CN110212653A - Emit the adjustable double resonance formula radio energy transmission system of end-coil and method - Google Patents
Emit the adjustable double resonance formula radio energy transmission system of end-coil and method Download PDFInfo
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- CN110212653A CN110212653A CN201910006250.9A CN201910006250A CN110212653A CN 110212653 A CN110212653 A CN 110212653A CN 201910006250 A CN201910006250 A CN 201910006250A CN 110212653 A CN110212653 A CN 110212653A
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
-
- 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
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/24—Inductive coupling
- H04B5/26—Inductive coupling using coils
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- Computer Networks & Wireless Communication (AREA)
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- Near-Field Transmission Systems (AREA)
Abstract
The present invention provides a kind of adjustable double resonance formula radio energy transmission system of transmitting end-coil and methods, wherein, emit in the adjustable double resonance formula radio energy transmission system of end-coil, transmitting terminal includes transmitting terminal circuit, transmitting terminal off-resonance coil and transmitting terminal resonance coil；System further include: for obtaining the transmitting terminal of system and the control module of the distance between receiving end；Adjust the switching module of the number of turns of transmitting terminal off-resonance coil with certain rule according to distance under the control of control module, switching module and control module communicate to connect.The number of turns that transmitting terminal off-resonance coil is changed by switching coil realizes the magnetic flux control of transmitting terminal off-resonance coil and transmitting terminal resonance coil, realizes stable, efficient energy transmission efficiency in a wide range of；Single-frequency can be used to work for the present invention；The present invention can guarantee that working frequency does not cleave always by changing the number of turns of transmitting terminal off-resonance coil.
Description
Technical field
The present invention relates to wireless power transmission fields, and in particular to a kind of adjustable double resonance formula radio of transmitting end-coil
It can Transmission system and method.
Background technique
It experienced several stages in the development of radio energy transmission system, initial scheme directly generates friendship by coil
Electromagnetic Field inductive coupling formula, although the program (Qi standard) is to have realized volume production at present, its disadvantage is also very prominent, a side
Face is that transmission range is very close (being no more than 10mm), and the energy transmission efficiency of another aspect this method is not high (being lower than 50%), by
This problem for causing chargeable range small.Then can effectively it be mentioned by the magnetic resonance scheme that Massachusetts Institute of Technology professor Marin proposes
The transmission range of energy is risen, but its disadvantage is also clearly, only exists an optimal operating distance, other are imitated apart from lower transmission
Rate can be greatly reduced.Based on magnetic resonance transmission plan, the solution in engineering is by tracking optimal working frequency, the party
Not only circuit design is difficult for method, and can not expand chargeable range.Particularly, under some special scenes, receiving end is limited
The room for improvement (such as the compact apparatus such as mobile phone) of coil and circuit and efficiency and can only be realized by transmitting terminal
Ambulant promotion.In addition, being difficult frequency caused by avoiding interacting under relative close distance due near field in the prior art
Rate cleaves problem.
Therefore, it is necessary to provide a kind of scheme, transmission range present in solution existing radio energy Transmission system is short, passes
The problem that defeated low efficiency, chargeable range are small, working frequency is unstable.
Summary of the invention
In order to solve present in existing radio energy Transmission system, transmission range is short, transmission efficiency is low, chargeable range is small
The problem of, the present invention provides a kind of adjustable double resonance formula radio energy transmission system of transmitting end-coil and methods.
The adjustable double resonance formula radio energy transmission system of transmitting end-coil provided by the invention includes transmitting terminal circuit, hair
It penetrates end off-resonance coil and transmitting terminal resonance coil, the transmitting terminal off-resonance coil is electrically connected to the transmitting terminal circuit, institute
It states transmitting terminal resonance coil and is coupled in the transmitting terminal off-resonance coil, which is characterized in that the transmitting end-coil is adjustable double
Resonant radio energy transmission system further include:
For obtaining the transmitting terminal of the system and the control module of the distance between receiving end；
The transmitting terminal off-resonance coil is adjusted with certain rule according to the distance under the control of the control module
The number of turns switching module, the switching module and the control module communicate to connect.
The present invention realizes transmitting terminal off-resonance coil and transmitting terminal is total by the number of turns of change transmitting terminal off-resonance coil
The magnetic flux control of vibration coil realizes stable, efficient energy transmission efficiency in a wide range of.
The present invention emit the adjustable double resonance formula radio energy transmission system of end-coil further improvement lies in that, the rule
Rule is that the relationship between the number of turns and the distance of the transmitting terminal off-resonance coil is negatively correlated.
The present invention emit the adjustable double resonance formula radio energy transmission system of end-coil further improvement lies in that, the control
Molding block controls the number of turns that the switching module adjusts the transmitting terminal off-resonance coil, so that the resonance mode of the system is locked
It is scheduled on the eigenfrequency of the transmitting terminal resonance coil.
The present invention emit the adjustable double resonance formula radio energy transmission system of end-coil further improvement lies in that, it is described to connect
Receiving end includes receiving end resonance coil, receiving end off-resonance coil and receiving terminal circuit, the receiving end resonance coil resonance coupling
Together in the transmitting terminal resonance coil, the receiving end off-resonance coil is coupled in the receiving end resonance coil, the reception
Terminal circuit is electrically connected to the receiving end off-resonance coil；The transmitting terminal resonance coil magnetic field coupling is non-total in the transmitting terminal
Shake coil；
The receiving end resonance coil magnetic field coupling is in the receiving end off-resonance coil.
The present invention emit the adjustable double resonance formula radio energy transmission system of end-coil further improvement lies in that, the control
Molding block is electrically connected to the transmitting terminal off-resonance coil.
The further improvement that the present invention emits the adjustable double resonance formula radio energy transmission system of end-coil is, described
Control module includes:
For detecting the detection unit of the input current voltage parameter of the transmitting terminal circuit, the detection unit electrical connection
In the transmitting terminal circuit；
It handles the input current voltage parameter and calculates the calculating of the distance according to the input current voltage parameter
Unit, the computing unit are electrically connected to the detection unit；
According to the control unit of switching module described in the distance controlling, it is single that described control unit is electrically connected to the calculating
The first and described switching module.
The present invention emit the adjustable double resonance formula radio energy transmission system of end-coil further improvement lies in that, the hair
Penetrating end off-resonance coil includes the different multiple subcoils of the number of turns；
The first end of the switching module is electrically connected to the transmitting terminal circuit, and the second end of the switching module is changeable
Ground is electrically connected to a subcoil, and the control terminal of the switching module is electrically connected to the control module.
In addition, the present invention also provides a kind of double resonance formula wireless power transmission methods, comprising steps of
A transmitting adjustable double resonance formula radio energy transmission system of end-coil is provided, the transmitting terminal of the system includes hair
Terminal circuit, transmitting terminal off-resonance coil and transmitting terminal resonance coil are penetrated, the transmitting terminal off-resonance coil is electrically connected to the hair
Terminal circuit is penetrated, the transmitting terminal resonance coil is coupled in the transmitting terminal off-resonance coil；
Obtain the distance between transmitting terminal and the receiving end of the system；
The number of turns of the transmitting terminal off-resonance coil is adjusted with certain rule according to the distance, the rule is the hair
The relationship penetrated between the number of turns and the distance of end off-resonance coil is negatively correlated.
Double resonance formula wireless power transmission further improvements in methods of the present invention are, it is described according to the distance with certain
Rule was adjusted in the step of the number of turns of the transmitting terminal off-resonance coil: the circle by adjusting the transmitting terminal off-resonance coil
Number, makes the resonance mode of the system be locked in the eigenfrequency of the transmitting terminal resonance coil.
Double resonance formula wireless power transmission further improvements in methods of the present invention are, the transmitting terminal off-resonance coil packet
Include the different multiple subcoils of the number of turns；
In described the step of adjusting the number of turns of transmitting terminal off-resonance coil according to the distance with certain rule, it will correspond to
The subcoil of the one of the distance is electrically connected to the transmitting terminal circuit.
Detailed description of the invention
Fig. 1 is the energy transmission of the transmitting adjustable double resonance formula radio energy transmission system of end-coil of the embodiment of the present invention
Relation schematic diagram.
Fig. 2 is the primary structure of the transmitting adjustable double resonance formula radio energy transmission system of end-coil of the embodiment of the present invention
Schematic diagram.
Fig. 3 is the flow chart of the double resonance formula wireless power transmission method of the embodiment of the present invention.
Fig. 4 a is system knot when receiving end is located at area of space I and the first subcoil is coupled in transmitting terminal resonance coil
Structure schematic diagram.
Fig. 4 b is that energy transmission efficiency and the relation curve of distance show when the first subcoil is coupled in transmitting terminal resonance coil
It is intended to.
Fig. 5 a is system when receiving end is located at area of space II and the second subcoil is coupled in transmitting terminal resonance coil
Structural schematic diagram.
Fig. 5 b is that energy transmission efficiency and the relation curve of distance show when the second subcoil is coupled in transmitting terminal resonance coil
It is intended to.
Fig. 6 a is system when receiving end is located at area of space III and third subcoil is coupled in transmitting terminal resonance coil
Structural schematic diagram.
Fig. 6 b is that energy transmission efficiency and the relation curve of distance show when third subcoil is coupled in transmitting terminal resonance coil
It is intended to.
Fig. 7 is the energy transmission of the transmitting adjustable double resonance formula radio energy transmission system of end-coil of the embodiment of the present invention
The relation curve schematic diagram of efficiency and distance.
Specific embodiment
In order to solve present in existing radio energy Transmission system, transmission range is short, transmission efficiency is low, chargeable range is small
The problem of, the present invention provides a kind of adjustable double resonance formula radio energy transmission system of transmitting end-coil and methods.
The adjustable double resonance formula wireless power transmission of end-coil is emitted to the present invention in the following with reference to the drawings and specific embodiments
System and method is described further.Those skilled in the art can understand easily the present invention by content disclosed by this specification
Other advantages and effect.
Referring to figs. 1 and 2, the present invention emits the adjustable double resonance formula radio energy transmission system of end-coil, system
Transmitting terminal include transmitting terminal circuit 20, transmitting terminal off-resonance coil 30 and transmitting terminal resonance coil 40, transmitting terminal non-resonance line
Circle 30 is electrically connected to transmitting terminal circuit 20, and transmitting terminal resonance coil 40 is coupled in transmitting terminal off-resonance coil 30, emits end-coil
Adjustable double resonance formula radio energy transmission system further include:
For obtaining the transmitting terminal of system and the control module (not shown) of the distance between receiving end；
The cutting with the number of turns of certain rule adjusting transmitting terminal off-resonance coil 30 according to distance under the control of control module
Block (not shown) is changed the mold, switching module and control module communicate to connect.
In the present invention, it is coupled in the number of turns of the transmitting terminal off-resonance coil 30 of transmitting terminal resonance coil 40 by changing, changes
Become the magnetic flux between transmitting terminal off-resonance coil 30 and transmitting terminal resonance coil 40, changes transmitting terminal off-resonance coil 30
With the channel coupling rate of transmitting terminal resonance coil 40, and then optimize improve transmitting terminal resonance coil 40 and receiving end resonance line
Energy transmission efficiency between circle 50.
Specifically, when the distance between receiving end resonance coil 50 and transmitting terminal resonance coil 40 change, with a set pattern
Rule adjusts 30 the number of turns of transmitting terminal off-resonance coil to current distance is adapted to, so that energy transmission efficiency keeps relative stability simultaneously
Remain in relatively high range, solve transmission range existing in the prior art is short, transmission efficiency is low, charging model
Enclose small technical problem.
In the present embodiment, control module is electrically connected to transmitting terminal off-resonance coil 30, according to transmitting terminal off-resonance coil 30
In interlock circuit parameter calculate distance；Control module is also electrically coupled to switching module, for controlling switching module；Switching module
It is electrically connected between transmitting terminal circuit 20 and transmitting terminal off-resonance coil 30.In other embodiments, the mode of distance is obtained also
Range sensor can be passed through；The mode for adjusting 30 the number of turns of transmitting terminal off-resonance coil can also be to change coil by slide switch
The number of turns；Communication connection mode between switching module and control module can be conductor connections, can also connect for wireless telecommunications
Mode.
Further, rule is that the relationship between the number of turns of transmitting terminal off-resonance coil 30 and distance is negatively correlated.
In the present invention, when distance increases, by reducing the number of turns of transmitting terminal off-resonance coil 30 to keep electric energy to transmit
The stabilization of efficiency；As the distance decreases, by increasing the number of turns of transmitting terminal off-resonance coil 30 to keep electric energy efficiency of transmission
Stablize.
Further, control module control switching module adjusts the number of turns of transmitting terminal off-resonance coil 30, so that system
Resonance mode be locked in the eigenfrequency of transmitting terminal resonance coil 40.
Based on the principle to parity-time (parity-time, PT) symmetrical non-Hermitian physical system, transmitting terminal is adjusted
The number of turns of off-resonance coil 30 can begin the resonance mode of system to avoid resonant frequency because of cleavage effect caused by near-field coupling
It is locked in the eigenfrequency of two resonance coils eventually, to realize that energy transmission efficiency maximizes.
Specifically, the real part of characteristic value illustrates the frequency of system model in non-Hermitian physical system, and characteristic value has void
Portion then indicates that system model has loss, if characteristic value be it is purely real if indicate system model efficiency up to maximum.Work as system
When working frequency is identical as system eigenvalue frequency real part (i.e. the resonance mode of system), energy transmission efficiency is maximum.Existing
Electric energy transmission system in, system resonance mode can change with the change of distance, and system resonance mode also can be with transmitting
It holds the change of the number of turns of off-resonance coil 30 and changes.And in the embodiment of the present invention, by adjusting transmitting terminal off-resonance coil 30
The number of turns, offset influence (especially mode splitting) of the distance to system resonance mode, keep system resonance mode real part not
Become (being maintained near the eigenfrequency of transmitting terminal resonance coil 40), and successfully eliminate the imaginary part of resonance mode characteristic value,
To realize and keep energy transmission efficiency under single-frequency to maximize.
The eigenfrequency of transmitting terminal resonance coil 40 is identical as the eigenfrequency of receiving end resonance coil 50.Art technology
Personnel can be by the circuit design in routine techniques, programming, and being met the requirements (is locked in the resonance mode of system
The eigenfrequency of resonance coil) transmitting terminal off-resonance coil turn.
Aiming at the problem that frequency, which cleaves, influences efficiency, traditional solution is to require the impedance of transmitting terminal and receiving end complete
It is exactly the same, and the frequency (resonance mode) of splitting is found as system operating frequency.The present invention is non-by adjusting transmitting terminal
The mode of resonance coil 30 guarantees that system under each area of space, works near eigen mode, i.e., energy transmission is imitated
Rate maximizes.The present invention can guarantee that working frequency is stablized in a single-frequency by adjusting the off-resonance coil of transmitting terminal,
The complicated circuit topology for avoiding track frequency and switch operating frequency does not need transmitter and receiver while adjusting the best confession of satisfaction
Electrical efficiency can lock the eigen mode of resonance coil, lifting system stability.The present invention makes working frequency exempt to cleave, that is, protects
Card works in coil resonance frequency, solves the unstable technical problem of working frequency existing in the prior art.
Further, receiving end includes receiving end resonance coil 50, receiving end off-resonance coil 60 and receiving terminal circuit 70,
For 50 resonance coupling of receiving end resonance coil in transmitting terminal resonance coil 40, receiving end off-resonance coil 60 is coupled in receiving end resonance
Coil 50, receiving terminal circuit 70 are electrically connected to receiving end off-resonance coil 60.
Fig. 1 be emit the adjustable double resonance formula radio energy transmission system of end-coil entire block diagram, DC input terminal 10 to
Emit 20 inputing power of terminal circuit, inputing power becomes a high frequency ac signal and enter transmitting by emitting terminal circuit 20
Off-resonance coil 30 is held, then transmitting terminal resonance coil 40, subsequent transmitting terminal resonance are coupled by transmitting terminal off-resonance coil 30
Coil 40 and receiving end resonance coil 50 carry out resonance coupling and by electric energy wireless transmission to receiving end resonance coil 50, by connecing
Electric energy is coupled from receiving end resonance coil 50 and is proposed by receiving end off-resonance coil 60, eventually passes through the receiving terminal circuit 70 of receiving end
(such as filter regulator circuit) is used for load equipment 80.The both ends of transmitting terminal circuit 20 are electrically connected in transmitting terminal non-resonance line
The both ends of circle 30, the both ends of receiving terminal circuit 70 are electrically connected in the both ends of receiving end off-resonance coil 60.
Further, transmitting terminal resonance coil 40 and receiving end resonance coil 50 are independent closed circuit.
In the present embodiment, transmitting terminal resonance coil 40 and receiving end resonance coil 50 are only by the coil of coiling and several low
Depletion capacitance is formed in parallel.
Further, 40 magnetic field coupling of transmitting terminal resonance coil is in transmitting terminal off-resonance coil 30；Receiving end resonance line
50 magnetic field couplings are enclosed in receiving end off-resonance coil 60.
In the present embodiment, transmitting terminal resonance coil 40 forms self-closing circuit, and low consumption and high pressure resisting alternating current is only used only
Hold and take suitable coil design, passes through magnetic field coupling between transmitting terminal off-resonance coil 30 and transmitting terminal resonance coil 40
It closes, the Q value of transmitting terminal resonance coil 40 is effectively promoted；Similarly, receiving end resonance coil 50 forms self-closing circuit, only
Using low consumption and high pressure resisting ac capacitor and suitable coil design is taken, receiving end off-resonance coil 60 and receiving end resonance line
By magnetic field coupling between circle 50, the Q value of receiving end resonance coil 50 is effectively promoted；The wireless power transmission designed in this way
System can maximize energy transmission distance.
Further, control module is electrically connected to transmitting terminal off-resonance coil 30.
In the present embodiment, control module is electrically connected to transmitting terminal off-resonance coil 30, according to transmitting terminal off-resonance coil 30
In interlock circuit parameter calculate distance.Distance is the distance between transmitting terminal resonance coil 40 and receiving end resonance coil 50.
Further, control module includes: the detection list for detecting the input current voltage parameter of transmitting terminal circuit 20
First (not shown), detection unit are electrically connected to transmitting terminal circuit 20；Handle input current voltage parameter and according to input electricity
The computing unit (not shown) that voltage parameter calculates distance is flowed, computing unit is electrically connected to detection unit；It is controlled according to distance
The control unit (not shown) of switching module processed, control unit are electrically connected to computing unit and switching module.
Under different distance, it is different with the stiffness of coupling of transmitting terminal resonance coil 40 to be coupled to receive end resonance coil 50.This reality
Example is applied using These characteristics, the input current voltage parameter by monitoring, analyzing transmitting terminal circuit 20 obtains distance, input current
Voltage refers to that DC input terminal 10 is input to the Current Voltage of transmitting terminal circuit 20.Specifically, voltage probe and current probe are located at
At transmitting terminal DC input terminal 10.Invention is not limited thereto, as long as receiving end resonance coil 50 and transmitting terminal resonance can be obtained
The distance between coil 40.
Specifically, by the way that voltage probe and current probe (Hall element or resistance point is arranged in transmitting terminal DC input terminal 10
Pressure), detecting voltage value (Uin) and electric current its (Iin) transmitting terminal bluetooth module (including MCU) is inputed to after decompression；Receiving end DC
The same setting voltage probe of output and current probe, detecting voltage value (Uout) and electric current its (Iout) receiving end is inputed to after decompression
Bluetooth module (includes MCU)；Data are transmitted to transmitting terminal bluetooth module again by receiving end bluetooth module；Transmitting terminal bluetooth module
MCU can calculate energy transmission efficiency η=(UoutIout)/(UinIin)；By switching different transmitting terminal off-resonance coils 30, most
The highest transmitting terminal off-resonance coil 30 of selection energy transmission works afterwards.
Further, transmitting terminal off-resonance coil 30 includes the different multiple subcoils of the number of turns；The first end of switching module
It is electrically connected to transmitting terminal circuit 20, the second end of switching module is switchably electrically connected to a subcoil, the control of switching module
End is electrically connected to control module.
In the present embodiment, the first end of switching module is electrically connected to transmitting terminal circuit 20, and the second end of switching module is electrically connected
The subcoil being connected in transmitting terminal off-resonance coil 30, i.e. transmitting terminal circuit 20 are realized and son by the on-off of switching module
Connecting or disconnecting between coil；The control terminal of switching module is electrically connected to control module and is controlled by control module；Control mould
Block it is selected with apart from corresponding subcoil and control the second end of switching module instantly and be electrically connected to the selected subcoil, reality
The now electrical connection between the subcoil and transmitting terminal circuit 20, makes the subcoil be coupled in transmitting terminal resonance coil 40.Work as distance
When change, control module selects another subcoil and controls the second end switching connection of switching module, guarantees transmitting terminal circuit 20
It is electrically connected to subcoil corresponding with current distance, it is corresponding with current distance to guarantee that transmitting terminal resonance coil 40 is coupled in
Subcoil.In the present embodiment, the diameter of multiple subcoils is identical, and the other influences factor such as material is also constant.Technology of the invention
Means are without being limited thereto, as long as can guarantee that transmitting terminal resonance coil 40 is coupled in subcoil (transmitting corresponding with current distance
Terminal circuit 20 is electrically connected to subcoil corresponding with current distance).
Further, control module is one-chip computer module, and switching module includes controllable type switch.
In the present embodiment, switching module includes the switching device of controllable type；Pass through micro-control unit (MCU) detection, processing
Input current voltage parameter simultaneously obtains distance；MCU is recycled to control driving switch device.In other embodiments, it is opened in signal
In the route for closing (light current), the electronic switch of 5V can be used；In the route of MOS switch (forceful electric power), relay, switch can be used
Switching different coils may need to ensure that route is complete to mos gate pole driving signal and metal-oxide-semiconductor input voltage Simultaneous Switching simultaneously
Switching.
In addition, as shown in connection with fig. 3, the present invention also provides a kind of double resonance formula wireless power transmission methods, comprising steps of
Step S101: a transmitting adjustable double resonance formula radio energy transmission system of end-coil, the transmitting terminal of system are provided
It is electrically connected including transmitting terminal circuit 20, transmitting terminal off-resonance coil 30 and transmitting terminal resonance coil 40, transmitting terminal off-resonance coil 30
It is connected to transmitting terminal circuit 20, transmitting terminal resonance coil 40 is coupled in transmitting terminal off-resonance coil 30；
Step S102: the distance between transmitting terminal and receiving end of system are obtained；
Step S103: adjusting the number of turns of transmitting terminal off-resonance coil 30 according to distance with certain rule, and rule is transmitting terminal
Relationship between the number of turns and distance of off-resonance coil 30 is negatively correlated.
In the present embodiment, the transmitting adjustable double resonance formula radio energy transmission system of end-coil further includes control module and cuts
Block is changed the mold, by controlling switching module regulating winding the number of turns by control module in control module execution step S102, step S103.
Further, in the step of adjusting the number of turns of transmitting terminal off-resonance coil 30 according to distance with certain rule, pass through
The number of turns for adjusting transmitting terminal off-resonance coil 30, makes the resonance mode of system be locked in the intrinsic frequency of transmitting terminal resonance coil 40
Rate.The eigenfrequency of transmitting terminal resonance coil 40 is the eigenfrequency of receiving end resonance coil 50.
Further, transmitting terminal off-resonance coil 30 includes the different multiple subcoils of the number of turns；In step S103, it will correspond to
Transmitting terminal circuit 20 is electrically connected in a subcoil of distance.
Further, distance is the distance between transmitting terminal resonance coil 40 and receiving end resonance coil 50.In conjunction with Fig. 2,
Shown in Fig. 4 a to Fig. 7, in the present embodiment, the transmitting adjustable double resonance formula radio energy transmission system of end-coil includes that transmitting terminal is total
Shake coil 40, transmitting terminal off-resonance coil 30 and receiving end resonance coil 50, receiving end off-resonance coil 60；Transmitting terminal is non-total
The coil 30 that shakes includes the first subcoil 31, the second subcoil 32 and third subcoil 33；Transmitting terminal circuit 20 is electrically connected to first
One of subcoil 31, the second subcoil 32 and third subcoil 33；The signal of transmitting terminal off-resonance coil 30 is flowed through as transmitting
The high frequency ac signal that terminal circuit 20 is formed, working frequency are some single-frequency in 50kHz-10MHz；Receiving end non-resonance line
The output signal of circle 60 is high frequency ac signal, by can after rear end receiving terminal circuit 70 (including rectification circuit and filter circuit)
To use.First subcoil 31, the second subcoil 32 and third subcoil 33 respectively correspond area of space I, II and of area of space
Area of space III, the number of turns of the first subcoil 31 are greater than the number of turns of the second subcoil 32, and the number of turns of the second subcoil 32 is greater than the
The distance of the number of turns of three subcoils 33, area of space I to transmitting terminal is less than distance of the area of space II to transmitting terminal, area of space
II is less than the distance of area of space III to transmitting terminal to the distance of transmitting terminal.
Transmitting terminal resonance coil 40 and the resonant frequency ω having the same of receiving end resonance coil 500, i.e., in the present invention
Working frequency, the frequencies omega050kHz is generally between 10MHz, specific value and the transmitting adjustable double resonance formula of end-coil
The overall dimensions of radio energy transmission system are related to working environment.
Specifically, when receiving end is integrally moved in space, transmitting terminal passes through the transmitting terminal for constantly switching access system
Off-resonance coil 30 realizes unifrequency high efficiency and can move freely electric energy transmission.For example, when receiving end is in compared near space
When region I, system switches to the first more subcoil 31 of number of turns, and as shown in fig. 4 a, system is in eigenfrequency ω at this time0
It is as shown in Figure 4 b to locate working efficiency.It is observed that the first subcoil 31 can provide the unifrequency high efficiency in area of space I
Mobile electric energy transmission.
If mobile receiving end to area of space II, the first subcoil 31 of script will be unable to meet demand, switch at this time
To the second subcoil 32, as shown in Figure 5 a.Coiling the number of turns of second subcoil 32 is less than coiling the number of turns of the first subcoil 31
The relationship of energy transmission efficiency and area of space in the activation of the second subcoil 32 of uniting is as shown in Figure 5 b.Second subcoil 32 can be with
The mobile electric energy transmission of unifrequency high efficiency in area of space II is provided.
If mobile receiving end to area of space III, the second subcoil 32 of script will be unable to meet demand, switch at this time
To third subcoil 33, as shown in Figure 6 a.Coiling the number of turns of third subcoil 33 is less than coiling the number of turns of the second subcoil 32
The relationship of energy transmission efficiency and area of space when third subcoil 33 activates of uniting is as shown in Figure 6 b.Third subcoil 33 can be with
The mobile electric energy transmission of unifrequency high efficiency in area of space III is provided.
To sum up, as shown in fig. 7, the first subcoil 31, the second subcoil 32, third that the program passes through switching transmitting terminal
Coil 33 and 40 coupling operational of transmitting terminal resonance coil, may be implemented a wide range of area of space (area of space I, area of space II
With area of space III) efficient electric energy transmission.Additional, the system of program building realizes single working frequency, can be with
Greatly simplify the transmitting terminal circuit 20 of output high frequency ac signal.The program has weight in radio energy transmission system Project Realization
The meaning wanted.The above is only one embodiment of the invention, subcoil quantity of the invention, the number of turns, applicable area of space etc.
It is not limited with above-described embodiment.
In the prior art, with the increase of distance, energy transmission efficiency is gradually reduced.The present invention is changed by switching coil
The number of turns of transmitting terminal off-resonance coil 30, realizes the magnetic flux of transmitting terminal off-resonance coil 30 and transmitting terminal resonance coil 40
Control realizes stable, efficient energy transmission efficiency in a wide range of；Single-frequency can be used to work for the present invention；This hair
Bright the number of turns by changing transmitting terminal off-resonance coil 30 can guarantee that working frequency does not cleave always and (guarantee to resonate frequently in coil
Rate work).
Present invention could apply to multiple angles (general 0 ° to 60 °), it is more wireless than different to can be applied to area
Under the extreme cases such as charging system can be applied to area coil ratio and differ, space angle etc., and relative position does not align,
Guarantee that energy transmission efficiency is relatively stable in a wide range of space.When practical application, need to be designed according to different application scene
Coil turn.
The present invention realizes the free-moving wireless power transmission of high efficiency under one working frequency, meets wireless
The requirement of electric energy transmission system demand bigger charge power and higher charge efficiency, meets free-moving demand, gram
The difficulty for having taken frequency tracking solves the problems, such as that coil and circuit optimization can not be carried out in the miniature requirement of receiving end.
The present invention changes the distribution in magnetic field by switching transmitting terminal off-resonance coil 30 from physical mechanism, can be effective
Promotion energy efficiency of transmission；The working frequency of system can be stablized in a single-frequency；Bigger fill can be provided
Electric range meets free-moving demand.
The above is only presently preferred embodiments of the present invention, not do limitation in any form to the present invention, although this
Invention has been disclosed in a preferred embodiment above, and however, it is not intended to limit the invention, any person skilled in the art,
In the range of not departing from technical solution of the present invention, when the technology contents using the disclosure above make a little change or are modified to
With the equivalent embodiment of variation, but anything that does not depart from the technical scheme of the invention content, according to the technical essence of the invention to
Any simple modification, equivalent change and modification made by upper embodiment, all of which are still within the scope of the technical scheme of the invention.
It should be noted that this specification structure depicted in this specification institute accompanying drawings, ratio, size etc., only to cooperate
The bright revealed content of book is not intended to limit the invention enforceable limit so that those skilled in the art understands and reads
Fixed condition, therefore do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size, not
It influences still fall in disclosed technology contents under the effect of present invention can be generated and the purpose that can reach and obtain
In the range of capable of covering.
Claims (10)
1. a kind of adjustable double resonance formula radio energy transmission system of transmitting end-coil, the transmitting terminal of the system includes transmitting terminal
Circuit, transmitting terminal off-resonance coil and transmitting terminal resonance coil, the transmitting terminal off-resonance coil are electrically connected to the transmitting terminal
Circuit, the transmitting terminal resonance coil are coupled in the transmitting terminal off-resonance coil, which is characterized in that the transmitting end-coil can
The double resonance formula radio energy transmission system of tune further include:
For obtaining the transmitting terminal of the system and the control module of the distance between receiving end；
Adjust the circle of the transmitting terminal off-resonance coil with certain rule according to the distance under the control of the control module
Several switching modules, the switching module and the control module communicate to connect.
2. the transmitting adjustable double resonance formula radio energy transmission system of end-coil as described in claim 1, it is characterised in that: institute
The relationship stated between the number of turns and the distance that rule is the transmitting terminal off-resonance coil is negatively correlated.
3. the transmitting adjustable double resonance formula radio energy transmission system of end-coil, feature exist as claimed in claim 1 or 2
In: the control module controls the number of turns that the switching module adjusts the transmitting terminal off-resonance coil, so that the system
Resonance mode is locked in the eigenfrequency of the transmitting terminal resonance coil.
4. the transmitting adjustable double resonance formula radio energy transmission system of end-coil as described in claim 1, it is characterised in that: institute
Stating receiving end includes receiving end resonance coil, receiving end off-resonance coil and receiving terminal circuit, and the receiving end resonance coil is total
Vibration is coupled in the transmitting terminal resonance coil, and the receiving end off-resonance coil is coupled in the receiving end resonance coil, described
Receiving terminal circuit is electrically connected to the receiving end off-resonance coil；The transmitting terminal resonance coil magnetic field coupling is in the transmitting terminal
Off-resonance coil；
The receiving end resonance coil magnetic field coupling is in the receiving end off-resonance coil.
5. the transmitting adjustable double resonance formula radio energy transmission system of end-coil as described in claim 1, it is characterised in that: institute
It states control module and is electrically connected to the transmitting terminal off-resonance coil.
6. the transmitting adjustable double resonance formula radio energy transmission system of end-coil as claimed in claim 5, which is characterized in that institute
Stating control module includes:
For detecting the detection unit of the input current voltage parameter of the transmitting terminal circuit, the detection unit is electrically connected to institute
State transmitting terminal circuit；
It handles the input current voltage parameter and calculates the computing unit of the distance according to the input current voltage parameter,
The computing unit is electrically connected to the detection unit；
According to the control unit of switching module described in the distance controlling, described control unit be electrically connected to the computing unit and
The switching module.
7. the transmitting adjustable double resonance formula radio energy transmission system of end-coil as described in claim 1, it is characterised in that: institute
Stating transmitting terminal off-resonance coil includes the different multiple subcoils of the number of turns；
The first end of the switching module is electrically connected to the transmitting terminal circuit, and the second end of the switching module is switchably electric
It is connected to a subcoil, the control terminal of the switching module is electrically connected to the control module.
8. a kind of double resonance formula wireless power transmission method, which is characterized in that comprising steps of
A transmitting adjustable double resonance formula radio energy transmission system of end-coil is provided, the transmitting terminal of the system includes transmitting terminal
Circuit, transmitting terminal off-resonance coil and transmitting terminal resonance coil, the transmitting terminal off-resonance coil are electrically connected to the transmitting terminal
Circuit, the transmitting terminal resonance coil are coupled in the transmitting terminal off-resonance coil；
Obtain the distance between transmitting terminal and the receiving end of the system；
The number of turns of the transmitting terminal off-resonance coil is adjusted with certain rule according to the distance, the rule is the transmitting terminal
Relationship between the number of turns of off-resonance coil and the distance is negatively correlated.
9. double resonance formula wireless power transmission method as claimed in claim 8, which is characterized in that it is described according to the distance with
Certain rule was adjusted in the step of the number of turns of the transmitting terminal off-resonance coil: by adjusting the transmitting terminal off-resonance coil
The number of turns makes the resonance mode of the system be locked in the eigenfrequency of the transmitting terminal resonance coil.
10. double resonance formula wireless power transmission method as claimed in claim 8 or 9, it is characterised in that:
The transmitting terminal off-resonance coil includes the different multiple subcoils of the number of turns；
In described the step of adjusting the number of turns of transmitting terminal off-resonance coil according to the distance with certain rule, it will correspond to described
The subcoil of the one of distance is electrically connected to the transmitting terminal circuit.
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| CN201910006250.9A CN110212653A (en) | 2019-01-04 | 2019-01-04 | Emit the adjustable double resonance formula radio energy transmission system of end-coil and method |
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