A method and apparatus for wireless charging

A wireless charging and radio wave technology, applied in the electromagnetic field, can solve problems such as adverse effects on human health, lack of uniform standards, and low transmission efficiency, and achieve the effects of increasing the distance of wireless charging, being easy to put into use, and having a wide application prospect

Inactive Publication Date: 2019-01-04
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the transmission efficiency is low, and the use of high frequency bands will cause adverse effects on human health
In addition, there is currently no uniform standard in the microwave frequency band, and the compatibility is low

Method used

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  • A method and apparatus for wireless charging
  • A method and apparatus for wireless charging
  • A method and apparatus for wireless charging

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] This embodiment simulates the effect of radio wave charging when an electromagnetic cavity is applied only at the transmit and receive coils.

[0058] The inner and outer radii of the transmitting coil 3 and the receiving coil 4 are both 3.3cm and 3.6cm, and the inductance element is 66nH, and the coils are fixed on a PTFE plate with a thickness of 0.2cm and 10cm×10cm. The transmission frequency is taken as the resonant frequency of the LC resonant circuit, which is 915MHz, and the transmitting coil and the receiving coil are placed face to face with a distance of 16cm. Based on the numerical simulation software COMSOL Multiphysics, it can be simulated that the charging efficiency of radio waves at this time is only 0.23, where , the charging efficiency is represented by the ratio of the induced voltage of the receiving coil to the excitation voltage of the transmitting coil.

[0059] The electromagnetic wave working mode is modulated into a transverse electromagnetic w...

Embodiment 2

[0064] This embodiment simulates the charging effect when the dielectric plate 5 is provided only during radio wave transmission.

[0065] Get the same transmitting coil 3 and receiving coil 4 as in Embodiment 1, and insert a dielectric plate 5 with a three-layer symmetrical structure between them, and the dielectric plate 5 can be arranged on the output end face of the transmitting coil 3 and / or on the receiving coil 4 on the receiving end. According to the principle of Fabry-Perot resonance and combined with the coil parameters mentioned above, the size of each dielectric plate is 10cm×10cm, the thickness is 1cm, and the relative dielectric properties of the first and third layers of dielectric materials are taken The constant is 50, and the relative permittivity of the intermediate dielectric material is 60. At this time, the charging efficiency of radio waves obtained through simulation is 0.49, which is also much higher than the original charging efficiency (0.23).

[00...

Embodiment 3

[0068] This embodiment simulates the charging effect when the first electromagnetic resonant cavity 1 , the second electromagnetic resonant cavity 2 and the dielectric plate 5 are applied simultaneously.

[0069] Get the same pair of transmitting coils 3 and receiving coils 4 in Example 1, consider the relationship between the charging efficiency and the thickness of the electromagnetic resonant cavity, get the thickness of the first electromagnetic resonant cavity 1 and the second electromagnetic resonant cavity 2 to be 13cm, and the dielectric The size parameters of the plate are the same as those in Example 2. At this time, the charging efficiency obtained by simulation can reach 0.89, and the corresponding electric field distribution diagram is as follows Figure 7 As shown, it can be seen that the electric field near the receiving coil is significantly enhanced.

[0070] The wireless charging method of the present invention uses radio wave technology, by applying an elect...

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PUM

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Abstract

A method for wireless charging is disclosed. By Use of radio wave technology, by applying an electromagnetic resonant cavity at the transmitting coil and/or the receiving coil to enhance the transmitting energy and/or the receiving energy of the radio wave, and inserting two kinds of dielectric plates of different materials in the transmission process to carry on the relay enhancement to the radiowave, so as to reduce the energy loss and other physical influence caused by the beam diffusion in the microwave propagation process, increase the wireless charging distance, and improve the efficiency of the long-distance wireless charging. The invention also discloses a wireless charging device, Not only can it be used in small household electronic equipments, but also can be used in high-powerequipments such as electric vehicles. Moreover, the electromagnetic resonant cavity in the wireless charging device is simple to manufacture and the material of the dielectric plate is easy to prepare, so it is easy to be put into use in actual production and has wide application prospects.

Description

technical field [0001] The invention relates to the field of electromagnetic technology, in particular to a wireless charging method and device. Background technique [0002] Since Tesla proposed the concept of wireless charging, with the maturity of radio frequency technology and the development of electronic information industry, universities, scientific research institutes, and high-tech enterprises have greatly increased their investment in the field of wireless charging. Freed from the space constraints of charging cables and the potential leakage of exposed connectors, wireless charging technology has brought great convenience to users in many aspects, including medical equipment, small household electronic equipment, and military aerospace. However, there are still huge challenges in terms of charging distance, charging speed and real-time charging. [0003] There are three main types of existing wireless charging technologies: one is electromagnetic induction, the o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/20H02J50/50H02J50/70H02J7/00
CPCH02J7/025H02J50/20H02J50/50H02J50/70
Inventor 张敏玥何海南罗杰赖耘
Owner SUZHOU UNIV
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