Method for extracting coupling inductance of wireless power transmission link

A technology of wireless power transmission and coupled inductance, applied in the direction of electrical components, circuit devices, etc., can solve the problems of simulator grid division and simulation taking a long time, inability to obtain intuitive analytical equations, and high computational complexity of coupled inductance , to improve design optimization efficiency, reduce calculation time and design complexity, and overcome excessive simulation time

Inactive Publication Date: 2020-11-20
NINGBO UNIV
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Problems solved by technology

[0003] At present, there are two main methods of researching coil coupling inductance: one method is to use the commercial three-dimensional full-wave electromagnetic simulation software HFSS for simulation calculation, HFSS provides an accurate field solver, through the finite element analysis of the coil structure, it can be calculated The full-wave electromagnetic field and coupled inductance of the coil are obtained, but the mesh division and simulation of the simulator take a long time, prolonging the optimization time of the circuit design; another method is to use elliptic integral and Bessel function to analyze the electromagnetic field distribution between the coils Perform analysis and calculation to obtain the numerical analysis results of coupled inductors, but this method is a numerical method, and cannot obtain intuitive analytical equations, and the calculation complexity of coupled inductors is high

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  • Method for extracting coupling inductance of wireless power transmission link
  • Method for extracting coupling inductance of wireless power transmission link
  • Method for extracting coupling inductance of wireless power transmission link

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Experimental program
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Embodiment 1

[0036] The method for extracting the coupled inductance of the wireless power transmission link in Embodiment 1 includes the following steps:

[0037] S1: Read the working environment file of the wireless power transmission link, and record the type and specification of the circular receiving coil and transmitting coil in the file;

[0038] S2: According to the type and specification of the receiving coil and the transmitting coil, obtain the size parameters and material parameters of the receiving coil and the transmitting coil, and store them as the design parameters of the receiving coil and the transmitting coil, wherein the design parameters of the receiving coil and the transmitting coil include the coil Number of turns, inner diameter, wire width, wire spacing, wire thickness and wire conductivity;

[0039] S3: For the structural schematic diagram of the receiving coil and the transmitting coil of the wireless power transmission link in Embodiment 1, see figure 1 , dur...

Embodiment 2

[0056] The method for extracting the coupled inductance of the wireless power transmission link in Embodiment 2 is different from Embodiment 1 in that the receiving coil and the transmitting coil in Embodiment 2 are both square, and the inner side lengths of the square transmitting coil and receiving coil are respectively Instead of the inner diameter in Example 1. In embodiment 2, the inner side length of the transmitting coil is 2r 1 , the inner side length of the receiving coil is 2r 2 , coefficient ρ=(4 / π) 1+r2 / r1 .

[0057] Using the extraction method of Embodiment 1 and Embodiment 2, the coupling inductance between the circular receiving coil and the transmitting coil and the coupling inductance between the square receiving coil and the transmitting coil are calculated respectively, and compared with the commercial HFSS full-wave electromagnetic The simulation results of the simulation software are compared.

[0058] figure 2 is the coupled inductance curve of the ...

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Abstract

The invention discloses a method for extracting coupling inductance of a wireless power transmission link. According to the method, by establishing a coupling inductance analysis model used for wireless power transmission and having concise in form and high calculation precision, the coupling inductance between a receiving coil and a transmitting coil of a wireless power link in different workingstates can be quickly and accurately analyzed and extracted, and the analysis result precision is basically consistent with the simulation result precision of commercial HFSS full-wave electromagneticsimulation software while the calculation time and the design complexity are remarkably reduced, so that the defects that existing HFSS full-wave electromagnetic simulation software is too long in simulation time and low in execution efficiency are overcome, the design optimization efficiency of the wireless power transmission link can be improved, and technical developers are guided to quickly design and optimize the wireless power transmission link in real time. According to the invention, the coupling inductance of receiving coils and transmitting coils of wireless power transmission linkswith different shapes and different turns in any working state such as horizontal deviation, angle deviation and the like can be rapidly extracted, and the application range is wide.

Description

technical field [0001] The invention relates to the technical field of wireless power transmission, in particular to a method for extracting coupling inductance of a wireless power transmission link. Background technique [0002] Wireless power transmission is an electromagnetic transmission technology that transmits signals through the alternating magnetic field between the transmitting coil and the receiving coil. It has the advantages of good safety, high reliability, strong environmental adaptability and flexible access methods. It is suitable for medical implants Equipment energy supply in working environments such as body, consumer electronics, and electric vehicles. The coupled inductance of the transceiver coil is a key factor affecting the performance of the wireless power transmission link, which directly determines the transmission power and transmission efficiency of the wireless power transmission link. In actual work, horizontal and angular offsets inevitably ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/10H02J50/70
CPCH02J50/10H02J50/70
Inventor 钱科芳钱利波易泽鑫李敏华朱樟明夏银水
Owner NINGBO UNIV
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