CN109462288A - A kind of method and device improving the gain of weak coupling wireless power transmission - Google Patents
A kind of method and device improving the gain of weak coupling wireless power transmission Download PDFInfo
- Publication number
- CN109462288A CN109462288A CN201811129877.5A CN201811129877A CN109462288A CN 109462288 A CN109462288 A CN 109462288A CN 201811129877 A CN201811129877 A CN 201811129877A CN 109462288 A CN109462288 A CN 109462288A
- Authority
- CN
- China
- Prior art keywords
- transmitting coil
- phase
- gain
- transmitting
- wireless power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
Abstract
The present invention provides a kind of method and devices for improving the gain of weak coupling wireless power transmission.Transmitting coil array is formed by the way that multiple transmitting coil elements are arranged in transmitting terminal, each transmitting coil element is separately connected a power amplifier, and adjusts the output impedance of each rate amplifier to the influence of overall power gain according to the coupling between every two transmitting coil element；The phase of each power amplifier is adjusted, and then compensate to the phase of the transmitting coil element of transmitting terminal to the difference of the phase offset between the receiving coil element of receiving end according to each transmitting coil element of transmitting terminal simultaneously.Energy transmission gain is improved, so that radio energy transmission is easier to realize, can be applied on such as handheld mobile device small device.
Description
Technical field
The invention belongs to wireless power transmission power gain technical fields, and in particular to a kind of raising weak coupling radio energy
The method and device of transmission gain.
Background technique
Near-field coupling wireless power transmission be wireless powering device charging major technique, such as wireless radio frequency identification mark,
Sensor and medical implant.The transmission of conventional wireless electric energy uses two coil transmission structures, i.e. one big coil of transmitting terminal
And the small coil in receiving end one, transmitting coil and receiving coil it is symmetrical whether and size constrain radio energy biography
Defeated gain, in addition, the skin effect of high-frequency alternating current also limits the gain effect of conventional wireless electric energy transmission.By it small-sized
Change the wireless power transmission application aspect of equipment by larger bottleneck, miniaturization is answered in Internet of Things and implantable medical device
One new key request.Using the routine techniques based on 900MHz and 2.4GHz, the reality of efficient RF energy transmission
It is now difficult, because larger in these band wavelengths；On the other hand, because equipment is smaller and smaller, by coupling factor it is smaller and
The limitation of working frequency, traditional inductive coupling are very inefficient.
Summary of the invention
It is an object of the invention to overcome the defect of the prior art, a kind of raising weak coupling wireless power transmission increasing is provided
The method and device of benefit, to solve the problems, such as that traditional single transmitting coil wireless power transmission gain is low.
To achieve the above object, the present invention provides a kind of method for improving the gain of weak coupling wireless power transmission:
Multiple transmitting coil elements are set in the transmitting terminal of wireless power transmission and form transmitting coil array, each emission lines
Coil element is separately connected a power amplifier, and according to the coupling between every two transmitting coil element to overall power gain
Influence adjust the output impedance of each rate amplifier；
According to each transmitting coil element of transmitting terminal to the phase offset between the receiving coil element of receiving end not
Together, the phase of each power amplifier is adjusted, and then the phase of the transmitting coil element of transmitting terminal is compensated.
Further, the order and hair of transmitting coil array are preset according to the size of the transmitting terminal of wireless power transmission
The size of ray coil element.
Further, when carrying out phase compensation, a power amplifier is connected every time, simultaneously closes off other power amplifications
Electric current of the device in transmitting coil element, receiving portion detect the phase for receiving signal, and the phase feedback that will receive signal
Phase compensation is carried out to transmitting coil array.
To achieve the above object, the present invention also provides a kind of devices for improving the gain of weak coupling wireless power transmission, comprising:
Transmitting coil array and the power amplifier group outside the transmitting coil array, the transmitting coil array include multiple hairs
Ray coil element, between the transmitting coil element independently of one another, the power amplifier group include multiple power amplifiers, often
A power amplifier is electrically connected with a transmitting coil element, and described device is able to achieve above-mentioned raising weak coupling radio energy and passes
The method of defeated gain.
Further, the arrangement mode of transmitting coil array is rectangular array.
Further, further includes: phase-locked loop frequency synthesizer and phase detectors, phase-locked loop frequency synthesizer respectively with function
Rate amplifier group and phase detectors electrical connection, phase detectors are for measuring basis signal and receive the phase between signal
Potential difference.
Further, further includes: crystal oscillator, crystal oscillator generate reference signal and be supplied to phase detectors.
Further, power amplifier is driven by electric current.
Compared with prior art, the invention has the following advantages:
(1) it changes the single big transmitting coil structure of wireless power transmission transmitting terminal into transmitting coil array, passes through transmission
Network analysis and Electromagnetic Simulation show that transmitting coil array has higher self-resonant frequency and more preferable than single big transmitting coil
Transmission gain；
(2) by the way that the receiving coil element of multiple transmitting coil elements of transmitting terminal and receiving end is carried out independent respectively
Match, so that the energy provided to transmitting coil array is divided into multiple smaller parts, so that wireless power transmission is easier in fact
It is existing, while can apply on the small devices such as such as handheld mobile device；
(3) phase relation between each transmitting coil element and receiving coil element is optimized, is further increased
Wireless power transmission gain.
Detailed description of the invention
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 technical 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 of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the method flow schematic diagram provided in an embodiment of the present invention for improving the gain of weak coupling wireless power transmission；
Fig. 2 is traditional two loop radios energy Transmission system equivalent circuit diagram provided in an embodiment of the present invention；
Fig. 3 is multi-coil radio energy transmission system equivalent circuit diagram provided in an embodiment of the present invention；
Fig. 4 is transmitting coil array schematic diagram provided in an embodiment of the present invention；
Fig. 5 is that the output impedance of the single transmitting coil of the tradition at 200MHz provided in an embodiment of the present invention and receiving end are born
Relationship between load；
Fig. 6 be tradition single transmitting coil input impedance provided in an embodiment of the present invention at 200MHz and output impedance it
Between relationship；
Fig. 7 is the device of the raising weak coupling wireless power transmission gain provided in an embodiment of the present invention at 480MHz
Relationship between output impedance and receiving end load；
Fig. 8 is that one at 480MHz provided in an embodiment of the present invention specifically improves the gain of weak coupling wireless power transmission
Device input impedance and output impedance between relationship；
Fig. 9 is the receiving coil element of the device provided in an embodiment of the present invention for improving the gain of weak coupling wireless power transmission
With the electric current ratio in transmitting coil element.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, the embodiment of the present invention provides a kind of method for improving the gain of weak coupling wireless power transmission, comprising:
S100: multiple transmitting coil elements are set in the transmitting terminal of wireless power transmission and form transmitting coil array, each
Transmitting coil element is separately connected a power amplifier, and according to the coupling between every two transmitting coil element to whole function
Rate gain influences to adjust the output impedance of each rate amplifier.
Transmitting coil array is with the single big transmitting coil main distinction: the every two transmitting coil in transmitting coil array
Coupling between element will lead to the influence to overall power gain.When transmission range is longer, transmitting coil and receiving coil
Between weak coupling, and the coupling between each transmitting coil element in transmitting coil array is relatively strong, transmitting coil array
The energy transmission to intercouple by reduction from transmitting terminal to receiving end between interior transmitting coil element, and transmitting coil array
Inner couplings can be alleviated by biggish power amplifier output resistance, and power amplifier is to the increasing of transmitting coil array
Benefit can be reduced as the output impedance of power amplifier increases, on the other hand, a lesser power amplifier output resistance
Be conducive to more electric energy being transmitted to transmitting coil array from transmitting terminal power amplifier, because transmitting coil array has phase
To lower resistance.So the power amplifier output impedance that will have a compromise, most practical power amplifier output impedance
Standard value be 50 Ω.
In a specific implement scene, as shown in Figures 2 to 4, by the way that traditional wireless power transmission (WPT) is filled
One of the transmitting terminal set is big, and coil becomes transmitting coil array, and it is known from figures that, Port#1 is receiving end, traditional nothing
Only one big transmitting coil of line power transfer passes traditional radio energy such as the transmitting terminal part Port#2 in Fig. 2
The transmitting terminal part Port#2 of defeated device is changed to the transmitting terminal that size of population is the same and is made of n transmitting coil element, such as Fig. 3
Shown, transmitting terminal part is divided into Port#2, Port#3 ..., and Port#n, n are greater than 3, specifically as shown in figure 4, as n=10,
Transmitting coil array is 4 rank square matrixes, and each transmitting coil element is independent opposite to each other, and each transmitting coil element is equipped with one
Open-circuit position (Open-Circuit Position), transmitting coil element is separately connected power amplifier by open-circuit position.
It is passed by the radio energy of the transmitting coil array formed to single big transmitting coil and multiple transmitting coil elements
Defeated system carries out full-wave electromagnetic emulation, and carries out circuit simulation simultaneously, wherein radio energy transmission system spacing is set as
20cm, single big transmitting coil having a size of 9.06cm × 9.06cm, adopt by the transmitting coil array that multiple transmitting coil elements are formed
3 × 3 square array is formed with the transmitting coil component structure of 3cm × 3cm, the gap between each transmitting coil element is
300μm.Metal width in two different transmitting coils is both configured to 1cm, on this basis, studies frequency characteristic to emission lines
The influence of the efficiency of transmission quantization of array is enclosed, as shown in table 1.
Table 1
From table 1 it follows that ceiling capacity transmission gain caused by single big transmitting coil be at 200MHz-
35dB, and the single transmitting coil element ceiling capacity transmission gain in transmitting coil array is the -27dB in 480MHz, it is complete
Whole transmitting coil array ceiling capacity transmission gain is the -20dB in 480MHz.Although the multiple hairs of the ratio of gains of single big coil
The gain for penetrating coil array is three times greater, but the ceiling capacity transmission gain that multiple transmitting coil arrays work at higher frequencies is very
It extremely can be higher than one big coil.
The equivalent circuit of two coils and multi-coil wireless power supply system difference is as shown in Figures 2 and 3.Power amplifier (PA)
For powering for transmitting coil, each power amplifier can be equivalent to a current source isWith a resistance RSIt is in parallel.
Z11……ZnnThe input impedance (including resonant capacitance) of port N, Z are arrived for port 112, Z23... arrive Z3nIt is send-receive coil
Resonance impedance.It is a two-port network for transmitting coil single in Fig. 2, normal equation can be expressed as follows:
Wherein V1, V2, i1And i2It is port voltage electric current.To inductance L1, L2And Ln, there is resistance R1, R2……Rn.By adding
Enter capacitor C1, C2……Cn, resonance improves efficiency, so we have Z11And Z22:
Following formula can be obtained in inductance L1 under the resonance range of receiving end, capacitor CL:
The matched load R of receiving endL=R1, V known to us1=i1×RL, can be replaced with formula (3), obtain following related V1
Expression formula:
Wherein, i2For the electric current of transmitting coil, V1It is the voltage real part of receiving end load resistance.Study two-port network
Gain need to define the energy (P for being transmitted to and receiving loadL) with the energy (P of power amplifierAVS) ratio.
Wherein, isAnd RsIt is the impedance of equivalent current values (peak value) and transmitting terminal respectively.In order to enough to transmitting coil transmission
Energy, capacitor C can be set in we2With the inductance L of transmitting coil2Resonance.In weak coupling, receiving coil part exists
Influence is almost negligible caused by the impedance of transmitting terminal part disregards, and this point can be confirmed in second part, so i2And isRelationship
It can indicate such as:
Formula (6) are substituted into formula (5), can be obtained:
As receiving coil (L1, R1) connection one resonant capacitance CL and matched load RL=R1, electric energy, which is transmitted to, receives load
RLIt can be expressed as (wherein V1It is peak value):
As a result, the electric energy transmission gain of the both ends port system in our available Fig. 2:
It may finally obtain the dual-port energy transmission gain in the case of weak coupling:
Firstly, ignoring intercoupling between transmitting coil element, the n-th circle (n in transmitting coil array can be obtained
The available power of=2,3 ... power amplifier n):
Wherein, inAnd RnIt is the maximum current and resistance that transmitting coil n-th encloses, iS,nAnd RS,nIt is the n-th circle power amplifier
Equivalent current and resistance, the maximum power for being transmitted to receiving coil are represented by (wherein RL=R1):
Then the integral energy transmission gain of the transmitting coil array of N number of unit is obtained:
Due to transmitting coil element all in transmitting coil array be of the same size with uniform power amplifier,
Formula (13) can rewrite are as follows:
Wherein resonance impedance can be expressed as follows, wherein AnAnd ΦnIt is amplitude and phase:
Emulation obtains amplitude An, it is a 3 × 3 multi-thread cycle matrix in view of transmitting coil that receiving coil, which is labeled as Coil#1,
Such as Fig. 2, it is denoted as Coil#2-Coil#10.Be calculated the magnetic field under 1W power around receiving coil with simulation software
Respectively Coil#2-Coil#10.Wherein, magnetic field is maximum close to 8 × 10-3 (A/m).Compare magnetic field to concentrate as a result,
Electric current ratio can be translated into be analyzed, the induced current of receiving coil (Coil#1) is than upper transmitting coil array (Coil#
Ource electric current 2-Coil#10).Receiving coil is respectively with the electric current ratio of nine arrays of transmitting coil as shown in figure 9, magnetic field conditions are several
It is identical.This is because distance is farther out for transmitting coil array for the radio energy transmission system of spacing 20cm.
So can obtain, AnIt is almost consistent:
A2=A3=...=AN+1 (16)
Phase Φn(n=2,3 ... N+1) are mainly determined by coil distribution and open-circuit position, in practical applications, can be by
Tx PA compensates phase to reach maximum gain.Such as Φn,PA=-Φn.In this way, which energy transmission gain can be reduced to formula
(17):
Wherein, Gp,2It is the Two-port netwerk energy transmission gain in (10).Wherein, Gp,2It is the Two-port netwerk energy transmission in (10)
Gain.According to formula (17) it is known that when transmitting coil entirety occupied space is equal in magnitude, the transmitting coil of a n member
The energy transmission gain of array is N times of single transmitting coil energy transmission gain, for example, one 3 × 3 transmitting coil array (N
=9) gain is nine times of an array element.In conjunction with table 1, by shifting working frequency onto 480MHz, can will emit
The energy transmission gain of single transmitting coil element in coil array is increased to the energy transmission increasing than single big transmitting coil
The high 9dB of benefit, then entire transmitting coil array can be further added by additional 9.5dB (being equivalent to nine times), therefore transmitting coil battle array
Column improve energy transmission gain compared to single big transmitting coil in weak coupling wireless power transmission.
According to table 1, in the case where perfect matching, the ceiling capacity transmission gain of single big transmitting coil is-
35dB, it follows that power needed for transmitting coil must be over if the power consumption of receiving end load is 10mW
63W, this is almost impossible to realize in ordinary flat, and this power supply is not suitable for handheld mobile device, such as smart phone yet.Root
According to the theory analysis and table 1 of formula (17), -19.5dB is can be improved in transmission gain.Then, when receiving end, load-receipt is arrived
When 10mW energy, 0.9W is reduced in the energy loss of transmitting terminal.This loss is generated jointly by nine elements in array, is put down
Each element is 0.1W in the loss of transmitting terminal array, this also allows it more feasible in handheld device.
S200: according to each transmitting coil element of transmitting terminal to the phase offset between the receiving coil element of receiving end
Difference, adjust the phase of each power amplifier, and then compensate to the phase of the transmitting coil element of transmitting terminal.
The phase relation of transmitting coil array is optimized, formula (17) realizes the raising of N times of gain.As shown in Fig. 2,
Relative distribution and open-circuit position due to transmitting coil array element, from each transmitting coil element to the phase of receiving coil element
Position offset is different.Therefore, the phase of power amplifier can be obtained maximum energy transmission by compensation.In order to obtain phase shift,
Only one power amplifier is switched on each time, and the electric current of other power amplifiers is closed in transmitting coil array.
Then, receiving portion detection receives the phase of signal, and feeds back to emission array part and carry out phase compensation.In practical realization
In, it needs to provide phase-locked loop frequency synthesizer in emission array part, power amplifier is allowed to select various phases.In receiving unit
Point, a frequency reference benchmark (such as crystal) is needed, phase detectors can be used for measuring basis signal and receive between signal
Phase difference.Then, phase difference returns to transmitting terminal, and transmitting terminal can adjust the phase of each power amplifier according to this.Such as
Central axis of the fruit receiving coil far from multi-coil arrays then needs to rearrange phase relation, and executes identical phase again
Adjustment process.As shown in figure 4, when the receiving coil element of receiving end is moved from the central axis 6 of transmitting coil array to 10,
Δ X and Δ Y increases.When the receiving coil element of receiving end is far from transmitting coil array center axis 2, phase signal is linear
Monotone decreasing.In contrast, when the receiving coil element of receiving end is far from the central axis 10 of transmitting coil array, power
Amplifier phase signal is in polyline shaped.
Further scheme is arranged multiple transmitting coil elements in transmitting terminal and forms transmitting coil array, each emission lines
Coil element is separately connected a power amplifier, and according to the coupling between every two transmitting coil element to overall power gain
Influence output impedance to adjust each rate amplifier before further include:
The order and transmitting coil member of transmitting coil array are preset according to the size of the transmitting terminal of wireless power transmission
The size of part.It follows that optimization is identical as the single big size of transmitting coil, i.e., according to the optimization method of planar coil
The single big transmitting coil of 9.06cm × 9.06cm is changed to 3 × 3 rank transmitting coil arrays of 1cm × 1cm, in transmitting coil array
Gap between each transmitting coil element is 300 μm.
Further scheme connects a power amplifier every time, simultaneously closes off other power when carrying out phase compensation
Electric current of the amplifier in transmitting coil element, receiving portion detect the phase for receiving signal, and the phase that will receive signal
It feeds back transmitting coil array and carries out phase compensation.Based on weak coupling situation, respectively by each transmitting coil element of transmitting terminal
Individually matched with the receiving coil element of receiving end, according to the equivalent circuit in Fig. 3, by all series capacitances respectively with
Coil inductance resonates, and then scan power amplifier output resistance (Tx) and receiving end (Rx) load (R respectivelyL) check
Influencing each other between them.As shown in Fig. 5 to Fig. 8, solid line Real represents the real part of impedance, dotted line Imaginary generation in figure
The imaginary part of table impedance.The influence of the single big transmitting coil of research first, as shown in figure 5, it has maximum gain at 200MHz, it is right
The real part imaginary part of transmitting terminal input impedance is emulated, and receiving end load becomes 1k Ω from 0.1 Ω, and the variation of Tx real part is less than
0.1%, Tx imaginary part are maintained near 0.Vice versa, is illustrated in figure 6 Rx impedance as Tx changes between 01 Ω to 1k Ω
Analog result, wherein change in the real part of receiving port less than 0.1%, imaginary part is close to 0.Secondly, giving in figures 7 and 8
Having gone out the transmitting terminal under 480MHz frequency is the simulation result under transmitting coil array case.The real part variation of Tx and Rx is less than
1%, and imaginary part is held at 0 or so.Therefore it is known that the system of the receiving coil of 1cm × 1cm and spacing 20cm form one
A typical weak coupling case, therefore respectively can individually be matched transmitting coil element with receiving coil element respectively,
And the very little that influences each other caused by weak coupling.
The embodiment of the invention also provides a kind of devices for improving the gain of weak coupling wireless power transmission, comprising: emission lines
Array and the power amplifier group outside the transmitting coil array are enclosed, the transmitting coil array is by multiple transmitting coil members
Part is constituted, and between the transmitting coil element independently of one another, the power amplifier group is made of multiple power amplifiers, each
Power amplifier is electrically connected with a transmitting coil element.The device of the raising weak coupling wireless power transmission gain is able to achieve
State the function of any method for improving the gain of weak coupling wireless power transmission.
Further, the arrangement mode of transmitting coil array is rectangular array.Thus structure is it is found that pass through rectangular array
Wireless power transmission gain can be improved in distribution, experimental verification, and the results are shown in Table 1 for analog simulation.
Further, further includes: phase-locked loop frequency synthesizer and phase detectors, phase-locked loop frequency synthesizer respectively with function
Rate amplifier group and phase detectors electrical connection, phase detectors are for measuring basis signal and receive the phase between signal
Difference.Thus structure detects the phase of receiving end by phase detectors it is found that in specific real-time process, then will inspection
The phase measured passes to phase-locked loop frequency synthesizer, and phase-locked loop frequency synthesizer is adjusted the phase of power amplifier,
And then the phase of transmitting coil element is compensated, improve integral energy transmission gain.
Further, further includes: crystal oscillator, crystal oscillator generate reference signal and be supplied to phase detectors.
In receiving end, a frequency reference benchmark is needed, crystal oscillator can provide this frequency reference benchmark, and then phase is examined
The reception signal of device detection receiving end is surveyed, and is compared to obtain phase difference with reference signal by signal is received, then by phase
Difference returns to transmitting terminal, and transmitting terminal can be according to the phase of each power amplifier of this adjusting offset.
Further, power amplifier is driven by electric current.Thus structure is it is found that the power amplifier of electric current driving is usual
Intercoupling with biggish output resistance, therefore between transmitting coil element will not generate too much influence.
Compared with prior art, the invention has the following advantages:
(1) it changes the single big transmitting coil structure of wireless power transmission transmitting terminal into transmitting coil array, passes through transmission
Network analysis and Electromagnetic Simulation show that transmitting coil array has higher self-resonant frequency and more preferable than single big transmitting coil
Transmission gain；
(2) by the way that the receiving coil element of multiple transmitting coil elements of transmitting terminal and receiving end is carried out independent respectively
Match, so that the energy provided to transmitting coil array is divided into multiple smaller parts, so that wireless power transmission is easier in fact
It is existing, while can apply on the small devices such as such as handheld mobile device；
(3) phase relation between each transmitting coil element and receiving coil element is optimized, is further increased
Wireless power transmission gain.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of method for improving the gain of weak coupling wireless power transmission, it is characterised in that:
S100: multiple transmitting coil elements are set in the transmitting terminal of wireless power transmission and form transmitting coil array, each transmitting
Coil part is separately connected a power amplifier, and is increased according to the coupling between every two transmitting coil element to overall power
Benefit influences to adjust the output impedance of each rate amplifier；
S200: according to each transmitting coil element of transmitting terminal to the phase offset between the receiving coil element of receiving end not
Together, the phase of each power amplifier is adjusted, and then the phase of the transmitting coil element of transmitting terminal is compensated.
2. the method according to claim 1 for improving the gain of weak coupling wireless power transmission, it is characterised in that:
The order and transmitting coil element of transmitting coil array are preset according to the size of the transmitting terminal of wireless power transmission
Size.
3. the method according to claim 1 for improving the gain of weak coupling wireless power transmission, it is characterised in that: carrying out phase
When the compensation of position,
A power amplifier is connected every time, simultaneously closes off electric current of other power amplifiers in transmitting coil element, is received
Part detects the phase for receiving signal, and the phase feedback for receiving signal is carried out phase compensation to transmitting coil array.
4. a kind of device for improving the gain of weak coupling wireless power transmission characterized by comprising transmitting coil array and be located at
Power amplifier group outside the transmitting coil array, the transmitting coil array include multiple transmitting coil elements, the hair
Between ray coil element independently of one another, the power amplifier group includes multiple power amplifiers, each power amplifier and one
A transmitting coil element electrical connection, described device are able to achieve raising weak coupling radio as described in any one of claims 1 to 3
The method of energy transmission gain.
5. the device according to claim 4 for improving the gain of weak coupling wireless power transmission, it is characterised in that: the transmitting
The arrangement mode of coil array is rectangular array.
6. the device according to claim 4 for improving the gain of weak coupling wireless power transmission, which is characterized in that further include lock
Phase ring frequency synthesizer and phase detectors, the phase-locked loop frequency synthesizer respectively with the power amplifier group and the phase
Bit detector electrical connection, the phase detectors are for measuring basis signal and receive the phase difference between signal.
7. the device according to claim 6 for improving the gain of weak coupling wireless power transmission, which is characterized in that further include:
Crystal oscillator, the crystal oscillator generate reference signal and are supplied to the phase detectors.
8. the device according to claim 4 for improving the gain of weak coupling wireless power transmission, it is characterised in that: the power
Amplifier is driven by electric current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811129877.5A CN109462288B (en) | 2018-09-27 | 2018-09-27 | Method and device for improving weak coupling wireless power transmission gain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811129877.5A CN109462288B (en) | 2018-09-27 | 2018-09-27 | Method and device for improving weak coupling wireless power transmission gain |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109462288A true CN109462288A (en) | 2019-03-12 |
| CN109462288B CN109462288B (en) | 2021-03-30 |
Family
ID=65607001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811129877.5A Active CN109462288B (en) | 2018-09-27 | 2018-09-27 | Method and device for improving weak coupling wireless power transmission gain |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109462288B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110040011A (en) * | 2019-04-18 | 2019-07-23 | 浙江吉利控股集团有限公司 | A kind of wireless charging method and control device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664468A (en) * | 2012-05-03 | 2012-09-12 | 东南大学 | Multi-transmission single-receiving wireless energy transmission device |
-
2018
- 2018-09-27 CN CN201811129877.5A patent/CN109462288B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664468A (en) * | 2012-05-03 | 2012-09-12 | 东南大学 | Multi-transmission single-receiving wireless energy transmission device |
Non-Patent Citations (1)
| Title |
|---|
| 曹志强等: "基于相位自适应的双线圈无线能量传输系统设计", 《传感器与微系统》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110040011A (en) * | 2019-04-18 | 2019-07-23 | 浙江吉利控股集团有限公司 | A kind of wireless charging method and control device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109462288B (en) | 2021-03-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10525181B2 (en) | Resonant power transfer system and method of estimating system state | |
| US10383990B2 (en) | Variable capacitor for resonant power transfer systems | |
| US10122222B2 (en) | Magnetic power transmission utilizing phased transmitter coil arrays and phased receiver coil arrays | |
| EP3198677B1 (en) | Antenna designs for communication between a wirelessly powered implant to an external device outside the body | |
| US11239701B2 (en) | Resonant power transfer systems having efficiency optimization based on receiver impedance | |
| CN103199634B (en) | The phased capacitance tuning device of magnet coupled resonant type wireless delivery of electrical energy | |
| CN102918709A (en) | Antenna feeding structure and antenna | |
| KR101142446B1 (en) | wireless power transmission device with a tunable impedance matching circuit | |
| CN109462288A (en) | A kind of method and device improving the gain of weak coupling wireless power transmission | |
| Sah | Design of wireless power transfer system via magnetic resonant coupling at 13.56 MHz | |
| Lin et al. | Omni-directional wireless power transfer systems using discrete magnetic field vector control | |
| EP3506427B1 (en) | Compact antenna device | |
| CN207939267U (en) | Asymmetric coils structure magnetic coupling resonant radio energy Transmission system | |
| CN108900013A (en) | Wireless energy transmission equipment | |
| CN106130091A (en) | A kind of micro radio charger and method of work thereof | |
| KR101360024B1 (en) | Apparatus and method for transmitting wireless power using capacitors | |
| CN107666183B (en) | Series-parallel wireless power transmission system based on feedback resonant power supply | |
| US20190212401A1 (en) | Whole body non-contact electrical stimulation device with variable parameters | |
| EP3139817B1 (en) | Electromagnetic induction radio | |
| Lee et al. | Ultra small dual band antenna design for implantable devices | |
| CN209417276U (en) | A kind of multi-channel radio frequency receiving coil application circuit | |
| CN107666182B (en) | Series-series wireless power transmission system based on feedback resonant power supply | |
| KR20110076609A (en) | Wireless power transfer system using ferrite loading | |
| Wang et al. | Realization of an Optimum Load for Wireless Power Transfer System | |
| CN107733103B (en) | Parallel-parallel wireless power transmission system based on feedback resonant power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |