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Radio energy transmission system tuning feedback control method considering dynamic performance

A technology of wireless power transmission and dynamic performance, applied in circuit devices, electrical components, etc., can solve problems such as damage, low robustness, and delay, achieve high transmission efficiency and power, achieve continuity, and ensure stability. Effect

Active Publication Date: 2018-03-23
WUHAN UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its main disadvantages are: 1) The robust performance is low; 2) The stability of the system during the tuning process cannot be guaranteed, and the electronic devices of the system will be damaged if the overshoot is too high during the tuning process; 3) The tuning control process is discontinuous, and there is a delay. Time

Method used

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  • Radio energy transmission system tuning feedback control method considering dynamic performance
  • Radio energy transmission system tuning feedback control method considering dynamic performance
  • Radio energy transmission system tuning feedback control method considering dynamic performance

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Embodiment Construction

[0029] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] In magnetically coupled wireless power transfer systems, energy transfer efficiency and power are the most important properties. Taking the two-coil system as an example, when both the transmitting end and the receiving end of the system work in the resonance state, the system obtains the maximum transmission efficiency and the maximum transmission power under the maximum transmission efficiency. Usually, the resonance state of the system is related to the operating frequency and the resonance network parameters. When the operating frequency is consistent with the natural resonance frequency of the system transmitting end and receiving end, the system transmitting end and receiving end resonate at the same time.

[0031] In order to ensure better robustness and dynamic performance, it is very important to analyze the dynamic performance of the s...

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Abstract

The invention relates to a radio energy transmission tuning control technology, in particular to a radio energy transmission system tuning feedback control method considering dynamic performance. Themethod includes the steps of obtaining the phase nonlinear differential equation model of the transmitting end and the receiving end of a system through analysis by utilizing a coupling mode theory and a circuit theory; utilizing a small signal linearization method to linearize a phase nonlinear differential equation model nearby a system resonance point, and analyzing the closed-loop dynamic performance of the system; taking the linear model as a controlled object and the phase value of the output voltage of an inverter circuit of the system as a reference phase, and forming a system tuning closed-loop feedback control loop by using the phase value of the transmitting end and the phase difference value of the transmitting end and the receiving end as the given values of the system transmitting end and the receiving end control loops when the system works in a resonance state. The control method can quickly and accurately control a magnetic coupling wireless energy transmission systemto work under the working states of high transmission efficiency and power, and has good robustness for detuning disturbance.

Description

technical field [0001] The invention belongs to the technical field of wireless power transmission tuning control, and in particular relates to a tuning feedback control method of a wireless power transmission system considering dynamic performance. Background technique [0002] The application of magnetic coupling wireless power transmission technology in many fields solves the problem that power transmission relies on metal media. As a special wireless power source, the transmission efficiency and power stability of the system have attracted much attention. However, in practical applications, the parameters of the system will deviate to varying degrees due to factors such as device manufacturing accuracy, material heating and aging, and environmental interference. The deviation of this parameter will detune the system, reducing the transmission efficiency and power. [0003] In order to make the system operate with higher transmission efficiency and power and maintain be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/12H02J50/80
CPCH02J50/12H02J50/80
Inventor 周洪陈诚邓其军胡文山罗新
Owner WUHAN UNIV
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