the ends B), it can also realize reverse L type impedance matching network (electromagnetic relay K1Beat to the ends A), in actual circuit,
CanCapacitor array and electric inductance array (L1Or L2) it is composed in series equivalent series element, CbmCapacitor array forms alone parallel element.
When the original state of system, impedance matching network is not linked into transmitting terminal LC resonance coil, therefore schemes
Middle electromagnetic relay E1, electromagnetic relay F1It is closed, electromagnetic relay K2It disconnects, electromagnetic relay K1It can beat arbitrary to A or B
One end.
When MCU judgements are thought to need to access L-type impedance matching network, electromagnetic relay K1It is closed, electromagnetic relay K1It beats
To the ends B, electromagnetic relay H1It is closed, electromagnetic relay H2, electromagnetic relay F1Disconnect (the L i.e. in electric inductance array1Access electricity
Road, L2It does not connect).In capacitor array CanIn, electromagnetic relay A1To AnOne of be closed；In capacitor array CbmIn, electromagnetism
Relay D1To DmOne of be closed, by the above-mentioned means, above-mentioned L-type impedance matching network can be built.In the L-type
In impedance matching network, the reactance value of series equivalent element isMCU can calculate all
XNThe value of (N=1 ... n), then by each XN(N=1 ... n) value be calculated respectively with step 1003 about L-type impedance
X in distribution networkA(or XB) value is compared, with XA(or XB) difference square minimum XNIt will be confirmed as final L-type impedance
X used by matching networkN, capacitor array CanIn correspond to capacitance CaNOn electromagnetic relay AnIt will be closed.Similarly, and
The reactance value for joining element is BM=ω CBM(M=1 ... m), MCU can calculate all BMThe value of (M=1 ... m), then by each BM
The B about L-type impedance matching network that (M=1 ... m) is calculated with step 1003A(or BB) value is compared, with BA(or
BB) value difference square minimum BMValue will be as final BMValue, capacitor array CbmIn corresponding capacitance CbMOn electromagnetism
Relay DmIt will be closed.
When MCU judgements are thought to need to access reverse L type impedance matching network, electromagnetic relay K1It is closed, electromagnetic relay K1
It beats to the ends A, electromagnetic relay H2It is closed, electromagnetic relay H1, electromagnetic relay F1Disconnection (accesses inductance in electric inductance array
L2), then in capacitor array CanIn, electromagnetic relay A1To AnAny one closure, then in capacitor array CbmIn, electromagnetism
Relay D1To DmAny one closure, by the above-mentioned means, above-mentioned reverse L type impedance matching network can be built.It is anti-at this
In L-type impedance matching network, the reactance value of series equivalent element isMCU can be calculated
All XNThe value of (N=1 ... n), then by each XN(N=1 ... n) value be calculated respectively with step 1003 about reverse L type
X in impedance matching networkA(or XB) value is compared, with XA(or XB) difference square minimum XNIt will be confirmed as final anti-
X used by L-type impedance matching networkN, capacitor array CanIn corresponding capacitance CaNOn electromagnetic relay AnIt will be closed.
Similarly, the capacitor value of shunt capacitance is BM=ω CBM(M=1 ... m), MCU can calculate all BMThe value of (M=1 ... m), then
By each BMThe B about reverse L type impedance matching network that (M=1 ... m) is calculated with step 1003A(or BB) value compared
Compared with BA(or BB) value difference square minimum BMValue will be as final BMValue, corresponding capacitor array CbmIn it is right
The capacitance C answeredbMOn electromagnetic relay DmIt will be closed.
About CanEach capacitance (C in capacitor arraya1…Can) choosing value, CbmEach capacitance in capacitor array
(Ca1…Can) choosing value and electric inductance array L1, L2Choosing value, for the magnet coupled resonant type wireless charging system of different frequency,
It selects value difference very not big, therefore is not described herein in the technical scheme.General method is, in design automatic impedance matching network
Before, by experiment using Network Analyzer progress related experiment, in receiving terminal moving process, transmitting terminal LC resonance coil it is defeated
The variation for entering impedance is recorded, and the maximum magnitude of input impedance variation is then obtained, then according to this maximum variation model
It encloses to CanCapacitor array, CbmCapacitor array and electric inductance array carry out choosing value.
Step 1007, according to the reality of each component in first impedance matching network and the second impedance matching network
Value respectively drives first impedance matching network and the capacitor control circuit in the second impedance matching network and inductance control electricity
Road so that the value of each component is equal to each component pair in first impedance matching network and the second impedance matching network
The actual value answered.
In the embodiment of the present invention, each member device in determining above-mentioned first impedance matching network and the second impedance matching network
After the actual value of part, MCU can be according to as a result, drive corresponding digital port to high level state, corresponding electromagnetic relay
It can rapid closing；And the digital port being not driven keeps low level state, corresponding electromagnetic relay remains open, to take
Build corresponding impedance matching network.
The wireless charging Adaptive impedance matching method that the embodiment of the present invention is provided first determines first impedance matching
Then each actual value for each component that can be actually provided in network and the second impedance matching network determines calculated first
The value of each component and above-mentioned first impedance matching network and the second impedance in impedance matching network and the second impedance matching network
Error between each actual value for each component that can be actually provided in matching network determines above-mentioned first resistance based on the error
The actual value of each component in anti-matching network and the second impedance matching network, finally respectively drives above-mentioned first impedance matching net
Network and the capacitor control circuit in the second impedance matching network and inductance control circuit so that first impedance matching network with
The value of each component is equal to the corresponding actual value of each component in second impedance matching network, to build corresponding impedance
Distribution network.
In several embodiments provided herein, it should be understood that disclosed device and method can pass through it
Its mode is realized.For example, the apparatus embodiments described above are merely exemplary, for example, the division of the module, only
Only a kind of division of logic function, formula that in actual implementation, there may be another division manner, such as multiple module or components can be tied
Another system is closed or is desirably integrated into, or some features can be ignored or not executed.Another point, it is shown or discussed
Mutual coupling, direct-coupling or communication connection can be the INDIRECT COUPLING or logical by some interfaces, device or module
Letter connection can be electrical, machinery or other forms.
The module illustrated as separating component may or may not be physically separated, aobvious as module
The component shown may or may not be physical module, you can be located at a place, or may be distributed over multiple
On network module.Some or all of module therein can be selected according to the actual needs to realize the mesh of this embodiment scheme
's.
In addition, each function module in each embodiment of the present invention can be integrated in a processing module, it can also
That modules physically exist alone, can also two or more modules be integrated in a module.Above-mentioned integrated mould
The form that hardware had both may be used in block is realized, can also be realized in the form of software function module.
If the integrated module is realized in the form of software function module and sells or use as independent product
When, it can be stored in a computer read/write memory medium.Based on this understanding, technical scheme of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the present invention
Portion or part steps.And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
It should be noted that for each method embodiment above-mentioned, describe, therefore it is all expressed as a series of for simplicity
Combination of actions, but those skilled in the art should understand that, the present invention is not limited by the described action sequence because
According to the present invention, certain steps may be used other sequences or be carried out at the same time.Secondly, those skilled in the art should also know
It knows, embodiment described in this description belongs to preferred embodiment, and involved action and module might not all be this hairs
Necessary to bright.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, there is no the portion being described in detail in some embodiment
Point, it may refer to the associated description of other embodiments.
Be above to a kind of description of wireless charging Adaptive impedance matching System and method for provided by the present invention, for
Those skilled in the art, the thought of embodiment, has change in specific embodiments and applications according to the present invention
Place, to sum up, the content of the present specification should not be construed as limiting the invention.
Claims (11)
1. a kind of wireless charging Adaptive impedance matching system, which is characterized in that the system comprises the first transmitting terminal, the second hairs
Penetrate end, receiving terminal and micro-control unit MCU；
First transmitting terminal include the first power amplifier, the first impedance matching network, the first transmitting terminal LC resonance coil and
First detection module；The output end of first power amplifier is connect with the input terminal of first impedance matching network, institute
The output end for stating the first impedance matching network is connect with the input terminal of the first detection module, the first detection module it is defeated
Outlet is connect with the input terminal of the first transmitting terminal LC resonance coil, the signal end of convert of the first detection module with it is described
The input terminal of the signal input part of MCU and first power amplifier connects；The digital signal port of the MCU and described the
The control terminal of one impedance matching network connects；
Second transmitting terminal include the second power amplifier, the second impedance matching network, the second transmitting terminal LC resonance coil and
Second detection module；The output end of second power amplifier is connect with the input terminal of second impedance matching network, institute
The output end for stating the second impedance matching network is connect with the input terminal of second detection module, second detection module it is defeated
Outlet is connect with the input terminal of the second transmitting terminal LC resonance coil, the signal end of convert of second detection module respectively with
The input terminal of the signal input part of the MCU and second power amplifier connects；The digital signal port of the MCU and institute
State the control terminal connection of the second impedance matching network；
The receiving terminal includes receiving terminal LC resonance coil, full bridge rectifier, DC-DC regulator circuits, and the receiving terminal LC is humorous
Shake coil, the full bridge rectifier and the DC-DC regulator circuits is sequentially connected, and the receiving terminal LC resonance coil is for feeling
The alternating electromagnetic field for answering the first transmitting terminal LC resonance coil and the second transmitting terminal LC resonance coil to generate.
2. system according to claim 1, which is characterized in that first impedance matching network and the second impedance network are equal
Including the first match circuit, the second match circuit, inductive circuit and single-pole double-throw switch (SPDT)；
First match circuit is connected with the inductive circuit, the first non-moving end of the single-pole double-throw switch (SPDT) and described first
Match circuit connects, and the second non-moving end of the single-pole double-throw switch (SPDT) is connect with the inductive circuit, the single-pole double-throw switch (SPDT)
Moved end connect with second match circuit.
3. system according to claim 2, which is characterized in that first match circuit includes with the second match circuit
The capacitor control circuit of several groups parallel connection, the capacitor control circuit include capacitance and capacitance controlled switches, the capacitance and institute
State capacitance controlled switches series connection；
The inductive circuit includes the inductance control circuit of several groups parallel connection, and the inductive circuit includes that inductance is opened with inductance control
It closes, the inductance is connected with inductance control switch.
4. a kind of wireless charging Adaptive impedance matching method, which is characterized in that the method is appointed applied to claims 1 to 3
Wireless charging Adaptive impedance matching system described in meaning one, the method includes：
Every preset time interval, the input impedance Z of the first transmitting terminal LC resonance coil is measuredAAnd first transmitting terminal LC it is humorous
The mutual inductance M to shake between coil and receiving terminal LC resonance coil1；
Measure the input impedance Z of the second transmitting terminal LC resonance coilBAnd second transmitting terminal LC resonance coil and receiving terminal LC it is humorous
The mutual inductance M to shake between coil2；
According to the input impedance ZAWith input impedance ZBSelect the network of the first impedance matching network and the second impedance matching network
Type, and according to the network type of selection, the mutual inductance M1And mutual inductance M2Calculate separately the first impedance matching net
The value of each component in network and the second impedance matching network；
First impedance matching network and the second impedance matching network are built respectively according to the value of each component.
5. according to the method described in claim 4, it is characterized in that, the input resistance for measuring the first transmitting terminal LC resonance coil
Anti- ZAAnd the first mutual inductance M between transmitting terminal LC resonance coil and receiving terminal LC resonance coil1The step of include：
Control the corresponding second power amplifier power-off of the second transmitting terminal, corresponding first power amplifier of the first transmitting terminal of control
It is powered；
Detect the phase and amplitude of the first transmitting terminal LC resonance coil；
According to the phase and amplitude of the first transmitting terminal LC resonance coil, the defeated of the first transmitting terminal LC resonance coil is calculated
Enter impedance ZAAnd the first mutual inductance M between transmitting terminal LC resonance coil and receiving terminal LC resonance coil1, wherein ZA=
RA+jXA, RAIndicate input impedance ZAReal part, XAIndicate input impedance ZAImaginary part.
6. according to the method described in claim 4, it is characterized in that, the input resistance for measuring the second transmitting terminal LC resonance coil
Anti- ZBAnd the second mutual inductance M between transmitting terminal LC resonance coil and receiving terminal LC resonance coil2The step of include：
Control the corresponding first power amplifier power-off of the first transmitting terminal, corresponding second power amplifier of the second transmitting terminal of control
It is powered；
Detect the phase and amplitude of the second transmitting terminal LC resonance coil；
According to the phase and amplitude of the second transmitting terminal LC resonance coil, the defeated of the second transmitting terminal LC resonance coil is calculated
Enter impedance ZBAnd the second mutual inductance M between transmitting terminal LC resonance coil and receiving terminal LC resonance coil2, wherein ZB=
RB+jXB, RBIndicate input impedance ZBReal part, XBIndicate input impedance ZBImaginary part.
7. according to the method described in claim 4, it is characterized in that, described according to the input impedance ZAWith input impedance ZBChoosing
The network type of the first impedance matching network and the second impedance matching network is selected, and according to the network type of selection, the mutual inductance
Coefficient M1And mutual inductance M2Calculate separately the value of each component in first impedance matching network and the second impedance matching network
The step of include：
As the input impedance ZAWith input impedance ZBReal part when being all higher than the equivalent internal resistance of preset power amplifier, selection
Network type of the topological A types impedance matching network as first impedance matching network and the second impedance matching network；
The series element X in first impedance matching network is calculated according to following formulaAValue：
The parallel element B in first impedance matching network is calculated according to following formulaAValue：
The series element X in second impedance matching network is calculated according to following formulaBValue：
The parallel element B in second impedance matching network is calculated according to following formulaBValue：
Wherein, m1Indicate mutual inductance M1Corresponding parameter, m2Indicate mutual inductance M2Corresponding parameter, M1,2Indicate the first transmitting
Hold the mutual inductance between LC resonance coil and the second transmitting terminal LC resonance coil, M2,1Indicate the second transmitting terminal LC resonance coil
With the mutual inductance between the first transmitting terminal LC resonance coil.
8. according to the method described in claim 4, it is characterized in that, described according to the input impedance ZAWith input impedance ZBChoosing
The network type of the first impedance matching network and the second impedance matching network is selected, and according to the network type of selection, the mutual inductance
Coefficient M1And mutual inductance M2Calculate separately the value of each component in first impedance matching network and the second impedance matching network
The step of include：
As the input impedance ZAWith input impedance ZBReal part when being respectively less than the equivalent internal resistance of preset power amplifier, selection
Network type of the topological Type B impedance matching network as first impedance matching network and the second impedance matching network；
The series element X in first impedance matching network is calculated according to following formulaAValue：
The parallel element B in first impedance matching network is calculated according to following formulaAValue：
The series element X in second impedance matching network is calculated according to following formulaBValue：
The parallel element B in second impedance matching network is calculated according to following formulaBValue：
Wherein, m1Indicate mutual inductance M1Corresponding parameter, m2Indicate mutual inductance M2Corresponding parameter, M1,2Indicate the first transmitting
Hold the mutual inductance between LC resonance coil and the second transmitting terminal LC resonance coil, M2,1Indicate the second transmitting terminal LC resonance coil
With the mutual inductance between the first transmitting terminal LC resonance coil.
9. according to the method described in claim 4, it is characterized in that, described according to the input impedance ZAWith input impedance ZBChoosing
The network type of the first impedance matching network and the second impedance matching network is selected, and according to the network type of selection, the mutual inductance
Coefficient M1And mutual inductance M2Calculate separately the value of each component in first impedance matching network and the second impedance matching network
The step of include：
As the input impedance ZAReal part be more than the equivalent internal resistance of preset power amplifier, and the input impedance ZBReality
When portion is less than the equivalent internal resistance, topological c-type impedance matching network is selected to be hindered as first impedance matching network and second
The network type of anti-matching network；
The series element X in first impedance matching network is calculated according to following formulaAValue：
The parallel element B in first impedance matching network is calculated according to following formulaAValue：
The series element X in second impedance matching network is calculated according to following formulaBValue：
The parallel element B in second impedance matching network is calculated according to following formulaBValue：
Wherein, m1Indicate mutual inductance M1Corresponding parameter, m2Indicate mutual inductance M2Corresponding parameter, M1,2Indicate the first transmitting
Hold the mutual inductance between LC resonance coil and the second transmitting terminal LC resonance coil, M2,1Indicate the second transmitting terminal LC resonance coil
With the mutual inductance between the first transmitting terminal LC resonance coil.
10. according to the method described in claim 4, it is characterized in that, described according to the input impedance ZAWith input impedance ZBChoosing
The network type of the first impedance matching network and the second impedance matching network is selected, and according to the network type of selection, the mutual inductance
Coefficient M1And mutual inductance M2Calculate separately the value of each component in first impedance matching network and the second impedance matching network
The step of include：
As the input impedance ZAReal part be less than the equivalent internal resistance of preset power amplifier, and the input impedance ZBReality
When portion is more than the equivalent internal resistance, topology D types impedance matching network is selected to be hindered as first impedance matching network and second
The network type of anti-matching network；
The series element X in first impedance matching network is calculated according to following formulaAValue：
The parallel element B in first impedance matching network is calculated according to following formulaAValue：
The series element X in second impedance matching network is calculated according to following formulaBValue：
The parallel element B in second impedance matching network is calculated according to following formulaBValue：
Wherein, m1Indicate mutual inductance M1Corresponding parameter, m2Indicate mutual inductance M2Corresponding parameter, M1,2Indicate the first transmitting
Hold the mutual inductance between LC resonance coil and the second transmitting terminal LC resonance coil, M2,1Indicate the second transmitting terminal LC resonance coil
With the mutual inductance between the first transmitting terminal LC resonance coil.
11. according to the method described in claim 4 to 10 any one, which is characterized in that the network type according to selection,
The mutual inductance M1And mutual inductance M2Calculate separately each member in first impedance matching network and the second impedance matching network
Further include after the step of value of device：
The each true of each component that can be actually provided in first impedance matching network and the second impedance matching network is provided
Real value；
Determine in calculated first impedance matching network and the second impedance matching network the value of each component and described the
Error between each actual value for each component that can be actually provided in one impedance matching network and the second impedance matching network；
The actual value of each component in first impedance matching network and the second impedance matching network is determined based on the error.
Then the value according to each component builds first impedance matching network and the second impedance matching network respectively
The step of include：
According to the actual value of each component in first impedance matching network and the second impedance matching network, institute is respectively driven
State the first impedance matching network and the capacitor control circuit in the second impedance matching network and inductance control circuit so that described
One impedance matching network and the value of each component in the second impedance matching network are equal to the corresponding actual value of each component.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109713804A (en) * | 2018-12-24 | 2019-05-03 | 珠海格力电器股份有限公司 | A kind of resonance compensation device, charging system and its control method |
| CN110829624A (en) * | 2019-10-18 | 2020-02-21 | 成都斯普奥汀科技有限公司 | Self-adaptive matching system for magnetic resonance wireless charging |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130187598A1 (en) * | 2012-01-20 | 2013-07-25 | Samsung Electronics Co., Ltd. | Apparatus and method for transmitting wireless power by using resonant coupling and system for the same |
| CN103414261A (en) * | 2013-09-06 | 2013-11-27 | 中国矿业大学(北京) | Variable-coupling coefficient magnetic resonance wireless power transmission system and method |
| CN104135088A (en) * | 2014-08-08 | 2014-11-05 | 哈尔滨工业大学 | Non-identical transmitting and receiving coil pair applicable to wireless power transmission and capable of restraining frequency splitting and manufacturing method of non-identical transmitting and receiving coil pair |
| CN205141846U (en) * | 2015-07-07 | 2016-04-06 | 中国矿业大学(北京) | Can realize automatic impedance match's magnetism resonance wireless power transmission system |
| CN106849257A (en) * | 2017-03-13 | 2017-06-13 | 深圳市尧元科技有限公司 | The automatic impedance matching device and method of magnetic coupling resonance formula wireless charging system |
| CN106841813A (en) * | 2017-03-08 | 2017-06-13 | 深圳市尧元科技有限公司 | Measure the device and method of magnetic resonance type wireless charging system transmitting terminal input impedance |
| CN207410122U (en) * | 2017-11-03 | 2018-05-25 | 湖北工业大学 | Magnetic resonance is wireless MISO charging circuits |
-
2017
- 2017-12-19 CN CN201711372993.5A patent/CN108539874B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130187598A1 (en) * | 2012-01-20 | 2013-07-25 | Samsung Electronics Co., Ltd. | Apparatus and method for transmitting wireless power by using resonant coupling and system for the same |
| CN103414261A (en) * | 2013-09-06 | 2013-11-27 | 中国矿业大学(北京) | Variable-coupling coefficient magnetic resonance wireless power transmission system and method |
| CN104135088A (en) * | 2014-08-08 | 2014-11-05 | 哈尔滨工业大学 | Non-identical transmitting and receiving coil pair applicable to wireless power transmission and capable of restraining frequency splitting and manufacturing method of non-identical transmitting and receiving coil pair |
| CN205141846U (en) * | 2015-07-07 | 2016-04-06 | 中国矿业大学(北京) | Can realize automatic impedance match's magnetism resonance wireless power transmission system |
| CN106841813A (en) * | 2017-03-08 | 2017-06-13 | 深圳市尧元科技有限公司 | Measure the device and method of magnetic resonance type wireless charging system transmitting terminal input impedance |
| CN106849257A (en) * | 2017-03-13 | 2017-06-13 | 深圳市尧元科技有限公司 | The automatic impedance matching device and method of magnetic coupling resonance formula wireless charging system |
| CN207410122U (en) * | 2017-11-03 | 2018-05-25 | 湖北工业大学 | Magnetic resonance is wireless MISO charging circuits |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109713804A (en) * | 2018-12-24 | 2019-05-03 | 珠海格力电器股份有限公司 | A kind of resonance compensation device, charging system and its control method |
| CN110829624A (en) * | 2019-10-18 | 2020-02-21 | 成都斯普奥汀科技有限公司 | Self-adaptive matching system for magnetic resonance wireless charging |
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