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Wireless charging system

A technology of wireless charging and electrode plates, applied in the direction of current collectors, electric vehicles, electrical components, etc., can solve the problems of high cost, large coil size, low transmission efficiency, etc., and achieve the effect of improving efficiency and increasing power capacity

Inactive Publication Date: 2012-06-20
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the coil size used in the near-field magnetic field coupling method is large and the transmission efficiency is low; the cost of the far-field electromagnetic wave transmission method is high, and it is greatly affected by the external environment
[0003] After searching the literature of the prior art, it was found that in June 2007, André Kurs et al. published "Wireless Power Transfer via Strongly Coupled Magnetic Resonances" in Science (Microwave and Optical Technology Letters) volume 317 "It is proposed that power transmission over a distance of more than 2m can be achieved at 10.56MHz, and the transmission efficiency is 40%. However, the diameter of the two coils of the transceiver reaches 60cm, the efficiency is low, and the working distance is short, which is difficult to be used for charging small wireless terminals in practice.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0023] like figure 1 , figure 2 As shown, this embodiment includes: a transmitting signal source 1, a first electrode plate 2 of a flat capacitor, a second electrode plate 3 of a flat capacitor, an energy storage module 4, a coaxial cable 5 at a receiving end, a receiving coil 6, a transmitting coil 7, and a transmitting coil 6. end coaxial cable8.

[0024] Transmitter 1 is connected with transmitting end coaxial cable 8, and the inner conductor of the other end of transmitting end coaxial cable 8 is connected with a joint of transmitting coil 7, and the outer conductor of transmitting end coaxial cable 8 is connected with another joint of transmitting coil 7 connect.

[0025] The inner conductor of the coaxial cable 8 at the transmitting end is also connected to the first electrode plate 2 of the flat capacitor.

[0026] The outer conductor of the coaxial cable 8 at the transmitting end is grounded.

[0027] The energy storage module 4 is connected to the receiving end c...

Embodiment 2

[0033] The principle of this embodiment is similar to Embodiment 1, such as image 3 As shown, the main improvement is: the first electrode plate 2 of the parallel plate capacitor and the transmitting coil 7 are combined together, and a spiral slit is opened on the first electrode plate 2 of the parallel plate capacitor. Similarly, the second electrode plate 3 of the parallel plate capacitor and the receiving coil 6 are combined together, and at the same time, a spiral slit is opened on the second electrode plate 3 of the parallel plate capacitor. This ensures that the coupled magnetic field lines between the transmitting coil 7 and the receiving coil 6 can pass through the gap to form closed magnetic field lines, and at the same time, the first electrode plate 2 of the parallel plate capacitor and the second electrode plate 3 of the parallel plate capacitor have sufficient area between them An induced electric field is formed between them.

[0034] Simulation results show th...

Embodiment 3

[0036] The principle of this embodiment is similar to Embodiment 1, such as Figure 4 As shown, the main improvement is: the first electrode plate 2 of the parallel plate capacitor and the transmitting coil 7 are combined together, and at the same time, a mesh circular slit is opened on the first electrode plate 2 of the parallel plate capacitor. Similarly, the second electrode plate 3 of the parallel-plate capacitor and the receiving coil 6 are combined together, and at the same time, a mesh-shaped circular gap is opened on the second electrode plate 3 of the parallel-plate capacitor. This ensures that the coupled magnetic field lines between the transmitting coil 7 and the receiving coil 6 can pass through the gap to form closed magnetic field lines, and at the same time, the first electrode plate 2 of the parallel plate capacitor and the second electrode plate 3 of the parallel plate capacitor have sufficient area between them An induced electric field is formed between the...

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PUM

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Abstract

A wireless charging system comprises a transmitter. The transmitter is connected with an inner conductor and an outer conductor of a transmitting-end coaxial cable, an inner conductor at the other end of the transmitting-end coaxial cable is respectively connected with one end of a transmitting coil and a first electrode plate of a plate capacitor, and the outer conductor of the transmitting-end coaxial cable is connected with the other end of the transmitting coil and grounded. An energy storage module is connected with an inner conductor and an outer conductor of a receiving-end coaxial cable, an inner conductor at the other end of the receiving-end coaxial cable is respectively connected with one end of a receiving coil and a second electrode plate of the plate capacitor, and the outer conductor of the receiving-end coaxial cable is connected with the other end of the receiving coil and grounded. Electromagnetic energy is transmitted between the transmitting end and the receiving end by means of magnetic field coupling between the coils and simultaneously is transmitted by means of induced electric field between the electrode plates of the plate capacitor, and the two modes are used simultaneously, so that wireless energy transmission efficiency is improved, the wireless charging system is simple in structure and can be small-sized, and wireless energy transmission and wireless charging can be efficiently realized.

Description

technical field [0001] The present invention relates to the technical field of wireless energy transmission, in particular to a wireless charging system. Background technique [0002] In the prior art, wireless charging adopts a method of magnetic field coupling in the near field, or a method of transmitting-transmitting-receiving electromagnetic waves between transceiver antennas in the far field. However, the coil size used in the near-field magnetic field coupling method is large and the transmission efficiency is low; the cost of the far-field electromagnetic wave transmission method is high, and it is greatly affected by the external environment. [0003] After searching the literature of the prior art, it was found that in June 2007, André Kurs et al. published "Wireless Power Transfer via Strongly Coupled Magnetic Resonances" in Science (Microwave and Optical Technology Letters) volume 317 "It is proposed that power transmission over a distance of more than 2m can be...

Claims

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Application Information

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IPC IPC(8): H02J7/02H02J50/10
Inventor 金泽谦耿军平
Owner SHANGHAI JIAO TONG UNIV