Wireless energy transmission device

A wireless energy transmission and transmitting device technology, applied in circuit devices, electrical components, electromagnetic wave systems, etc., can solve the problems of difficulty in manufacturing and use, affecting transmission efficiency, etc., to achieve high transmission efficiency, good transmission efficiency, and suitable for batch manufacturing and promotion effect

Active Publication Date: 2012-02-08
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similarly, a certain distance should be kept between the receiving loop and the loading loop, and the change of the distance will greatly affect the transmission efficiency
Therefore, this technology has certain difficulty and inconvenience in manufacture and use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] see figure 1 , the present invention includes a power source 1 , a transmitting device, a receiving device and a receiving load 6 . In this embodiment, the receiving load 6 can be a device to be powered and / or a charging device, such as a pure resistance or a reactive component, a device that directly consumes power such as a light bulb, or a device with stored energy such as a battery, or While consuming and storing, such as a computer or mobile phone with a rechargeable battery; the power source 1 uses a radio frequency power supply.

[0082] Wherein, the transmitting device includes a transmitting coil 3 and an efficiency-adjusting transmitting network 2 , the transmitting coil 3 is connected to the Port2 port of the efficiency-adjusting transmitting network 2 , and the power source 1 is connected to the Port1 port of the efficiency-adjusting transmitting network 2 .

[0083] The receiving device includes a receiving coil 4 and an efficiency adjusting receiving netw...

Embodiment 2

[0186] In Embodiment 1, the transmitting coil 3 and the receiving coil 4 are equal. In order to illustrate that the entire wireless energy transmission network is also applicable to asymmetrical situations, in this embodiment, the transmitting coil 3 and the receiving coil 4 are not equal in size.

[0187] The specific circuit parameters are: L t = 16μH, Lr = 1.4μH, R pt = 1ohm, R pr = 0.2ohm, R L =100ohm, R s =26ohm, k=0.05, f=4Mhz.

[0188] According to the above formula, C1=71pF, C2=28pF, C3=946pF, C4=184pF. Through numerical simulation, the relationship between efficiency and coupling coefficient k can be obtained, such as Figure 33 As shown, it can be seen that when k=0.05, the transmission efficiency reaches 85.24%. As the distance increases, k increases, and the transmission efficiency further improves. When k=0.3, it reaches 91.85%. In addition, it can be seen that when k When >0.01, the transmission efficiency is always greater than 30%.

[0189] The present i...

Embodiment 3

[0191] Example 1, R eqr > R L and R eqt s , the efficiency adjustment receiving network 5 adopts a CL2 type efficiency adjustment network, the efficiency adjustment transmission network 2 adopts an AL1 type efficiency adjustment network, and the entire wireless energy transmission device works in states A-C.

[0192] see Figure 35 As shown, there is a power source 1, the power source optimal load resistance R s = 50 ohms, receiving load R L =0.5 ohm, the present invention sets operating frequency as f=10MHz, then the best equivalent receiving impedance Z of efficiency can be obtained according to the method provided by the present invention eqr and the best efficiency equivalent emission impedance Z eqt , and according to the efficiency formula provided by the present invention, the estimated maximum efficiency is 81.79%, and the specific parameters are as shown in Table 2,

[0193]

[0194] Table 2

[0195] In order to achieve maximum efficiency transmission, the ...

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Abstract

The invention discloses a wireless energy transmission device which comprises a power source, a transmitting device and a receiving device; the transmitting device comprises a transmitting coil and an efficiency regulation transmitting network used for regulating the efficiency optimal equivalent transmission impedance Zeqt at the two ends of the transmitting coil to the optimal load impedance Zsof the power source; one end of the efficiency regulation transmitting network is connected with the transmitting coil, and the other end of the efficiency regulation transmitting network is connected with the power source; the receiving device comprises a receiving coil which performs energy coupling through an alternating electromagnetic field and the transmitting coil and an efficiency regulation receiving network used for regulating the received load impedance ZL to the efficiency optimal equivalent receiving impedance Zeqr at the two ends of the receiving coil; one end of the efficiency regulation receiving network is connected with the receiving coil, and the other end of the efficiency regulation receiving network is connected with the load. According to the transmission device disclosed by the invention, the transmission energy is not absorbed by the surrounding substances on the non-resonant frequency points, so that the transmission device has good transmission efficiency; moreover, the transmission device is applied to the power source with the load and output load in any sizes, and can keep the highest and optimal transmission efficiency at any distances.

Description

technical field [0001] The present invention relates to an energy transmission device, in particular to a wireless energy transmission device. Background technique [0002] At present, the most widely used technology for wireless energy transmission is magnetic induction technology, which is also the technology used in the current Qi technical standard of the International Wireless Charging Alliance. Its working principle is Faraday's law of electromagnetic induction, and energy is transferred between two coils through electromagnetic induction transfer. The general principle is: when the alternating current passes through the coil, an alternating magnetic field will be generated; and the generated alternating magnetic field will form an alternating electric field, and then a voltage will be formed on the coil; with the voltage, a current will be generated, which can be The device to be charged is charged. [0003] The advantage of this magnetic induction technology is tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J17/00H02J50/12
Inventor 崔铁军陈林辉刘硕周永春陈锦周小阳杨艳
Owner SOUTHEAST UNIV
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