CN113300493B - Magnetic coupling resonant wireless power transmission system based on electromagnetic metamaterial - Google Patents
Magnetic coupling resonant wireless power transmission system based on electromagnetic metamaterial Download PDFInfo
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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
- H02J50/50—Circuit arrangements or systems for wireless supply or distribution of electric power using additional energy repeaters between transmitting devices and receiving devices
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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
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
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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
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
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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
- H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
Abstract
The application discloses magnetic coupling resonant wireless power transmission system based on electromagnetic metamaterial, which comprises a high-frequency power supply, a first power detection module, a first communication module, a transmitting coil, a metamaterial coupling degree adjusting device, a receiving coil, a second power detection module, a second communication module, a load, an efficiency and power calculation module and a motor control and drive module. The position of the metamaterial coupling degree adjusting structure can be adjusted according to the transmission efficiency and the transmission power, so that the provided magnetic coupling resonant wireless power transmission system based on the electromagnetic metamaterial obtains the maximum transmission efficiency or the maximum transmission power.
Description
Technical Field
The invention relates to the technical field of magnetic coupling resonant wireless power transmission, in particular to a magnetic coupling resonant wireless power transmission system based on an electromagnetic metamaterial.
Background
The magnetic coupling resonance type wireless electric energy transmission system realizes energy transmission between the transmitting coil and the receiving coil through evanescent waves in a coupling near field, has the characteristics of high efficiency, safety and convenience, and is widely concerned at home and abroad. However, when the transmission distance is increased, the transmission efficiency of the system is rapidly reduced, which greatly limits the practical application of the magnetic coupling resonant wireless power transmission. The electromagnetic metamaterial is placed in the magnetic coupling resonant wireless power transmission system, so that the magnetic field distribution among the transmission coils can be effectively improved, the dispersion of magnetic lines of force is reduced, the coupling coefficient among the transmission coils is increased, and the problem that the electromagnetic metamaterial cannot be efficiently transmitted in a long transmission distance is effectively solved. However, the position of the electromagnetic metamaterial in the magnetic coupling resonant wireless power transmission system is very important in application, and when the electromagnetic metamaterial is placed at some positions of the magnetic coupling resonant wireless power transmission system, the electromagnetic metamaterial cannot improve the transmission efficiency and can reduce the transmission efficiency. Generally, the maximum transmission efficiency and the maximum power of wireless power transmission do not occur simultaneously, and the positions of metamaterials in a wireless power transmission system also need to be researched respectively under different requirements.
Disclosure of Invention
Aiming at the technical problems, the invention provides a magnetic coupling resonant wireless power transmission system based on an electromagnetic metamaterial, which can effectively overcome the problem that high-efficiency transmission cannot be realized in a long transmission distance and provides two modes of maximum transmission efficiency and maximum power for wireless power transmission.
In order to realize the functions, the invention provides the following technical scheme.
The magnetic coupling resonant wireless power transmission system based on the electromagnetic metamaterial comprises a high-frequency power supply, a first power detection module, a first communication module, a transmitting coil, a metamaterial coupling degree adjusting device, a receiving coil, a second power detection module, a second communication module, a load, an efficiency and power calculation module and a motor control and drive module;
the output end of the high-frequency power supply is connected with the first power detection module and the transmitting coil;
the first power detection module is respectively connected with the high-frequency power supply and the transmitting coil, measures the numerical values of the voltage and the current of the transmitting end and sends the numerical values to the first communication module;
the first communication module is connected with the first power detection module and wirelessly transmits the voltage and current data acquired by the first power detection module to the efficiency and power calculation module; the transmitting coil is respectively connected with the high-frequency power supply and the first power detection module;
the metamaterial coupling degree adjusting device comprises a metamaterial coupling degree adjusting structure, a sliding track and a motor, wherein the metamaterial coupling degree adjusting structure and a transmitting coil are coaxially arranged and used for converging an alternating magnetic field radiated by the transmitting coil, the sliding track is arranged below the metamaterial coupling degree adjusting structure, the motor is connected with the sliding track, and the metamaterial coupling degree adjusting structure is controlled to move left and right along the sliding track;
the receiving coil is coaxially arranged with the metamaterial coupling degree adjusting structure and is in resonant coupling with the transmitting coil;
the second power detection module is connected with the receiving coil and the load, measures the voltage and current values of the receiving end and sends the measured values to the second communication module;
the second communication module is connected with the second power detection module and wirelessly transmits the voltage and current data acquired by the second power detection module to the efficiency and power calculation module;
the efficiency and power calculation module is connected with the motor control and drive module;
the motor control and drive module is respectively connected with the efficiency and power calculation module and the motor, the motor is controlled to move to the leftmost side of the sliding track during initialization, the motor is controlled to move to the right side by the set minimum moving distance after adjustment is started, and after the mode is selected, the left moving distance sent by the efficiency and power calculation module is received, and the corresponding distance of the left phase of the motor is driven.
Further, the metamaterial unit structure parameters in the metamaterial coupling degree adjusting structure are designed according to the working frequency determined by the coil parameters.
Further, the combined arrangement condition of the metamaterial units in the metamaterial coupling degree adjusting structure is arranged according to the diameter of the transmitting coil or the receiving coil.
Furthermore, the magnetic coupling resonant wireless power transmission structure is a double-coil structure.
Further, the transmitting coil and the receiving coil realize resonance between the two transmission coils through a series resonance capacitor.
Further, the efficiency and power calculation module comprises a communication unit, an efficiency and power calculation unit and a mode selection unit, the built-in communication unit receives data sent by the first communication module and the second communication module, the efficiency and power calculation unit calculates the transmitting end power, the receiving end power and the transmission efficiency of each point after the metamaterial coupling degree is adjusted to structural displacement according to the received data and stores the corresponding moving distance, the receiving end power and the transmission efficiency of each point, the mode selection unit provides maximum transmission efficiency or maximum power adjustment mode selection, after the mode selection, the maximum value and the corresponding moving distance are selected by comparing the data stored in each point with the corresponding efficiency or power, and the left moving distance is calculated and sent to the motor control and driving module.
Further, the control flow of the efficiency and power calculation module and the motor control and drive module comprises the following steps:
the method comprises the following steps: initializing the system, and driving a metamaterial coupling degree adjusting structure to move to the leftmost side of a sliding track by a driving motor to be close to a transmitting coil;
step two: setting the moving distance x1=0, n =0, the minimum moving distance of the metamaterial coupling adjustment structure after the motor rotates is Δ x, and the transmission distance is x;
step three: receiving the voltage current value U at the transmitting end and the receiving end transmitted by the first communication module and the second communication module1、I1、U2、I2；
Step four: for transmitting end power P at the position1Receiving end power P2The transmission efficiency eta is calculated by the formula P1＝U1I1，P2＝U2I2，η＝P2/P1(ii) a Step five: respectively store the moving distance x1Receiving end power P2The numerical value of the transmission efficiency η;
step six: determining the sum x of the moving distances1If the difference is larger than delta x, the driving motor rotates to drive the metamaterial coupling degree adjusting structure to move delta x to the right side, n = n +1 is achieved, and the moving distance x is achieved1= nxdeltax, and return to step four;
step seven: if the sum of the moving distances x1If the transmission distance x is equal to or less than delta x, entering a mode selection state, and selecting a maximum transmission efficiency mode or a maximum power mode respectively;
step eight: selecting a maximum power mode, and comparing the stored receiving end power P of each displacement point2Selecting the receiving end power P2And its corresponding moving distance x1The drive motor rotates to drive the metamaterial coupling degree adjusting structure to move to the left (x-x)1) The maximum power mode adjustment is finished;
step nine: selecting the maximum transmission efficiency mode, comparing the transmission efficiency eta of each shift point, selecting the maximum transmission efficiency eta and the corresponding moving distance x1The drive motor rotates to drive the metamaterial coupling degree adjusting structure to move to the left (x-x)1) The maximum transmission efficiency mode adjustment ends.
Compared with the prior art, the invention has the following characteristics:
1. the invention can ensure that the provided magnetic coupling resonant wireless power transmission system based on the electromagnetic metamaterial can obtain the maximum transmission efficiency or the maximum power to be transmitted according to the selected maximum transmission efficiency mode or the maximum power mode.
2. According to the metamaterial unit structure, the structural parameters are set according to the coil parameters, the combined arrangement of the units is determined according to the diameters of the transmitting coil and the receiving coil, the maximum transmission efficiency or the maximum transmission power of a system under different metamaterial coupling degree adjusting structures can be obtained, and the problem that high-efficiency transmission cannot be achieved within a long transmission distance can be effectively solved.
Drawings
Fig. 1 is a schematic structural diagram of a magnetic coupling resonant wireless power transmission system based on an electromagnetic metamaterial according to the present invention;
FIG. 2 is a Swiss annular metamaterial unit structure with a permeability of-1 in accordance with the present invention;
FIG. 3 is a 3 × 3 single board combination arrangement of the unit structure of the present invention;
FIG. 4 is a flow chart of the efficiency and power calculation module and the motor control and drive module control of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings in conjunction with specific examples.
Referring to fig. 1, the magnetic coupling resonant wireless power transmission system based on the electromagnetic metamaterial includes a high-frequency power supply 1, a first power detection module 2, a first communication module 3, a transmitting coil 4, a metamaterial coupling degree adjusting device 5, a receiving coil 6, a second power detection module 7, a second communication module 8, a load 9, an efficiency and power calculation module 10, and a motor control and drive module 11.
The high-frequency power supply 1 is used for generating a frequency f0The output end of the power supply signal with the power of p is connected with the first power detection module 2 and the transmitting coil 4;
the high-frequency power supply 1 can adjust the generated working frequency and power according to the requirement;
the first power detection module 2 is connected in parallel to a connecting line of the high-frequency power supply 1 and the transmitting coil 4, measures the numerical values of the voltage and the current of the transmitting end and sends the numerical values to the first communication module 3;
the first communication module 3 is connected with the first power detection module 2 and wirelessly transmits the voltage and current data acquired by the first power detection module 2 to the efficiency and power calculation module 10;
the transmitting coil 4 is respectively connected with the high-frequency power supply 1 and the first power detection module 2, an alternating electromagnetic field is generated by induction, the metamaterial coupling degree adjusting structure 51 focuses the alternating electromagnetic field, and the frequency f is generated by adjusting the capacitance value of a connected capacitor0The transmitting coil 6 is connected with an adjusting capacitor according to the power supply frequency to realize coil resonance;
the metamaterial coupling degree adjusting device 5 comprises a metamaterial coupling degree adjusting structure 51, a sliding rail 52 and a motor 53, wherein the metamaterial coupling degree adjusting structure 51 and the transmitting coil 4 are coaxially arranged and used for converging an alternating magnetic field radiated by the transmitting coil 4, the sliding rail 52 is arranged below the metamaterial coupling degree adjusting structure 51, and the motor 53 is connected with the sliding rail 52 and used for controlling the metamaterial coupling degree adjusting structure 51 to move left and right along the sliding rail 52;
resonant frequency f of metamaterial unit of metamaterial coupling degree adjusting structure 51 determined according to coil parameters0Designing;
specifically, as shown in fig. 2, the metamaterial unit of the swiss ring structure with the magnetic permeability μ = -1 is designed to have the magnetic permeability of-1 at the frequency f 0;
the metamaterial coupling degree adjusting structure 51 is expanded to a required size by a metamaterial unit according to the diameters of the transmitting coil 4 and the receiving coil 6;
specifically, the negative magnetic metamaterial units are arranged in an n × n manner to form a single-plate structure, the diameter of the single-plate structure is greater than or equal to the diameter of the transmitting coil 4, and as shown in fig. 3, the single-plate structure is a 3 × 3 single-plate arrangement;
the length of the sliding track is consistent with the transmission distance x between the transmitting coil 4 and the receiving coil 6, and the metamaterial coupling degree adjusting structure can move from the left side to the right side along the sliding track;
the receiving coil 6 is coaxially arranged with the metamaterial coupling degree adjusting structure 51, adopts the same structural parameters as the transmitting coil 4, and couples the electromagnetic field adjusted by the metamaterial coupling degree adjusting structure to generate alternating current;
the second power detection module 7 is connected with the receiving coil 6 and the load 9, measures the voltage and current values of the receiving end and sends the measured values to the second communication module 8;
the second communication module 8 is connected with the second power detection module 7 and wirelessly transmits the voltage and current data acquired by the second power detection module 7 to the efficiency and power calculation module 10;
the receiving coil 6 is connected with the adjusting capacitor according to the resonance frequency to realize resonance with the transmitting coil 4;
the efficiency and power calculation module 10 is connected with the motor control and drive module 11 and comprises a communication unit 101, an efficiency and power calculation unit 102 and a mode selection unit 103, the built-in communication unit 101 receives data sent by the first communication module 3 and the second communication module 8, the efficiency and power calculation unit 102 calculates the transmitting end power, the receiving end power and the transmission efficiency of each point after the metamaterial coupling degree is adjusted to structure displacement according to the received data and stores the corresponding moving distance, the receiving end power and the transmission efficiency of each point, the mode selection unit 103 provides maximum transmission efficiency or maximum power adjustment mode selection, after the mode selection, each point of corresponding efficiency or power is compared to store data, the maximum value and the corresponding moving distance are selected, and the left moving distance is calculated and sent to the motor control and drive module 11;
the motor control and drive module 11 is respectively connected with the efficiency and power calculation module 10 and the motor 53, the control motor 53 moves to the leftmost side of the sliding track during initialization, after adjustment starts, the control motor 53 moves to the right side by a set minimum moving distance, and after mode selection, the receiving efficiency and the left moving distance sent by the power calculation module 10 drive the motor 53 by a corresponding distance.
The control flow chart of the efficiency and power calculating module 10 and the motor control and driving module 11 is shown in fig. 4:
the method comprises the following steps: initializing the system, and driving a metamaterial coupling degree adjusting structure to move to the leftmost side of a sliding track by a driving motor to be close to a transmitting coil;
step two: setting a movement distance x1=0, n =0, the minimum moving distance of the metamaterial coupling adjustment structure after the motor rotates is Δ x, and the transmission distance is x;
step three: receiving the voltage current value U of the transmitting terminal and the receiving terminal transmitted by the first communication module and the second communication module1、I1、U2、I2；
Step four: for transmitting end power P at the position1Receiving end power P2The transmission efficiency eta is calculated by the formula P1＝U1I1，P2＝U2I2，η＝P2/P1；
Step five: respectively store the moving distance x1Receiving end power P2The numerical value of the transmission efficiency η;
step six: determining the sum x of the moving distances1If the difference is smaller than the transmission distance x, continuously judging whether the difference between the transmission distance and the moving distance is larger than delta x, if so, driving the motor to rotate to drive the metamaterial coupling degree adjusting structure to move delta x to the right side, enabling n = n +1, enabling the moving distance x1= n × delta x, and returning to the fourth step;
step seven: if the distance of movementAnd x1If the transmission distance x is equal to or less than delta x, entering a mode selection state, and selecting a maximum transmission efficiency mode or a maximum power mode respectively;
step eight: selecting a maximum power mode, and comparing the stored receiving end power P of each shift point2Selecting the receiving end power P2And its corresponding moving distance x1The drive motor rotates to drive the metamaterial coupling degree adjusting structure to move to the left (x-x)1) The maximum power mode adjustment is finished;
step nine: selecting the maximum transmission efficiency mode, comparing the transmission efficiency eta of each displacement point, selecting the maximum transmission efficiency eta and the corresponding moving distance x1The drive motor rotates to drive the metamaterial coupling degree adjusting structure to move to the left (x-x)1) The maximum transmission efficiency mode adjustment ends.
According to the invention, the provided magnetic coupling resonant wireless power transmission system based on the electromagnetic metamaterial can obtain the maximum transmission efficiency or the maximum power for transmission according to the selected maximum transmission efficiency mode or the selected maximum power mode.
According to the metamaterial unit structure, the structural parameters are set according to the coil parameters, the combined arrangement of the units is determined according to the diameters of the transmitting coil and the receiving coil, the maximum transmission efficiency or the maximum transmission power of a system under different metamaterial coupling degree adjusting structures can be obtained, and the problem that high-efficiency transmission cannot be achieved within a long transmission distance can be effectively solved.
It should be noted that, although the above-mentioned embodiments of the present invention are illustrative, the present invention is not limited thereto, and therefore, the present invention is not limited to the above-mentioned specific embodiments. Other embodiments, which can be devised by those skilled in the art in light of the teachings of the present invention, are considered to be within the scope of the present invention without departing from its principles.
Claims (7)
1. The magnetic coupling resonant wireless power transmission system based on the electromagnetic metamaterial is characterized by comprising a high-frequency power supply (1), a first power detection module (2), a first communication module (3), a transmitting coil (4), a metamaterial coupling degree adjusting device (5), a receiving coil (6), a second power detection module (7), a second communication module (8), a load (9), an efficiency and power calculation module (10) and a motor control and drive module (11);
the output end of the high-frequency power supply (1) is connected with the first power detection module (2) and the transmitting coil (4);
the first power detection module (2) is respectively connected with the high-frequency power supply (1) and the transmitting coil (4), measures the numerical values of the voltage and the current of the transmitting end and sends the numerical values to the first communication module (3);
the first communication module (3) is connected with the first power detection module (2) and wirelessly transmits the voltage and current data acquired by the first power detection module (2) to the efficiency and power calculation module (10);
the transmitting coil (4) is respectively connected with the high-frequency power supply (1) and the first power detection module (2);
the metamaterial coupling degree adjusting device (5) comprises a metamaterial coupling degree adjusting structure (51), a sliding track (52) and a motor (53), wherein the metamaterial coupling degree adjusting structure (51) and the transmitting coil (4) are coaxially arranged to converge an alternating magnetic field radiated by the transmitting coil (4), the sliding track (52) is arranged below the metamaterial coupling degree adjusting structure, the motor (53) is connected with the sliding track (52), and the metamaterial coupling degree adjusting structure (51) is controlled to move left and right along the sliding track (52);
the receiving coil (6) is coaxially arranged with the metamaterial coupling degree adjusting structure (51) and is in resonant coupling with the transmitting coil (4);
the second power detection module (7) is connected with the receiving coil (6) and the load (9), measures the voltage and current values of the receiving end and sends the measured voltage and current values to the second communication module (8);
the second communication module (8) is connected with the second power detection module (7) and wirelessly transmits the voltage and current data acquired by the second power detection module (7) to the efficiency and power calculation module (10); the efficiency and power calculation module (10) is connected with the motor control and drive module (11);
the motor control and drive module (11) is respectively connected with the efficiency and power calculation module (10) and the motor (53), the motor (53) is controlled to move to the leftmost side of the sliding track during initialization, the motor (53) is controlled to move to the right side by the set minimum moving distance after adjustment is started, the left moving distance sent by the efficiency and power calculation module (10) is received after the maximum transmission efficiency mode or the maximum power mode is selected, and the motor (53) is driven to move to the left by the corresponding distance.
2. A magnetic coupling resonant wireless power transmission system based on an electromagnetic metamaterial according to claim 1, wherein the metamaterial unit structure parameters in the metamaterial coupling degree adjustment structure are designed according to the operating frequency determined by the coil parameters.
3. A magnetic coupling resonant wireless power transmission system based on electromagnetic metamaterials as claimed in claim 1, wherein the combined arrangement of the metamaterial units in the metamaterial coupling degree adjustment structure is arranged according to the diameter of the transmitter coil or the receiver coil.
4. A magnetic coupling resonant wireless power transmission system based on electromagnetic metamaterials as claimed in claim 1, wherein the magnetic coupling resonant wireless power transmission structure is a double coil structure.
5. A magnetic coupling resonance type wireless power transmission system based on electromagnetic metamaterial according to claim 1, wherein the transmitting coil (4) and the receiving coil (6) realize resonance between the two transmitting coils through a series resonance capacitor.
6. The electromagnetic metamaterial-based magnetic coupling resonant wireless power transmission system according to claim 1, wherein the efficiency and power calculation module (10) comprises a communication unit (101), an efficiency and power calculation unit (102) and a mode selection unit (103), the built-in communication unit (101) receives data sent by the first communication module (3) and the second communication module (8), the efficiency and power calculation unit (102) calculates the transmitting end power, the receiving end power and the transmission efficiency of each point after the metamaterial coupling degree adjustment structure (51) is displaced according to the received data and stores the corresponding moving distance, the receiving end power and the transmission efficiency, the mode selection unit (103) provides maximum transmission efficiency or maximum power adjustment mode selection, after the mode selection, the maximum value and the corresponding moving distance are selected by comparing the data stored at each point of the corresponding efficiency or power, and the left moving distance is calculated and sent to the motor control and driving module (11).
7. The magnetic coupling resonant wireless power transmission system based on the electromagnetic metamaterial according to claim 1, wherein the control flow of the efficiency and power calculation module (10) and the motor control and drive module (11) comprises the following steps:
(1) Initializing a system, and driving a metamaterial coupling degree adjusting structure (51) to move to the leftmost side of a sliding track (52) by a driving motor (53) to be close to a transmitting coil;
(2) Setting a movement distance x1=0, n =0, the minimum moving distance of the metamaterial coupling adjustment structure after the motor rotates is x, and the transmission distance is x;
(3) Receiving the voltage and current values U of the transmitting end and the receiving end sent by the first communication module (3) and the second communication module (8)1、I1、U2、I2；
(4) For the transmitting end power P at the moment1Receiving end power P2The transmission efficiency eta is calculated by the formula P1=U1I1，P2=U2I2，η=P2/P1;
(5) Respectively store the moving distance x1Is connected toReceive end power P2The numerical value of the transmission efficiency η;
(6) Determining the sum x of the moving distances1If the distance is less than the transmission distance x, continuously judging whether the difference between the transmission distance and the moving distance is greater than x, if so, driving the motor to rotate, driving the metamaterial coupling degree adjustment structure to move to the right side by x, making n = n +1, and moving by the distance x1Δ x, and return to step (4);
(7) If the sum of the moving distances x1When the transmission distance x is equal to or the difference between the transmission distance and the moving distance is less than Δ x, entering a mode selection state, and selecting a maximum transmission efficiency mode or a maximum power mode respectively;
(8) Selecting a maximum power mode, and comparing the stored receiving end power P of each shift point2Selecting the receiving end power P2And its corresponding moving distance x1The drive motor rotates to drive the metamaterial coupling degree adjusting structure to move to the left (x-x)1) The maximum power mode adjustment is finished;
(9) Selecting the maximum transmission efficiency mode, comparing the transmission efficiency eta of each displacement point, selecting the maximum transmission efficiency eta and the corresponding moving distance x1The driving motor rotates to drive the metamaterial coupling degree adjusting structure to move to the left (x-x)1) The maximum transmission efficiency mode adjustment ends.
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| CN113300493A (en) | 2021-08-24 |
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