WO2019140587A1 - Corps structural d'unité de métamatériau magnétique basse fréquence et dispositif de combinaison associé - Google Patents

Corps structural d'unité de métamatériau magnétique basse fréquence et dispositif de combinaison associé Download PDF

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Publication number
WO2019140587A1
WO2019140587A1 PCT/CN2018/073193 CN2018073193W WO2019140587A1 WO 2019140587 A1 WO2019140587 A1 WO 2019140587A1 CN 2018073193 W CN2018073193 W CN 2018073193W WO 2019140587 A1 WO2019140587 A1 WO 2019140587A1
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WO
WIPO (PCT)
Prior art keywords
material unit
unit structure
magnetic material
low frequency
magnetic
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Application number
PCT/CN2018/073193
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English (en)
Chinese (zh)
Inventor
李云辉
曾超
李果
王宇倩
郭桂春
余维健
方恺
陈宇光
张冶文
陈鸿
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同济大学
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Application filed by 同济大学 filed Critical 同济大学
Priority to PCT/CN2018/073193 priority Critical patent/WO2019140587A1/fr
Publication of WO2019140587A1 publication Critical patent/WO2019140587A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings

Definitions

  • the present invention relates to the field of radio energy transmission technologies, and in particular to a low frequency magnetic material unit structure for high power radio energy transmission and a combination thereof.
  • the conventional copper wire wound coil still has some problems: on the one hand, although the process of winding a multi-turn coil on the market is very mature, the coil structure is relatively simple, and the magnetic field generated by the coil is often unevenly distributed.
  • the transmitting coil and the receiving coil are not strictly aligned, and the charging efficiency is very low; on the other hand, there are very few magnetic materials that can exist in the low frequency band (generally 1 MHz or less) in nature, and the available range of electromagnetic parameters is relatively small. Therefore, it is urgent to introduce a new type of electromagnetic material which is easy to be miniaturized and rich in electromagnetic field control means.
  • Meite materials refer to a class of artificial electromagnetic microstructure materials having physical properties not possessed by natural materials, which have sub-wavelength characteristics, which means that the material size is generally less than 1/0 of the electromagnetic wave vacuum wavelength. 1000.
  • Meite materials can realize functions that conventional materials cannot achieve in terms of emission and reception, storage and regulation of electromagnetic waves. For example, artificially designed negative relative magnetic permeability can be realized.
  • the negative magnetic response of Meite's materials can bring unique magnetic field near-field control characteristics. For example, Professor DRSmith of Duke University in the United States uses the phenomenon of perfect lens imaging to achieve near-field amplification of magnetic fields during radio energy transmission. This has improved transmission efficiency by nearly three times.
  • Meite materials are mostly based on the printed circuit board process, and its application is mainly in the megahertz band, and the power level supported is not high.
  • current megahertz (MHz) materials made by printed circuit (PCB) processing technology are difficult to withstand 220V high voltage and high currents above 5A.
  • PCB printed circuit
  • the present invention provides a low-frequency magnetic material unit structure and a combination device thereof, which solves the existing application of the US special material by adopting a process in which a metal wire is multi-twisted and combined with a lumped parameter electronic component. It can support the technical problems of low power level and realize the purpose of applying magnetic special materials to high-power and low-frequency radio energy transmission of more than one hundred watts.
  • the technical solution adopted by the present invention is to provide a low frequency magnetic material unit structure including an insulating dielectric plate and a metal wire supporting a power above a watt level and a lumped parameter electronic component.
  • the material unit structure is formed into a deep sub-wavelength scale; wherein: the metal wire is multi-twisted on the insulating dielectric plate; the lumped parameter electronic component is connected to the metal wire and mounted on the insulating medium
  • the magnetic Mete material unit structure resonates the magnetic material unit structure by loading the lumped parameter electronic component tuning frequency and by the metal wire having an equivalent magnetic permeability.
  • the frequency tuning range of the magnetic material unit structure is from 1 kHz to 100 MHz.
  • the equivalent magnetic permeability tuning range of the magnetic material unit structure is -100 to 100.
  • the equivalent magnetic permeability of the magnetic material unit structure has a special response of less than one.
  • the insulating dielectric plate is a polymethyl methacrylate (PMMA) plate.
  • the metal wire is selected from the group consisting of a solid copper wire, a litz wire or a copper tube.
  • the lumped parameter electronic component is soldered to the first end of the metal wire to be mounted on the dielectric substrate.
  • the lumped parameter electronic component is a metallized polyester film capacitor.
  • the metal wire and the lumped parameter electronic component are components supporting a power of more than 100 watts.
  • the present invention further provides a low frequency magnetic material unit structure assembly device comprising a plurality of the aforementioned low frequency magnetic material unit structures.
  • the magnetic material unit structure is arranged in a two-dimensional plane or a three-dimensional space by periodic replication or by a specific spatial distribution function.
  • the Meite material unit structure assembly device is an equivalent continuous magnetic medium having an equivalent magnetic permeability uniformity or a gradient distribution.
  • the present invention provides a low frequency magnetic material that can be used for high power wireless energy transmission of more than one hundred watts by using a process in which metal wires are multi-twisted and combined with lumped parameter electronic components.
  • the magnetic material unit of the present invention by the foregoing technical solution, enables the equivalent magnetic permeability of the material unit to have a special response of less than 1 in the designed frequency range.
  • the magnetic material unit of the present invention has a deep sub-wavelength characteristic, and the material unit size is less than 1/1000 of the electromagnetic wave vacuum wavelength, which is advantageous for realizing the application of the magneto-electric material unit of the present invention in a miniaturized wireless energy transmission system. .
  • the magnetic material unit of the present invention can be manually tuned by the aforementioned technical solution, and the frequency and the equivalent magnetic permeability of the magnetic material unit can be manually tuned, and the tuning range is wide.
  • Fig. 1 is a plan view showing the planar structure of an insulating dielectric plate of a low frequency magnetic material unit structure of the present invention.
  • FIG. 2 is a side view showing the structure of an insulating dielectric plate of the low frequency magnetic material unit structure of the present invention.
  • FIG 3 is a schematic plan view showing a planar structure of a metal wire provided on an insulating medium plate of the low frequency magnetic material unit structure of the present invention.
  • Fig. 4 is a side elevational view showing the structure of a low frequency magnetic material unit structure of the present invention provided with a metal wire on an insulating medium plate.
  • Fig. 5 is a plan view showing the planar structure of the magnetic mass unit structure assembly device of the present invention.
  • Fig. 6 is a side elevational view showing the structure of the magnetic mass unit structure assembly of the present invention.
  • Fig. 7 is a view showing a real part and an imaginary part and a frequency change of an equivalent magnetic permeability of a high-power electric vehicle radio energy transmission embodiment of the magnetic mass unit structure assembly apparatus of the present invention applied to an operating frequency of 85 KHz.
  • Insulating dielectric plate 10 metal wire 20; magnetic material unit structure 100; magnetic material unit structure assembly device 200.
  • FIGS. 1 through 7 To facilitate an understanding of the present invention, the following description will be made in conjunction with FIGS. 1 through 7 and the embodiments.
  • the present invention provides a low frequency magnetic material unit structure and a combination device thereof; wherein the low frequency magnetic material unit structure assembly device 200 is composed of a plurality of low frequency magnetic materials.
  • the Mete material unit structure 100 is combined.
  • the magnetic material unit structure 100 of the present invention includes, for example, an insulating dielectric plate 10 and metal wires 20 and lumped parameter electronic components (not shown) capable of supporting high power voltage and low frequency current above the watt level.
  • the metal wire 20 and the lumped parameter electronic component are preferably capable of supporting more than 100 watts of power.
  • the magnetic Mete material unit structure 100 of the present invention is formed into a deep sub-wavelength scale having a cell size smaller than 1/1000 of the electromagnetic wave vacuum wavelength, thereby realizing characteristics having a deep sub-wavelength characteristic.
  • the magnetic material unit structure 100 is a multi-turn structure, and the frequency tuning of the magnetic material unit structure 100 can be realized by loading the lumped parameter electronic components, and the metal wire 20 by loading the equivalent magnetic permeability.
  • the resonance of the magnetic material unit structure 100 is achieved; wherein the equivalent magnetic permeability of the magnetic material of the present invention has a specific response of less than 1 in the designed frequency range.
  • the insulating dielectric plate 10 includes a bottom plate 11 and a top plate 12 disposed oppositely, and a vertical wall 13 is connected between the bottom plate 11 and the top plate 12, and the vertical wall 13 is retracted at the bottom plate 11 and the bottom plate
  • the outer surface of the vertical wall 13 and the edge of the bottom plate 11 and the edge of the top plate 12 together define a winding space for forming the metal wire 20; the insulating dielectric plate 10 is on the inner surface of the vertical wall 13.
  • An empty window portion penetrating the bottom plate 11 and the top plate 12 is provided, and the hollow window portion includes a bottom opening 14 formed on the bottom plate 11 and a top opening 15 formed on the top plate 12.
  • the insulating dielectric plate 10 of the low-frequency magnetic material unit structure 100 of the present invention is formed into a three-dimensional rectangular structure.
  • the bottom plate 11 and the top plate 12 are formed into a square plate, and the vertical wall 13 is formed by four folded plates 131 having a flat L shape, and the corners of the folded plates 131 are formed into R angles.
  • the structure is such that the metal wire 20 is wrapped around the outer surface of the vertical wall 13; the end of the plate body of the folded plate 131 is connected to the bottom plate 11 and the top plate 12 without a connection. 16.
  • the insulating dielectric plate 10 is a structural substrate of the magnetic material unit structure 100 of the present invention.
  • the insulating dielectric plate 10 may be made of a material selected from the group consisting of organic glass, and the plexiglass material may preferably be polymethyl methacrylate (PMMA).
  • FIG. 3 and FIG. 4 a schematic view of a planar structure and a side view of the outer side of the insulating dielectric plate 10 of the low-frequency magnetic material unit structure 100 of the present invention is shown.
  • the metal wires 20 of the magnetic material unit structure 100 are multiple-tightly wound on the insulating dielectric plate 10 to support a high voltage of 220 V or higher and a large current of 5 A or more.
  • the metal wire 20 may be selected from a solid copper wire, a litz wire, or a copper tube.
  • the metal wire 20 of the magnetic material unit structure 100 of the present invention preferably uses a Litz wire, and the Litz wire may have a specification of 0.1 ⁇ 50 strands (a cross-sectional diameter of 0.1 mm per strand), and the Litz wire may be used.
  • the magnetic material unit structure 100 of the present invention is selected from a lumped parameter electronic component capable of withstanding a high voltage of 220 V or higher, and the lumped parameter electronic component is assembled by soldering to the end and end of the metal wire 20.
  • the lumped parameter electronic component may specifically be a metallized polyester film capacitor, and its specification may be 3.6 nF/1000V.
  • the invention obtains the magnetic material material structure tunable with frequency and equivalent magnetic permeability by changing the geometric parameters such as the total length, the number of turns of the metal wire 20, and the parameter values of the loaded lumped parameter electronic components. 100.
  • the frequency tuning range of the magnetic material unit structure 100 of the present invention may be, but not limited to, a range of 1 kHz to 100 MHz; the equivalent magnetic permeability tuning range of the magnetic material unit of the present invention may be However, it is not limited to the range of -100 to 100.
  • the tuning of the frequency and the equivalent magnetic permeability of the magnetic material unit of the present invention can be specifically realized by an electromagnetic equivalent parameter inversion method.
  • the metal wire 20 and the lumped parameter electronic component used in the magnetic material unit of the present invention can be selected according to a specific power level and its practical application scenario.
  • the foregoing embodiment is only used to illustrate the magnetic material of the present invention. Several of the specific application scenarios of the unit are not intended to limit the magnetic material unit of the present invention.
  • FIGS. 5 and 6 An embodiment of one of the two-dimensional array arrangement is shown in FIGS. 5 and 6.
  • Embodiment 1 A magnetic Mete material unit structure.
  • a magnetic material unit structure for high-power electric vehicle radio energy transmission at an operating frequency of 85 KHz which is composed of a plexiglass plate (insulating dielectric plate 10), a litz wire (metal wire 20), and a capacitor (lumped parameter) Electronic components).
  • the main steps of preparing the magnetic material unit structure include:
  • the Litz wire is subjected to multiple close winding on the side of the plexiglass plate, wound 79 ⁇ , and a capacitor is welded to the end and end of the Litz wire.
  • the plexiglass plate structure used in the magnetic material unit structure 100 of the present invention is as shown in FIG. 1 and is made of polymethyl methacrylate (PMMA).
  • the geometric parameters of the plexiglass plate are as follows: the length of the plate is 120 mm, the width of the plate is 120 mm, and the total thickness of the plate is 31 mm; wherein the thickness of the top plate and the bottom plate are both 3 mm, and the thickness of the metal wire 20 can be used to be 19 mm. And the middle portion of the plate is hollowed out to form an empty window portion having a side length of 76 mm and a thickness of 31 mm.
  • the Litz wire is a polyester wire covered wire with a polyurethane enameled wire as a core wire, and the specification of the Litz wire is 0.1 ⁇ 50 strands.
  • the geometric parameters of the Litz wire are as follows: the cross-sectional diameter of each wire is about 0.95 mm, the copper core cross-sectional area is about 0.393 mm 2 ; and the total length of the litz wire used in the embodiment 1 of the present invention is about It is 34m.
  • the capacitor has a capacitance of 3.6 nF and can withstand a high voltage of 220 V or higher and a metallized polyester film in-line capacitor.
  • Embodiment 2 A magnetic Mete material unit structure assembly device composed of the magnetic Mete material unit structure of Embodiment 1.
  • FIG. 6 shows a 5 ⁇ 5 array low frequency magnetic material unit structure assembly device formed by periodically replicating the magnetic material cell structure of the first embodiment in a two-dimensional plane; Wherein, the total length and total width of the low-frequency magnetic material unit structure assembly device are both 600 mm and the total thickness is 31 mm.
  • the variation of the effective magnetic permeability measured with the frequency measured by the low-frequency magnetic material unit structure assembly of the present invention is shown.
  • the experimental frequency range is from 60 kHz to 90 kHz.
  • the transmitting coil and the receiving coil are copper wire wound single-turn square coils of No. 25 (2.5 mm in diameter), the side length is 600 mm, the distance between the two coils is 50 mm, and the magnetic material is Loaded on the transmitting coil.
  • the present invention is suitable for achieving the objects of the present invention and attaining the advantages as described above and its inherent advantages.
  • the present invention has been described, illustrated, and defined by reference to the particular embodiments of the invention, which are not intended to limit the invention.
  • the described embodiments of the invention are merely exemplary and do not cover the entire invention. Therefore, the present invention is to be considered as limited only by the spirit and scope of the appended claims.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

L'invention concerne un corps structural d'unité de métamatériau magnétique basse fréquence (100) et un dispositif de combinaison (200) associé. À l'aide de procédés d'enroulement de multiples spires de fils métalliques (20) et de leur combinaison avec un élément électronique localisé, le corps structural d'unité de métamatériau magnétique (100) est formé à une échelle de sous-longueur d'onde profonde, de sorte que le corps structural d'unité de métamatériau magnétique (100) règle la fréquence en chargeant l'élément électronique localisé, et le corps structural d'unité de métamatériau magnétique (100) résonne au moyen des fils métalliques (20) présentant une perméabilité équivalente. Le problème technique selon lequel le niveau de puissance qui peut être pris en charge lors de l'utilisation du métamatériau magnétique n'est pas élevé est résolu, et l'objectif visant à utiliser le métamatériau magnétique pour transférer une puissance sans fil basse fréquence présentant une puissance élevée supérieure à 100 watts est réalisé.
PCT/CN2018/073193 2018-01-18 2018-01-18 Corps structural d'unité de métamatériau magnétique basse fréquence et dispositif de combinaison associé WO2019140587A1 (fr)

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PCT/CN2018/073193 WO2019140587A1 (fr) 2018-01-18 2018-01-18 Corps structural d'unité de métamatériau magnétique basse fréquence et dispositif de combinaison associé

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PCT/CN2018/073193 WO2019140587A1 (fr) 2018-01-18 2018-01-18 Corps structural d'unité de métamatériau magnétique basse fréquence et dispositif de combinaison associé

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102738591A (zh) * 2011-04-12 2012-10-17 深圳光启高等理工研究院 一种磁谐振超材料
US20130207737A1 (en) * 2012-02-13 2013-08-15 University Of North Carolina At Charlotte Wideband negative-permittivity and negative-permeability metamaterials utilizing non-foster elements
CN103296431A (zh) * 2012-02-29 2013-09-11 深圳光启创新技术有限公司 一种负磁导率超材料
CN103296781A (zh) * 2012-03-01 2013-09-11 深圳光启创新技术有限公司 一种无线能量传输系统
CN106450784A (zh) * 2016-11-16 2017-02-22 华中科技大学 一种低频负磁导率的超材料

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102738591A (zh) * 2011-04-12 2012-10-17 深圳光启高等理工研究院 一种磁谐振超材料
US20130207737A1 (en) * 2012-02-13 2013-08-15 University Of North Carolina At Charlotte Wideband negative-permittivity and negative-permeability metamaterials utilizing non-foster elements
CN103296431A (zh) * 2012-02-29 2013-09-11 深圳光启创新技术有限公司 一种负磁导率超材料
CN103296781A (zh) * 2012-03-01 2013-09-11 深圳光启创新技术有限公司 一种无线能量传输系统
CN106450784A (zh) * 2016-11-16 2017-02-22 华中科技大学 一种低频负磁导率的超材料

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