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Wireless charging system receiving coil positioning method based on mutual inductance disturbance

A technology of receiving coils and wireless charging, applied in circuit devices, electrical components, etc., can solve the problems of increasing volume and inability to transmit electric energy, and achieve the effect of reducing volume and realizing two-dimensional positioning.

Active Publication Date: 2020-11-17
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the magnetic dipole model requires that the distance between the coils is much greater than the radius of the coils, so electric energy cannot be transmitted while positioning, and an additional voltage detection device needs to be added to the implant device, which undoubtedly increases its size.

Method used

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  • Wireless charging system receiving coil positioning method based on mutual inductance disturbance
  • Wireless charging system receiving coil positioning method based on mutual inductance disturbance
  • Wireless charging system receiving coil positioning method based on mutual inductance disturbance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0065] In order to verify the effectiveness of the scheme of the present invention, get the resonant frequency f=200kHz, the winding mode is close winding, the turn spacing d=2a, and a is the wire radius, and carry out following simulation in ANSYS simulation software, as Figure 4 shown.

[0066] Firstly, the parameters of the three coils should be determined, as shown in Table 1:

[0067] Table 1 Coil parameter list

[0068]

[0069] Set the coordinates of the transmitting coil to (0, 0, 0), and set the relay coil in three positions (5, 0, 8), (-5, 0, 8) and (0, 5, 8) in turn, and then set the receiving The coils are respectively set at (0, 0, 10) and (10, 10, 10) two positions for simulation. Coordinates are in centimeters. The simulation results are shown in Table 2.

[0070] Table 2 Simulation results

[0071]

[0072] As can be seen from Table 2, when the receiving coil is at the position (0,0,10), according to the positioning method described in the solution ...

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Abstract

The invention discloses a wireless charging system receiving coil positioning method based on mutual inductance disturbance, and the method comprises the steps: firstly building a three-coil wirelesscharging system equivalent circuit model comprising a relay coil, and calculating the expression of each loop current; then establishing a mutual inductance relational expression between the planar spiral coils at any spatial position; changing the position of the repeating coil and measuring the current values of the transmitting coil and the repeating coil at the corresponding positions, and repeating for three times; and finally, calculating the distance between the receiving coil and the repeating coil according to the current values of the transmitting coil and the repeating coil, and determining the position of the receiving coil according to a three-point positioning principle. The two-dimensional positioning of the receiving coil can be realized only by measuring the current of thetransmitting coil and the relay coil without measuring the electrical parameters of the receiving coil (reducing the volume of the receiving coil), and meanwhile, the wireless transmission of electric energy can be carried out.

Description

technical field [0001] The invention relates to wireless power transmission technology, in particular to a method for positioning a receiving coil of a wireless charging system based on mutual inductance disturbance. Background technique [0002] In recent years, with the development of MEMS technology, microelectronics technology and new material technology, various capsule non-invasive diagnosis systems have appeared, such as capsule endoscopy, gastrointestinal pressure, pH value detection capsule, gastrointestinal temperature record Capsules etc. Providing safe, convenient, efficient and reliable power supply for implanted electronic devices, as well as the positioning and tracking of implanted devices are key issues that need to be solved urgently in implanted medical systems. Affected by human tissue, traditional positioning technologies such as radio frequency positioning technology have relatively low positioning accuracy, while image-based positioning technologies s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/90H02J50/50H02J50/10H02J50/12
CPCH02J50/90H02J50/50H02J50/10H02J50/12
Inventor 闻枫楚晓虎李强李睿刘力荆凡胜成星辰韩晨
Owner NANJING UNIV OF SCI & TECH