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Wireless charging device with dynamic frequency modulation function and metasurface structure, and application of wireless charging device

A wireless charging and super-surface technology, applied in current collectors, electrical components, electric vehicles, etc., can solve problems such as poor convergence effects, and achieve the effects of easy acquisition, easy dynamic adjustment, and simple design structure

Active Publication Date: 2018-03-06
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The currently designed metasurface structures are basically in the form of planes, which can only be adjusted to achieve convergence and conversion of incident waves in the front direction, and the convergence effect is poor.

Method used

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  • Wireless charging device with dynamic frequency modulation function and metasurface structure, and application of wireless charging device
  • Wireless charging device with dynamic frequency modulation function and metasurface structure, and application of wireless charging device
  • Wireless charging device with dynamic frequency modulation function and metasurface structure, and application of wireless charging device

Examples

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Effect test

Embodiment 1

[0058] Embodiment 1: as figure 2 Shown is a schematic diagram of wireless charging with a radially distributed metasurface structure, which has two layers: a liquid metal metasurface structure layer 1 and a grounded metal layer 3 . When the electromagnetic wave is incident on the metasurface, the incident plane wave is converted into a series of surface waves through the phase gradient of the metasurface, which propagate along the metasurface and finally converge at the center of the metasurface. Distribute the liquid metal metasurface structure unit 8 along the radial direction, design the phase of the gradient distribution according to the generalized Snell reflection law, and adjust the structural parameters of the liquid metal structure unit 8 by controlling the magnitude of the applied voltage or changing the pressure through an air pump to realize the phase distribution regulation (phase gradient).

[0059] Such as image 3 As shown, according to the generalized reflec...

Embodiment 2

[0064] Embodiment 2: as Figure 5 Shown is a schematic diagram of the wireless charging of the metasurface structure in which the metasurface unit structures are distributed along the circumference. When the electromagnetic wave is incident on the metasurface structure, the phase gradient is constructed through the unit structure with high transmittance, so as to realize the reconstruction of the transmitted field and achieve the effect of concentrating the electromagnetic wave.

[0065] Based on the reciprocity of the electromagnetic metasurface, the design is reversed here, assuming that a cylindrical wave source is placed in the center of the metasurface, and the metasurface unit structure is perpendicular to the radius, which can be regarded as normal incidence. According to the principle of phase compensation, the formula is derived: Φ=k 0 (r-rcosθ) determines the phase that needs to be compensated for the cell structure at each location. Among them, Φ is the phase that...

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Abstract

The invention relates to a wireless charging device with a dynamic frequency modulation function and a metasurface structure, and an application of the wireless charging device. The wireless chargingdevice comprises an energy conversion unit and a functional layer; the functional layer comprises a liquid-state metal metasurface structure layer and is distributed in the circumferential direction by taking the energy conversion unit as the axis to form a metasurface in circumferential distribution; or the functional layer also comprises a grounding metal layer; the functional layer is distributed in the radial direction by taking the energy conversion unit as the center of a circle to form a metasurface in radial distribution; the liquid-state metal metasurface structure layer comprises a dielectric substrate and a plurality of metasurface structural units arranged on the dielectric substrate; each metasurface structural unit comprises a liquid-state metal collector arranged on the dielectric substrate, an electrolyte solution collector, and an annular metasurface structural unit channel; and the liquid-state metal collector and the electrolyte solution collector are uniformly distributed and connected with the metasurface structural unit channel. In wireless charging, by virtue of the liquid-state metal metasurface structure, dynamic phase modulation and high focusing effect onwave source can be achieved.

Description

technical field [0001] The invention relates to the field of wireless charging, in particular to a wireless charging device with a dynamic frequency-adjustable metasurface structure and its application. Background technique [0002] Wireless charging technology refers to the technology of non-contact power transmission through electromagnetic induction, electromagnetic resonance, radio frequency, microwave, laser, etc. It is regarded as a cutting-edge technology with basic application significance. , small robots, portable smart devices, and Internet of Things devices have huge application value in charging. [0003] One of the main challenges facing the current wireless charging technology is how to obtain high transmission efficiency over a reasonable distance. Now the most mature is the electromagnetic induction wireless charging technology. The energy transfer in this way is mainly carried out at a lower frequency through the non-radiative magnetic field coupled between...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02J50/00H02J50/20
CPCH02J7/025H02J50/00H02J50/20
Inventor 梁庆宣郭建勇程勇江子杰吴宝东钱泓涯
Owner XI AN JIAOTONG UNIV
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