阅读说明：本技术 一种ybco薄膜结构的超导谐振器及无线传能装置 (Superconducting resonator with YBCO thin film structure and wireless energy transfer device ) 是由 王秀芳 严仲明 何应达 缪宇 于 2019-10-17 设计创作，主要内容包括：本发明涉及无线传能技术领域,具体涉及一种YBCO薄膜结构的超导谐振器及无线传能装置,包括基底和设在基底上的YBCO微带线,所述YBCO微带线为一条完整的左螺旋条带,具体包括多个由内向外依次设置的环带,所述环带上设置有开口,所述开口设在同一直线上,开口的两端分别为上连接点和下连接点,相邻的两个环带,在外环带的下连接点通过连接条与在内环带的上连接点连接。本发明提出的谐振器工作在液氮温区,可以作为无线传能的中继线圈、发射线圈或接收线圈,谐振器采用矩形螺旋谐振环,具有紧凑的结构和较高的电容效应,从而具有较低谐振频率,满足磁谐振无线传能系统的应用,具有较高的传输效率,系统的复杂程度低,系统总体损耗小。(The invention relates to the technical field of wireless energy transmission, in particular to a superconductive resonator with a YBCO thin film structure and a wireless energy transmission device, which comprise a substrate and a YBCO microstrip line arranged on the substrate, wherein the YBCO microstrip line is a complete left spiral strip and specifically comprises a plurality of annular bands which are sequentially arranged from inside to outside, openings are arranged on the annular bands, the openings are arranged on the same straight line, two ends of each opening are respectively an upper connection point and a lower connection point, two adjacent annular bands are arranged, and the lower connection point of the outer annular band is connected with the upper connection point of the inner annular band through a connection strip. The resonator provided by the invention works in a liquid nitrogen temperature region, can be used as a relay coil, a transmitting coil or a receiving coil of wireless energy transfer, adopts a rectangular spiral resonance ring, has a compact structure and a higher capacitance effect, has lower resonance frequency, meets the application of a magnetic resonance wireless energy transfer system, has higher transmission efficiency, and has low system complexity and small overall system loss.)

1. A superconductive resonator of YBCO film structure is characterized in that: comprises a substrate (1) and a YBCO microstrip line (2) arranged on the substrate (1), the YBCO microstrip line (2) is a complete left-spiral strip, the spiral direction is clockwise spiral direction from inside to outside, YBCO microstrip line (2) include a plurality of clitellum (3) that set gradually from inside to outside, it is provided with one opening (4) respectively to divide equally on clitellum (3) of every round, opening (4) on clitellum (3) of every round are all seted up on clitellum (3) same side, the both ends of opening (4) are tie point and tie point down respectively, the last tie point of whole opening (4) is located same straight line, the lower tie point of whole opening (4) also is located same straight line, inside and outside two adjacent clitellums (3), the lower tie point of clitellum (3) of outer lane passes through tie bar (5) and is connected with the last tie point of clitellum (3) of adjacent inner circle.

2. A superconducting resonator of YBCO thin film structure according to claim 1, characterized in that: the annular bands (3) are arranged from inside to outside in sequence and are rectangular frame-shaped structures, each circle of annular band (3) is provided with a long edge and a short edge in the length direction and the width direction respectively, the annular bands (3) are arranged in a concentric square frame shape with a plurality of circles, and the area or the side length of each annular band (3) is increased from the inner circle to the outer circle in sequence.

3. A superconducting resonator of YBCO thin film structure according to claim 1, characterized in that: the opening (4) on each ring of the girdle band (3) is arranged on the long edge of the same side of the girdle band (3).

4. A superconducting resonator of YBCO thin film structure according to claim 1, characterized in that: the adjacent annular belts (3) are equally spaced.

5. The superconducting resonator of YBCO thin film structure according to claim 4, characterized in that: the distance between adjacent ring belts (3) is 3 to 15mm, and the distance between adjacent ring belts (3) is 3 to 6 percent of the circumference of the innermost ring belt (3).

6. The superconducting resonator of YBCO thin film structure according to claim 4, characterized in that: the line width of the YBCO microstrip line (2) is 0.5-5 mm.

7. A superconducting resonator of YBCO thin film structure according to claim 1, characterized in that: the gap length between the upper and lower connection points of the opening (4) is 2 to 10mm, and the plurality of connection strips (5) are parallel to each other.

8. A superconducting resonator of YBCO thin film structure according to claim 7, characterized in that: the distance between the adjacent connecting strips (5) is 3-15 mm, and the distance between the adjacent connecting strips (5) is related to the distance between the adjacent annular bands (3) and increases along with the increase of the distance between the adjacent annular bands (3); the number of the ring belt (3) is 5 to 15.

9. A wireless energy transfer device, comprising: the superconducting resonator comprises a driving coil (9), a first resonant coil (10), a relay coil (11), a second resonant coil (12) and a load coil (13) which are arranged from left to right in sequence, wherein the relay coil (11) is the superconducting resonator according to any one of claims 1 to 9, the driving coil (9) is connected with a power supply (14), and the load coil (13) is connected with a load (15).

10. A wireless energy transfer device according to claim 9, wherein: the power supply (14) is an alternating-current high-frequency power supply, when the power supply is used, the driving coil (9) obtains electric energy from the power supply (14), the driving coil (9) and the first resonance coil (10) are in magnetic induction coupling to achieve energy transfer, the superconducting resonator with the YBCO thin-film structure serves as a relay coil (11) to further amplify and focus a magnetic field and then transfer the magnetic field to the second resonance coil (12), the first resonance coil (10) is transferred to the second resonance coil (12), the middle energy transfer mode is magnetic resonance, the resonance frequencies of the first resonance coil (10), the relay coil (11) and the second resonance coil (12) are the same, the second resonance coil (12) and the load coil (13) achieve energy transfer through magnetic induction coupling, and finally the energy is transferred to the load (15).

Technical Field

The invention relates to the technical field of wireless energy transmission, in particular to a superconductive resonator with a YBCO film structure and a wireless energy transmission device.

Background

The wireless energy transmission technology is a leading-edge subject integrating basic research and application research, utilizes electromagnetic waves as carriers to transmit energy, and has more advantages compared with wired electric energy. The defects that the traditional wired power transmission mode cannot meet the requirements of special application occasions such as mines, water and the like, and the traditional cable power supply mode in the environments often causes fatality, explosion, fire, equipment damage and the like in severe cases, and brings great potential safety hazards and economic loss are overcome. In addition, in daily life, the wireless power transmission can avoid or reduce the winding of wires of living electric appliances used by people, so that the life is more convenient. Magnetic resonance type wireless energy transmission technology has been rapidly developed in recent two years, the transmission distance is long compared with magnetic induction type wireless energy transmission, and the application range is wider. The resonant coil is a key component in magnetic coupling resonant wireless power transmission, and the performance of the resonant coil directly affects the transmission efficiency, power, transmission distance and the like of a system.

The high-performance resonant coil needs to have a higher quality factor, and the following factors are mainly included to influence the performance of the resonant coil: the number of turns of the coil, the winding method of the coil, the design of the turn-to-turn pitch, the selection of materials and the like. In a wireless transmission system, the transmission loss of the system mainly includes two parts, i.e., radiation loss and ohmic loss. In the magnetic coupling resonance type wireless energy transmission system, the wireless transmission of energy is mainly carried out by utilizing a near field. In the higher frequency part, the transmission loss is equivalent to the sum of the radiation loss and the ohmic loss. The radiation losses can be neglected in the lower frequency part, and are primarily ohmic losses. I.e. mainly from the losses of the resonant coil. If the number of turns N of the coil and the radius r of the coil are increased, the ohmic resistance is also increased, and thus the transmission efficiency of the system is reduced. In order to improve the transmission efficiency of the resonant coupling type wireless power transmission system, a lead with larger conductivity and wider wire diameter can be selected to improve the transmission efficiency of the system. A metamaterial is a material that exhibits no resistance under certain conditions and is a good choice.

Metamaterials are artificial composite structures or composites that have extraordinary physical properties not possessed by natural materials that have recently developed in the 21 st century. The concept of meta-material was first proposed by the physics of soviet corporation in 1968, which theoretically analyzed the propagation of electromagnetic waves in negative permeability and negative permittivity materials, he defined this material as left-handed material, which was just a prediction, until 1999, professor John Pendry of the university of the british science designed an open-ended resonant ring Structure (SRR), 2001, shelby of the university of california, which combined copper wires with 2 micro-structural units of an open-ended copper ring. The metamaterial concept is expanded in breadth, and the periodic unit design from the beginning is expanded to the material which does not exist in the nature, so that the metamaterial can be called as the metamaterial different from the conventional material. The magnetic metamaterial refers to an artificial composite material or a composite structure which is composed of sub-wavelength unit structures and has equivalent permeability less than 1, and the metamaterial is generally called as a magnetic metamaterial because negative equivalent permeability and 0-1 equivalent permeability are generated based on magnetic resonance of metamaterial structure units responding to an incident electromagnetic field. Accordingly, the metallic structural elements used to implement the magnetic metamaterial are referred to as magnetic resonators.

Disclosure of Invention

In order to enrich the existing resonator technology, the invention provides a superconducting resonator with a YBCO thin film structure and a wireless energy transfer device with high transmission efficiency and small loss. The resonator works in a liquid nitrogen temperature region and can be used as a relay coil, a transmitting coil or a receiving coil of wireless energy transfer, and the resonator adopts a rectangular spiral resonance ring, has a compact structure and a higher capacitance effect, so that the resonator has lower resonance frequency and meets the application of a magnetic resonance wireless energy transfer system.

The purpose of the invention is realized by the following technical scheme:

the utility model provides a superconductive resonator of YBCO film structure, includes basement and the YBCO microstrip line of setting on the basement, the YBCO microstrip line is a complete left-handed spiral strip, and the spiral direction is clockwise spiral direction in proper order from inside to outside, the YBCO microstrip line includes a plurality of clitellum that set gradually from inside to outside, equally divide on the clitellum of every round and do not be provided with an opening, and the opening on each clitellum is all seted up on the side of clitellum with one side, and the both ends of opening are upper junction point and lower junction point respectively, and the upper junction point of all openings lies in same straight line, and the lower junction point of all openings also lies in another same straight line, inside and outside two adjacent clitellums, and the lower junction point of the clitellum of outer lane passes through the tie bar and is connected with the upper junction.

According to the superconducting resonator with the YBCO film structure, a plurality of annular bands which are sequentially arranged from inside to outside are rectangular frame-shaped structures, each circle of annular band is provided with a long edge and a short edge in the length direction and the width direction respectively, the annular bands are arranged in a plurality of circles of concentric frames, and the area or the side length of each annular band is increased from the inner circle to the outer circle in sequence.

Preferably, the openings in each loop are open on the long side of the same side of the loop.

More preferably, in the superconducting resonator of the YBCO thin film structure, the adjacent annular bands are equally spaced.

Preferably, in the superconducting resonator of the YBCO thin film structure, a distance between adjacent annuli is 3 to 15mm, and the distance between adjacent annuli is 3% to 6% of a circumference of an innermost annulus.

As a more preferable scheme, in the superconducting resonator with the YBCO thin film structure, the line width of the YBCO microstrip line is 0.5 to 5mm, the line width dimension is related to the frequency of the wireless energy transmission system, and an appropriate dimension is selected according to the resonant frequency.

Further, in the superconducting resonator of the YBCO thin film structure, a gap length between an upper connection point and a lower connection point of the opening is 2 to 10mm, and the plurality of connection bars are parallel to each other.

Furthermore, in the superconducting resonator with the YBCO thin film structure, the distance between the adjacent connecting strips is 3 to 15mm, and the distance between the adjacent connecting strips is related to the distance between the adjacent ring bands and increases with the increase of the distance between the adjacent ring bands; the number of the endless belts is set to 5 to 15.

The invention further provides a wireless energy transfer device which comprises a driving coil, a first resonance coil, a relay coil, a second resonance coil and a load coil, wherein the driving coil, the first resonance coil, the relay coil, the second resonance coil and the load coil are sequentially arranged from left to right, the relay coil is the superconducting resonator, the driving coil is connected with a power supply, and the load coil is connected with a load.

The power supply is an alternating-current high-frequency power supply, when the wireless energy transfer device is used, the driving coil obtains electric energy from the power supply, the driving coil and the first resonance coil are in magnetic induction coupling to realize energy transfer, the superconducting resonator of the YBCO thin film structure serves as a relay coil to further amplify and focus a magnetic field and then transfer the magnetic field to the second resonance coil, the middle energy transfer mode is magnetic resonance from the first resonance coil to the second resonance coil, the resonance frequencies of the first resonance coil, the relay coil and the second resonance coil are the same, the energy transfer is realized between the second resonance coil and the load coil through the magnetic induction coupling, and finally the energy is transferred to the load.

The invention adopts a miniaturized SRR left-handed material unit, the ring belt part of the YBCO microstrip line of the unit is equivalent to an inductor, the opening part is equivalent to a capacitor, and when the magnetic field component of external electromagnetic waves passes through the YBCO microstrip coil, external field energy is coupled into the YBCO split ring resonator, thereby forming an LC resonance circuit; the adjacent annuluses of the miniaturized SRR are directly connected at the opening, so that the total capacitance of the SRR unit is the parallel connection relation of the capacitances of the rings, along with the increase of the number of turns of the rings, the inductance and the capacitance of the SRR unit are increased, and the SRR unit is connected with the corresponding annuluses in parallel according to the resonance frequency

It can be known that resonators with any resonance frequency can be obtained, and can be further applied to wireless energy transfer systems.

The invention has the beneficial effects that: according to the superconducting resonator with the YBCO film structure and the wireless energy transfer device, the resonator works in a liquid nitrogen temperature zone and can be used as a relay coil, a transmitting coil or a receiving coil of wireless energy transfer, the resonator adopts a rectangular spiral resonance ring, and has a compact structure and a high capacitance effect, so that the superconducting resonator has low resonance frequency, meets the application of a magnetic resonance wireless energy transfer system, and has high transmission efficiency, low complexity of the system and small overall loss of the system.

Drawings

FIG. 1 is a schematic diagram of a superconducting resonator according to the present invention;

fig. 2 is a schematic structural diagram of a YBCO microstrip line according to the present invention;

fig. 3 is a current flow diagram of a YBCO microstrip line of the present invention;

FIG. 4 is an equivalent circuit diagram of a superconducting resonator of the present invention;

FIG. 5 is a schematic structural diagram of a wireless energy transmission device according to the present invention

In the figure, 1-substrate, 2-YBCO microstrip line, 3-ring band, 4-opening, 5-connecting bar, 6-inductor, 7-resistor, 8-capacitor, 9-driving coil, 10-first resonance coil, 11-relay coil, 12-second resonance coil, 13-load coil, 14-power supply and 15-load.

Detailed Description

The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.

Superconducting materials are materials with superconductivity which are good conductors with a low electrical resistance at room temperature, but which have a decreasing electrical resistance as the temperature decreases, and their electrical resistance suddenly disappears when the temperature reaches below the critical temperature TC (the critical temperature corresponding to the transition of a superconductor from a normal state with a certain electrical resistance to a superconducting state with zero electrical resistance). High temperature superconducting materials are mainly divided into two categories: yttrium Barium Copper Oxide (YBCO) and Bismuth Strontium Calcium Copper Oxide (BSCCO).

YBCO, known as Yttrium Barium Copper Oxide, is a crystal with the chemical formula YBa 2 Cu 3O 7-x. YBCO is a well-known high temperature superconductor and is the first material to produce a transition temperature above the boiling point of liquid nitrogen. It can maintain superconducting characteristics at a temperature higher than the boiling point (77K) of liquid nitrogen.

Yttrium Barium Copper Oxide (YBCO) is generally used for preparing superconducting films and is applied to the fields of electronics, communication and the like; the bismuth strontium calcium copper oxide is mainly used for manufacturing wires. The YBCO high-temperature superconductor belongs to one of the oxide superconductors, and belongs to the second type of superconductor according to the result of the magnetization test.

As shown in fig. 1 to 4, the superconducting resonator of a YBCO thin film structure according to the present invention includes a substrate 1 and a YBCO microstrip line 2 disposed on the substrate 1, where the YBCO microstrip line 2 is a complete left-handed spiral strip, that is, the spiral direction is clockwise spiral direction from inside to outside in proper order, the YBCO microstrip line 2 specifically includes a plurality of clitellum 3 that set gradually from inside to outside, it is provided with an opening 4 respectively to divide equally on the clitellum 3 of every round, opening 4 on every clitellum 3 all sets up on the side of clitellum 3 with one side, the both ends of opening 4 are upper junction point and lower junction point respectively, the upper junction point of all openings 4 is located same straight line, the lower junction point of all openings 4 also is located same straight line, inside and outside two adjacent clitellums 3, the lower junction point of the clitellum 3 of outer lane is connected with the upper junction point of the clitellum 3 of adjacent inner circle through connecting strip 5. When the YBCO microstrip line resonator is used, the ring band 3 part of the YBCO microstrip line 2 is equivalent to an inductor 6, the opening 4 part is equivalent to a capacitor 7, and when the magnetic field component of external electromagnetic waves passes through the YBCO microstrip coil, external field energy is coupled into the YBCO split ring resonator, so that an LC resonance loop is formed; the inner and outer adjacent ring belts 3 are directly connected at the opening 4, so that the total capacitance is the parallel connection of all ring capacitances, and along with the increase of the number of turns of the ring belts 3, the inductance and the capacitance of the resonator are increased according to the resonance frequency omega₀2-1/LC, the resonator with any resonance frequency can be obtained, and the resonator can be further applied to a wireless energy transfer system.

Specifically, the plurality of annular bands 3 arranged in sequence from inside to outside are all rectangular frame-shaped structures, each annular band 3 of each circle has a long side and a short side in the length and width directions, and the area or the side length of each annular band 3 increases from the inner circle to the outer circle in sequence and is arranged in concentric frames of a plurality of circles, as shown in fig. 1 to 3.

Specifically, the intervals between the inner and outer adjacent endless belts 3 are equal.

Specifically, the pitch between the adjacent bands 3 is 3 to 15mm, and its specific size is related to the circumference of the innermost band 3, and the pitch between the adjacent bands 3 is 3% to 6% of the circumference of the innermost band 3.

Specifically, the line width of the YBCO microstrip line 2 is 0.5 to 5mm, and the specific size thereof is related to the size of the surface area occupied by the entire loop band 3 frame, and when the surface area occupied by the loop band 3 frame is larger, the width of the microstrip line 2 is wider.

In the present embodiment, the length of the loop band 3 disposed at the outermost layer is 10 to 12cm, the width thereof is 8 to 11cm, the length of the loop band 3 disposed at the innermost layer is 3 to 5cm, and the width thereof is 2 to 4cm, although the number of turns of the loop band 3 disposed, and the length and width dimensions of the innermost and outermost turns are closely related to the power required for wireless energy transmission, and the larger the power is, the larger the number of turns is, and the larger the length and width dimensions of the outermost turn is.

Specifically, the gap length between the upper connection point and the lower connection point of the opening 4 is 2 to 10mm, and its specific dimension is related to the length-width dimension of the innermost circumferential zone 3, and the length dimension of the opening 4 is larger as the length of the innermost circumferential zone 3 is longer, and the opening 4 is opened on the long side of the same side of the zone 3.

Specifically, the connecting strips 5 are parallel to each other, and the specific shape is as shown in fig. 1 to 3.

Specifically, the pitch between the adjacent connecting strips 5 is 3 to 15mm, and the pitch between the adjacent connecting strips 5 is closely related to the pitch between the adjacent circumferential bands 3 and increases as the pitch between the adjacent circumferential bands 3 increases.

Specifically, the YBCO microstrip line 2 includes six endless belts 3, the number of the endless belts 3 arranged from the inner ring to the outer ring may also be more than 6, or less than 6, for example, the number of the endless belts 3 may be 5 to 15, the specific number of the endless belts is related to the power required to be wirelessly transmitted, and the larger the power required to be wirelessly transmitted, the more the number of the endless belts.

As shown in fig. 5, the wireless energy transfer device includes a drive coil 9, a first resonance coil 10, a relay coil 11, a second resonance coil 12, and a load coil 13, which are arranged in this order from left to right, the relay coil 11 is the aforementioned superconducting resonator, the drive coil 9 is connected to a power source 14, and the load coil 13 is connected to a load 15.

The power supply 14 is an alternating current high frequency power supply.

When the superconducting magnetic resonance energy transfer system is used, the driving coil 9 obtains electric energy from the power supply 14, the driving coil 9 and the first resonance coil 10 are in magnetic induction coupling to realize energy transfer, the superconducting resonator of the YBCO thin film structure serves as a relay coil 11 in the system, a magnetic field is further amplified and focused, then the superconducting resonator is transferred to the second resonance coil 12, magnetic resonance is adopted for the intermediate energy transfer from the first resonance coil 10 to the second resonance coil 12, therefore, the resonance frequencies of the first resonance coil 10, the relay coil 11 and the second resonance coil 12 are the same, the second resonance coil 12 and the load coil 13 are in magnetic induction coupling to finally realize energy transfer, and the energy is transferred to the load 15.

The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.