CN110635581A - Foldable receiving and transmitting antenna of magnetic resonance coupling wireless power transmission system - Google Patents
Foldable receiving and transmitting antenna of magnetic resonance coupling wireless power transmission system Download PDFInfo
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- CN110635581A CN110635581A CN201911034371.0A CN201911034371A CN110635581A CN 110635581 A CN110635581 A CN 110635581A CN 201911034371 A CN201911034371 A CN 201911034371A CN 110635581 A CN110635581 A CN 110635581A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
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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
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
- H02J50/23—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
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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
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
- H02J50/27—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of receiving antennas, e.g. rectennas
Abstract
The invention discloses a foldable receiving and transmitting antenna of a magnetic resonance coupling wireless power transmission system, which comprises a transmitting module for transmitting wireless power and a receiving module for receiving the wireless power. The emission module is of a flat plate type structure and comprises a first dielectric substrate and a second dielectric substrate which are connected through a flexible flat cable, and the included angle between the first dielectric substrate and the second dielectric substrate is 0 degree, 90 degrees, 150 degrees or 180 degrees. The receiving module is of a flat plate type structure, the front surface of the receiving module is provided with a receiving resonant antenna, and the back surface of the receiving module is provided with a parasitic resonant antenna. The invention realizes stable and efficient wireless power transmission, and the relative position and relative angle of the transceiver module can be changed to a certain extent, thereby realizing multi-scene application.
Description
Technical Field
The invention belongs to the field of wireless power transmission, and particularly relates to a foldable receiving and transmitting antenna of a magnetic resonance coupling wireless power transmission system.
Background
With the continuous development of electronic information technology and automation control technology, various home appliances, consumer electronics, mobile communication devices, etc. have been widely popularized, however, the conventional home appliances rely on the wired connection between the power line and the power socket to supply power, and the electronic devices using the built-in battery also need the wired connection between the charging wire and the power socket to charge, so we can see the wires for supplying power to the electronic devices everywhere. The wires not only occupy the activity space of people and limit the convenience of equipment use, but also create the hidden danger of safe electricity utilization. Therefore, with the increasing demand of people for portable devices and green energy systems that can be used completely wirelessly, research and application of wireless energy transmission technology is rapidly becoming the focus of academic and industrial circles at home and abroad. Currently, wireless charging technologies recognized in the industry are mainly classified into three types, one is the QI standard mainly pushed by the WPC alliance and is also called as a magnetic induction coupling technology, the other is a magnetic resonance coupling technology mainly pushed by the Airfuel alliance and is also an electromagnetic radiation type wireless energy transmission technology. Compared with a magnetic induction technology, the magnetic resonance coupling technology has obvious advantages in charging distance, spatial degree of freedom, one-to-many charging and power expansion; compared with the electromagnetic radiation type wireless energy transmission technology, the magnetic resonance coupling technology has more practical application value in the aspects of energy conversion efficiency, transmission power and electromagnetic safety. At present, this technique has been applied to equipment such as intelligence wearing, robot, AGV of sweeping floor gradually, gives the wireless function of charging of equipment to improve equipment's security and intelligent degree, promote user's use and experience. In addition, the application of the magnetic resonance coupling technology in the field of smart home will also subvert the use modes of traditional household appliances, mobile communication equipment and consumer electronics, a residence is used as a platform, all power lines in a home living area are thoroughly removed by utilizing a magnetic resonance wireless charging technology, a hidden wiring technology and an automatic control technology, wireless charging or continuous electric energy supply is carried out on the equipment, the safety, the convenience and the comfort of home are improved, and a high-efficiency, environment-friendly and energy-saving living environment is constructed.
Disclosure of Invention
The invention provides a foldable receiving and transmitting antenna of a magnetic resonance coupling wireless power transmission system, which realizes stable and efficient wireless power transmission.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that: a foldable receiving and transmitting antenna of a magnetic resonance coupling wireless power transmission system comprises a transmitting module for transmitting wireless power and a receiving module for receiving the wireless power;
the transmitting module is of a flat plate type structure and comprises a first dielectric substrate and a second dielectric substrate which are connected through a flexible flat cable, and the included angle between the first dielectric substrate and the second dielectric substrate is 0 degree, 90 degrees, 150 degrees or 180 degrees;
the receiving module is of a flat plate type structure, the front surface of the receiving module is provided with a receiving resonant antenna, and the back surface of the receiving module is provided with a parasitic resonant antenna.
The invention has the beneficial effects that: the utility model provides a folding magnetic resonance coupling wireless power transmission system's receiving and dispatching antenna structure, through changing the contained angle of first medium base plate and second medium base plate, has realized that receiving module can all charge in different distances, different angles and different positions in the transmitting antenna region, can satisfy simultaneously for the wireless charging and the power supply requirement of a plurality of electronic equipment. The transceiver module provided by the invention realizes miniaturization and integration, and greatly reduces the economic cost.
Preferably, the first dielectric substrate includes 2 layers of printed circuits, the first layer of printed circuit is a first transmit resonant antenna, and the second layer of printed circuit is a first microstrip line; the first transmitting resonant antenna comprises a first coil and a second coil which are arranged from outside to inside, and a first connecting point is arranged on the second coil; one end of the first microstrip line is provided with a second connection point, and the other end of the first microstrip line is connected with the second dielectric substrate through a flexible flat cable; the first connecting point is connected with the second connecting point through a through hole, and the first medium substrate is wound in a spiral winding mode;
the first coil and the second coil are both single-turn coils made of microstrip lines.
The beneficial effects of adopting the above preferred scheme are: the first dielectric substrate of the invention adopts the plane printed circuit board to process the antenna structure of the transceiver module, realizes the miniaturization and integration of the transceiver antenna, and has lower production, installation and maintenance costs of the transceiver antenna. The design of the first dielectric substrate ensures that the transmission efficiency is relatively stable when the receiving antenna and the transmitting antenna perform transverse relative motion.
The beneficial effects of adopting the above preferred scheme are:
preferably, the geometric parameters of the first dielectric substrate are set as follows:
the width W of the microstrip line in the first transmission resonant antennaTx1Is 4mm-8 mm;
a space S between adjacent microstrip lines in the first transmission resonant antennaTx1Is 1mm-3 mm;
length L of the first dielectric substrateTx1Is 180mm-240 mm;
the width H of the first dielectric substrateTx1Is 95mm-135 mm;
an outer length L of the first coilTx1_ResIs 180mm-240 mm;
an outer width H of the first coilTx1_ResIs 95mm-135 mm;
the width W of the first microstrip lineTx2Is 4mm-8 mm.
The beneficial effects of adopting the above preferred scheme are: through the setting of the geometric parameters of the first dielectric substrate, the effective transmitting area and the effective chargeable area of the transmitting module are ensured, and the miniaturization and the integration are realized while the coupling strength between the transmitting module and the receiving module is ensured.
Preferably, the second dielectric substrate comprises 2 layers of printed circuits, the first layer of printed circuit is a rectangular spiral annular second transmitting resonant antenna with a notch, and the second layer of printed circuit is a rectangular microstrip line coil with a notch; the second transmitting resonant antenna comprises a third coil, a fourth coil and a fifth coil which are arranged from outside to inside, wherein an electromagnetic energy input port is arranged on the third coil, and a third connection point is arranged on the fifth coil; one end of the microstrip line coil is provided with a fourth connection point, and the other end of the microstrip line coil is connected with the first dielectric substrate through a flexible flat cable; the third connecting point is connected with the fourth connecting point through a through hole; the winding mode of the second dielectric substrate is that the first layer and the second layer are wound in a crossed mode;
the third coil, the fourth coil and the fifth coil are all single-turn coils made of microstrip lines.
The beneficial effects of adopting the above preferred scheme are: the second dielectric substrate of the invention adopts the plane printed circuit board to process the antenna structure of the transceiver module, realizes the miniaturization and integration of the transceiver antenna, and has lower production, installation and maintenance costs of the transceiver antenna. The design of the second dielectric substrate ensures that the transmission efficiency is relatively stable when the receiving antenna and the transmitting antenna perform transverse relative motion.
Preferably, the geometric parameters of the second dielectric substrate are set as follows:
width W of microstrip line in the second transmission resonant antennaTx3Is 4mm-8 mm;
the distance S between adjacent microstrip lines in the second transmitting resonant antennaTx22mm-4 mm;
length L of the second dielectric substrateTx2Is 180mm-240 mm;
width H of the second dielectric substrateTx2Is 95mm-135 mm;
an outer length L of the third coilTx2_ResIs 180mm-240 mm;
an outer width H of the third coilTx2_ResIs 95mm-135 mm;
the width W of the microstrip line in the microstrip line coilTx4Is 4mm-8 mm;
the external length L of the microstrip line coilTx3_Res170mm-230 mm;
the microstripOuter width H of wire coilTx3_ResIs 87mm-127 mm.
The beneficial effects of adopting the above preferred scheme are: through the setting of the geometric parameters of the second dielectric substrate, the effective transmitting area and the effective chargeable area of the transmitting module are ensured, and the miniaturization and the integration are realized while the coupling strength between the transmitting module and the receiving module is ensured.
Preferably, the receiving resonant antenna is a rectangular spiral annular coil, and comprises a sixth coil and a seventh coil which are arranged from outside to inside, the sixth coil is provided with a fifth connection point, and the seventh coil is provided with a sixth connection point; the parasitic resonant antenna is a rectangular spiral annular coil and comprises an eighth coil and a ninth coil which are arranged from outside to inside, a seventh connecting point is arranged on the eighth coil, and an eighth connecting point is arranged on the ninth coil;
the fifth connecting point is connected with a seventh connecting point through a through hole, and the sixth connecting point is connected with an eighth connecting point through a through hole;
and the sixth coil, the seventh coil, the eighth coil and the ninth coil are all single-turn coils made of microstrip lines.
The beneficial effects of adopting the above preferred scheme are: the transmitting module improves the transmission efficiency and increases the transmission distance by arranging the receiving resonant antenna and the parasitic resonant antenna of the rectangular spiral annular coil.
Preferably, the geometric parameters of the receiving module are set as follows:
the microstrip line width W of the receiving resonant antennaRx1Is 4mm-7 mm;
the distance S between adjacent microstrip lines in the receiving resonant antennaRx1Is 1mm-3 mm;
length L of the receiving moduleRx1Is 120mm-150 mm;
width H of the receiving moduleRx1Is 70mm-80 mm;
an outer length L of the sixth coilRx1_ResIs 120mm-150 mm;
an outer width of the sixth coilDegree HRx1_ResIs 70mm-80 mm;
the width W of the microstrip line of the parasitic resonant antennaRx2Is 4mm-7 mm;
the distance S between adjacent microstrip lines in the parasitic resonant antennaRx2Is 1mm-3 mm;
an outer length L of the eighth coilRx2_ResIs 120mm-150 mm;
an outer width H of the eighth coilRx2_ResIs 70mm-80 mm.
The beneficial effects of adopting the above preferred scheme are: by setting the geometric parameters of the receiving module, the transmission efficiency and the coupling strength are ensured, and meanwhile, the miniaturization and the integration are realized.
Preferably, the corners of the coils of the transmitting module and the receiving module are smooth circular arc structures.
The beneficial effects of adopting the above preferred scheme are: the edges and corners of the antenna structure are subjected to smoothing treatment, so that the loss resistance of the antenna is reduced, and the quality factor of the antenna and the wireless energy transmission efficiency of a system are improved.
Drawings
FIG. 1 is a schematic diagram of a first layer of printed circuitry of a first dielectric substrate according to the present invention.
FIG. 2 is a schematic diagram of a second layer of printed circuitry of the first dielectric substrate of the present invention.
FIG. 3 is a schematic diagram of a first layer printed circuit of a second dielectric substrate according to the present invention.
FIG. 4 is a schematic diagram of a second layer printed circuit of the second dielectric substrate of the present invention.
Fig. 5 is a schematic front view of a receiving module according to the present invention.
FIG. 6 is a schematic diagram of a backside structure of a first dielectric substrate according to the present invention.
Fig. 7 is an overall schematic view of a transceiver module when an included angle between a first dielectric substrate and a second dielectric substrate in the transmitter module is 0 °.
Fig. 8 is a graph of transmission efficiency when the included angle between the first dielectric substrate and the second dielectric substrate is 0 °.
Fig. 9 is a schematic view of the whole transceiver module when an included angle between the first dielectric substrate and the second dielectric substrate is [90 °,150 ° ].
Fig. 10 is a graph of transmission efficiency of the transmitting module and the receiving module of the present invention at different distances.
Fig. 11 is a graph of transmission efficiency at different angles for a 7cm distance between the transmit and receive modules of the present invention.
Fig. 12 is a graph of transmission efficiency when the first dielectric substrate and the second dielectric substrate included an angle of [90 °,150 ° ], according to the present invention.
Fig. 13 is an overall schematic view of a transceiver module when an included angle between a first dielectric substrate and a second dielectric substrate in the transmitter module of the invention is 180 °.
Fig. 14 is a graph of transmission efficiency when the included angle between the first dielectric substrate and the second dielectric substrate is 180 °.
Wherein: 101-a first dielectric substrate, 102-a flexible flat cable, 103-a second dielectric substrate, 104-a receiving module, 1011-a first coil, 1012-a second coil, 1013-a first connection point, 1014-a second connection point, 1015-a first microstrip line, 1031-a third coil, 1032-a fourth coil, 1033-a fifth coil, 1034-an electromagnetic energy input port, 1035-a third connection point, 1036-a fourth connection point, 1037-a microstrip line coil, 1041-a sixth coil, 1042-a seventh coil, 1043-a fifth connection point, 1044-a sixth connection point, 1045-a seventh connection point, 1046-an eighth connection point, 1047-an eighth coil and 1048-a ninth coil.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
A foldable receiving and transmitting antenna of a magnetic resonance coupling wireless power transmission system comprises a transmitting module for wireless power transmission and a receiving module 104 for wireless power reception;
the emission module is of a flat plate type structure and comprises a first dielectric substrate 101 and a second dielectric substrate 103 which are connected through a flexible flat cable 102, and the included angle between the first dielectric substrate 101 and the second dielectric substrate 103 is 0 degree, 90 degrees, 150 degrees or 180 degrees;
the receiving module 104 is a plate structure, and has a receiving resonant antenna on the front side and a parasitic resonant antenna on the back side.
The first dielectric substrate 101 includes 2 layers of printed circuits, the first layer of printed circuit is a first transmit resonant antenna, and the second layer of printed circuit is a first microstrip line 1015.
As shown in fig. 1-2, the first transmit resonator antenna includes a first coil 1011 and a second coil 1012 arranged from outside to inside, and the second coil 1012 is provided with a first connection point 1013; one end of the first microstrip line 1015 is provided with a second connection point 1014, and the other end thereof is connected with the second dielectric substrate 103 through the flexible flat cable 102; the first connection points 1013 are connected to the second connection points 1014 through via holes, and the first dielectric substrate 101 is wound in a spiral manner.
As shown in fig. 3 to 4, the second dielectric substrate 103 includes 2 layers of printed circuits, the first layer of printed circuit is a second transmission resonant antenna in the form of a rectangular spiral loop with a notch, and the second layer of printed circuit is a microstrip line coil 10137 in the form of a rectangular strip with a notch. The second transmitting resonant antenna comprises a third coil 1031, a fourth coil 1032 and a fifth coil 1033 which are arranged from outside to inside, wherein the third coil 1031 is provided with an electromagnetic energy input port 1034, and the fifth coil 1033 is provided with a third connection point 1035; one end of the microstrip line coil 1037 is provided with a fourth connection point 1036, and the other end thereof is connected with the first dielectric substrate 101 through a flexible flat cable 102; the third connection point 1035 is connected to the fourth connection point 1036 by a through hole. The winding mode of the second dielectric substrate 103 is that the first layer and the second layer are wound in a crossed manner;
the first coil 1011, the second coil 1012, the third coil 1031, the fourth coil 1032 and the fifth coil 1033 are all single-turn coils made of microstrip lines.
The geometrical parameters of the transmitting module are set as follows:
microstrip line width W in first transmission resonant antennaTx1Is 4mm-8 mm;
spacing S of adjacent microstrip lines in first transmission resonant antennaTx1Is 1mm-3 mm;
length L of first dielectric substrate 101Tx1Is 180mm-240 mm;
width H of the first dielectric substrate 101Tx1Is 95mm-135 mm;
outer length L of first coil 1011Tx1_ResIs 180mm-240 mm;
outer width H of first coil 1011Tx1_ResIs 95mm-135 mm;
width W of the first microstrip line 1015Tx2Is 4mm-8 mm;
width W of microstrip line in second transmission resonant antennaTx3Is 4mm-8 mm;
spacing S of adjacent microstrip lines in second transmitting resonant antennaTx22mm-4 mm;
length L of second dielectric substrate 103Tx2Is 180mm-240 mm;
width H of the second dielectric substrate 103Tx2Is 95mm-135 mm;
outer length L of third coil 1031Tx2_ResIs 180mm-240 mm;
outer width H of third coil 1031Tx2_ResIs 95mm-135 mm;
width W of microstrip line in microstrip line coil 1037Tx4Is 4mm-8 mm;
outer length L of microstrip line coil 1037Tx3_Res170mm-230 mm;
outer width H of microstrip line coil 1037Tx3_ResIs 87mm-127 mm.
As shown in fig. 5 to 6, the receiving resonant antenna is a rectangular spiral loop coil, and includes a sixth coil 1041 and a seventh coil 1042 arranged from outside to inside, a fifth connection point 1043 is arranged on the sixth coil 1041, and a sixth connection point 1044 is arranged on the seventh coil 1042. The parasitic resonant antenna is a rectangular spiral loop coil, and includes an eighth coil 1047 and a ninth coil 1048 which are arranged from outside to inside, a seventh connection point 1045 is arranged on the eighth coil 1047, and an eighth connection point 1046 is arranged on the ninth coil 1048.
The fifth connection point 1043 is connected to the seventh connection point 1045 through a through hole, and the sixth connection point 1044 is connected to the eighth connection point 1046 through a through hole.
The sixth coil 1041, the seventh coil 1042, the eighth coil 1047, and the ninth coil 1048 are all single-turn coils made of microstrip lines.
The geometric parameters of the receiving module 104 are set as follows:
microstrip line width W of receiving resonant antennaRx1Is 4mm-7 mm;
receiving the space S between adjacent microstrip lines in the resonant antennaRx1Is 1mm-3 mm;
length L of receiving module 104Rx1Is 120mm-150 mm;
width H of receiving module 104Rx1Is 70mm-80 mm;
outer length L of sixth coil 1041Rx1_ResIs 120mm-150 mm;
outer width H of sixth coil 1041Rx1_ResIs 70mm-80 mm;
microstrip line width W of parasitic resonant antennaRx2Is 4mm-7 mm;
spacing S of adjacent microstrip lines in parasitic resonant antennaRx2Is 1mm-3 mm;
outer length L of eighth coil 1047Rx2_ResIs 120mm-150 mm;
outer width H of eighth coil 1047Rx2_ResIs 70mm-80 mm.
The transmitter module and the receiver module 104 of the present invention are manufactured by printed circuit board process.
The working principle of the invention is as follows: a signal is input from the electromagnetic energy input port 1034 of the transmitting module, the signal generates electromagnetic oscillation on the first transmitting resonant antenna of the first dielectric substrate 101, enters the second transmitting resonant antenna of the second dielectric substrate 103 through the flexible flat cable, and returns to the electromagnetic energy input port 1034 through the flexible flat cable after bypassing two turns in the second transmitting resonant antenna of the second dielectric substrate 103, the energy is transmitted to the receiving resonant antenna and the parasitic resonant antenna of the receiving module 104 through the magnetic resonance coupling mode, and the electromagnetic energy is output from the receiving resonant antenna, and is supplied with power after rectification and voltage stabilization.
The receiving and transmitting antenna structure of the foldable magnetic resonance coupling wireless power transmission system realizes that the receiving module can be charged at different distances, different angles and different positions in the transmitting antenna area. The invention adopts the plane printed circuit board to process the antenna structure of the transceiver module, realizes the miniaturization and integration of the transceiver antenna, and has lower production, installation and maintenance costs of the transceiver antenna. The edges and corners of the antenna structure are subjected to smoothing treatment, so that the loss resistance of the antenna is reduced, and the quality factor of the antenna and the wireless energy transmission efficiency of a system are improved.
The following describes in detail a transmit-receive antenna of a foldable magnetic resonance coupling wireless power transmission system according to the present invention with 3 specific embodiments.
The first embodiment is as follows:
as shown in fig. 7, when an included angle between the first dielectric substrate and the second dielectric substrate in the transmission module is 0 °, the first dielectric substrate and the second dielectric substrate are overlapped, and two outermost turns of the first transmitting resonant antenna of the first dielectric substrate and the second outermost turn of the second transmitting resonant antenna of the second dielectric substrate are overlapped.
In this embodiment, the electrical parameters of the antennas in the transmitting module and the receiving module are set as follows:
the transmitting resonant antenna is connected with an adjustable capacitor in series of 47-49 pF;
the parallel adjustable capacitance of the transmitting resonant antenna is 30-75 pF;
the receiving resonant antenna is connected with an adjustable capacitor in series of 120-150 pF;
the parallel adjustable capacitance of the receiving resonant antenna is 400-680 pF.
In this embodiment, when the electromagnetic energy input port 1034 loads the radio frequency signal to the second transmitting resonant antenna of the second dielectric substrate 103, the winding directions and phases of the antennas of the first dielectric substrate 101 and the second dielectric substrate 103 are opposite, and the magnetic fluxes generated by the two groups of antennas are cancelled out in opposite phases. The number of turns of the antenna of the first dielectric substrate 101 is not equal to that of the antenna of the second dielectric substrate 103, and the structural parameters are not identical, so that the magnetic fluxes of the antenna of the first dielectric substrate 101 and the antenna of the second dielectric substrate 103 are not equal, the magnetic fluxes generated by the two groups of antennas can be offset, the coupling distance between the transmitting module and the receiving module 104 is reduced, the uniform distribution of an over-coupled magnetic field is ensured, and the transmission efficiency when the receiving module 104 is positioned above the transmitting antenna at a short distance is improved.
As shown in fig. 8, when the center of the receiving module 104 coincides with the points a, B, and C of the second dielectric substrate 103, the power transmission efficiency is 87% or more, and when the center of the receiving module 104 is connected to the point B of the transmitting module, the transmission efficiency is the highest, which is 94% or more.
In this embodiment, the power transmission distance of the transceiver module is 4mm-7mm, and the transmission efficiency is greater than 80%, and within the effective distance, along with the lateral movement of the receiver module, the transmission efficiency is not significantly reduced, and the horizontal degree of freedom is good.
Example two:
as shown in fig. 9, when the included angle between the first dielectric substrate 101 and the second dielectric substrate 103 in the transmitting module is [90 °,150 ° ], the electrical parameters of the antennas in the transmitting module and the receiving module 104 are set as follows:
the transmitting resonant antenna is connected with an adjustable capacitor in series, wherein the adjustable capacitor is 330-680 pF;
the parallel adjustable capacitor of the transmitting resonant antenna is 0 pF;
the receiving resonant antenna is connected with an adjustable capacitor in series of 120-150 pF;
the parallel adjustable capacitance of the receiving resonant antenna is 400-680 pF.
As shown in fig. 10, in the case that the frequency of the radio frequency signal is 6.78MHz, it can be seen from the figure that, when the distance between the transmitting module and the receiving module is between 5cm and 11cm, the transmission efficiency of the transceiving antenna is relatively balanced, and when the distance between the transceiving modules is 12cm, the transmission efficiency of the present invention is greater than 80%. The invention has stable transmission efficiency and ensures the effective transmission of electric energy within a certain distance.
As shown in fig. 11, when the distance between the transmitting module and the receiving module is 7cm, it can be seen from the figure that the transmission efficiency of the present invention is greater than 83% at angles of 15 °, 30 °, 45 ° and 60 °, and the transmission efficiency is relatively stable with the change of the angle. The invention has stable transmission efficiency at multiple angles, so that the system has more application scenes.
In this embodiment, when the electromagnetic energy input port 1034 loads the radio frequency signal to the second transmitting resonant antenna of the second dielectric substrate 103, the winding direction and the radio frequency current phase of the antenna of the first dielectric substrate 101 and the antenna of the second dielectric substrate 103 are the same, and the magnetic fluxes generated in the two groups of antennas are superposed in a positive phase, so that the coupling strength and the transmission efficiency between the transceiver modules when the receiving module 104 is located at a longer distance from the transmitting module are improved. The first dielectric substrate 101 and the second dielectric substrate 103 form a certain included angle, so that magnetic fields generated in different directions are superposed at the receiving module 104, and the coupling strength and the transmission efficiency between the receiving and transmitting modules are ensured.
As shown in fig. 12, when the included angle between the first dielectric substrate 101 and the second dielectric substrate 103 is between 90 ° and 150 °, the transmission efficiency is stable.
In this embodiment, the power transmission distance of the transceiver module is 50mm-120mm, and the transmission efficiency is greater than 80%, and within the effective distance, along with the lateral movement of the receiving module, the receiving module and the transmitting module can form a certain angle and the transmission efficiency is stable.
Example three:
as shown in fig. 13, when the included angle between the first dielectric substrate 101 and the second dielectric substrate 103 in the transmitting module is 180 °, the electrical parameters of the antennas in the transmitting module and the receiving module 104 are set as follows:
the transmitting resonant antenna is connected with an adjustable capacitor in series, wherein the adjustable capacitor is 330-680 pF;
the parallel adjustable capacitor of the transmitting resonant antenna is 0 pF;
the receiving resonant antenna is connected with an adjustable capacitor in series of 120-150 pF;
the parallel adjustable capacitance of the receiving resonant antenna is 400-680 pF.
In this embodiment, when the electromagnetic energy input port 1034 loads the radio frequency signal to the second transmitting resonant antenna of the second dielectric substrate 103, the winding direction and the radio frequency current phase of the antenna of the first dielectric substrate 101 and the antenna of the second dielectric substrate 103 are the same, and the magnetic fluxes generated in the two groups of antennas are superposed in a positive phase, so that the transverse transmitting area of the transmitting module is greatly increased, the chargeable area is increased, and the charging in the whole transmitting area and the power supply for the receiving module can be realized at the same time.
As shown in fig. 14, in the present embodiment, when the center of the receiving module 104 coincides with the point D, the point E, and the point F of the first dielectric substrate 101, the power transmission efficiency is 87% or more.
In this embodiment, the power transmission distance of the transceiver module is 4mm-7mm, and the transmission efficiency is greater than 80%, and within the effective distance, along with the lateral movement of the receiver module, the transmission efficiency is stable.
In the embodiment of the present invention, all the second dielectric substrates 103 are horizontally disposed.
Claims (8)
1. A foldable transceiving antenna of a magnetic resonance coupled wireless power transfer system, characterized by comprising a transmitting module for wireless power transmission and a receiving module (104) for wireless power reception;
the emission module is of a flat plate type structure and comprises a first dielectric substrate (101) and a second dielectric substrate (103) which are connected through a flexible flat cable (102), and the included angle between the first dielectric substrate (101) and the second dielectric substrate (103) is 0 degree, 90 degrees, 150 degrees or 180 degrees;
the receiving module (104) is of a flat plate type structure, the front surface of the receiving module is provided with a receiving resonant antenna, and the back surface of the receiving module is provided with a parasitic resonant antenna.
2. The foldable transceiving antenna of claim 1, wherein the first dielectric substrate (101) comprises 2 layers of printed circuits, the first layer of printed circuits is a first transmit resonant antenna, the second layer of printed circuits is a first microstrip line (1015); the first transmitting resonant antenna comprises a first coil (1011) and a second coil (1012) which are arranged from outside to inside, and a first connecting point (1013) is arranged on the second coil (1012); one end of the first microstrip line (1015) is provided with a second connection point (1014), and the other end of the first microstrip line is connected with the second dielectric substrate (103) through a flexible flat cable (102); the first connecting point (1013) is connected with the second connecting point (1014) through a through hole, and the first dielectric substrate (101) is wound in a spiral winding mode;
the first coil (1011) and the second coil (1012) are both single-turn coils made of microstrip lines.
3. The foldable transceiving antenna of a magnetic resonance coupled wireless power transfer system according to claim 2, wherein the geometrical parameters of the first dielectric substrate (101) are set as follows:
the width W of the microstrip line in the first transmission resonant antennaTx1Is 4mm-8 mm;
a space S between adjacent microstrip lines in the first transmission resonant antennaTx1Is 1mm-3 mm;
a length L of the first dielectric substrate (101)Tx1Is 180mm-240 mm;
the width H of the first dielectric substrate (101)Tx1Is 95mm-135 mm;
an outer length L of the first coil (1011)Tx1_ResIs 180mm-240 mm;
an outer width H of the first coil (1011)Tx1_ResIs 95mm-135 mm;
a width W of the first microstrip line (1015)Tx2Is 4mm-8 mm.
4. The foldable transceiving antenna of claim 1, wherein the second dielectric substrate (103) comprises 2 layers of printed circuits, the first layer of printed circuits is a second transmitting resonant antenna of a rectangular spiral loop with a gap, and the second layer of printed circuits is a microstrip coil (1037) of a rectangular microstrip with a gap; the second transmitting resonant antenna comprises a third coil (1031), a fourth coil (1032) and a fifth coil (1033) which are arranged from outside to inside, wherein the third coil (1031) is provided with an electromagnetic energy input port (1034), and the fifth coil (1033) is provided with a third connection point (1035); one end of the microstrip line coil (1037) is provided with a fourth connection point (1036), and the other end of the microstrip line coil is connected with the first dielectric substrate (101) through a flexible flat cable (102); the third connection point (1035) is connected to a fourth connection point (1036) by a through hole; the winding mode of the second dielectric substrate (103) is that a first layer and a second layer are wound in a crossed mode;
and the third coil (1031), the fourth coil (1032) and the fifth coil (1033) are all single-turn coils made of microstrip lines.
5. The foldable transceiving antenna of claim 4, wherein the geometrical parameters of the second dielectric substrate (103) are set as follows:
width W of microstrip line in the second transmission resonant antennaTx3Is 4mm-8 mm;
the distance S between adjacent microstrip lines in the second transmitting resonant antennaTx22mm-4 mm;
a length L of the second dielectric substrate (103)Tx2Is 180mm-240 mm;
the width H of the second dielectric substrate (103)Tx2Is 95mm-135 mm;
an outer length L of the third coil (1031)Tx2_ResIs 180mm-240 mm;
an outer width H of the third coil (1031)Tx2_ResIs 95mm-135 mm;
a width W of a microstrip line of the microstrip line coil (1037)Tx4Is 4mm-8 mm;
an outer length L of the microstrip line coil (1037)Tx3_Res170mm-230 mm;
an outer width H of the microstrip line coil (1037)Tx3_ResIs 87mm-127 mm.
6. The foldable transceiving antenna of a magnetic resonance coupled wireless power transfer system according to claim 1, wherein the receiving resonant antenna is a rectangular spiral loop coil comprising a sixth coil (1041) and a seventh coil (1042) arranged from outside to inside, the sixth coil (1041) is provided with a fifth connection point (1043), and the seventh coil (1042) is provided with a sixth connection point (1044); the parasitic resonant antenna is a rectangular spiral annular coil and comprises an eighth coil (1047) and a ninth coil (1048) which are arranged from outside to inside, a seventh connection point (1045) is arranged on the eighth coil (1047), and an eighth connection point (1046) is arranged on the ninth coil (1048);
the fifth connecting point (1043) is connected with a seventh connecting point (1045) through a through hole, and the sixth connecting point (1044) is connected with an eighth connecting point (1046) through a through hole;
the sixth coil (1041), the seventh coil (1042), the eighth coil (1047) and the ninth coil (1048) are all single-turn coils made of microstrip lines.
7. The foldable transceiving antenna of claim 6, wherein the geometric parameters of the receiving module are set as follows:
the microstrip line width W of the receiving resonant antennaRx1Is 4mm-7 mm;
the distance S between adjacent microstrip lines in the receiving resonant antennaRx1Is 1mm-3 mm;
a length L of the receiving module (104)Rx1Is 120mm-150 mm;
width H of the receiving module (104)Rx1Is 70mm-80 mm;
an outer length L of the sixth coil (1041)Rx1_ResIs 120mm-150 mm;
an outer width H of the sixth coil (1041)Rx1_ResIs 70mm-80 mm;
the width W of the microstrip line of the parasitic resonant antennaRx2Is 4mm-7 mm;
the distance S between adjacent microstrip lines in the parasitic resonant antennaRx2Is 1mm-3 mm;
an outer length L of the eighth coil (1047)Rx2_ResIs 120mm-150mm；
An outer width H of the eighth coil (1047)Rx2_ResIs 70mm-80 mm.
8. The foldable transceiving antenna of claim 1 to 7, wherein the corners of the coils of the transmitting module and the receiving module (104) are smooth circular arc structures.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114243950A (en) * | 2021-12-24 | 2022-03-25 | 中国矿业大学(北京) | Mining wireless power transmission device with offset transmission angle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114243950A (en) * | 2021-12-24 | 2022-03-25 | 中国矿业大学(北京) | Mining wireless power transmission device with offset transmission angle |
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