基于电场耦合的电能信号并行传输系统串扰抑制方法

doi:10.19595/j.cnki.1000-6753.tces.230058

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摘要

针对较大功率电场耦合无线电能传输系统信号双向高速传输的需求,本文提出一种基于部分能量通道的电能与信号并行传输系统的串扰抑制方法。通过对所提出的系统拓扑分析,给出了电能传输增益表达式与电能串扰增益表达式,并分析了阻波电路参数变化对电能串扰增益的影响;基于交流阻抗法及香农定理分别给出了信号传输增益及信道容量表达式,分析了信号支路参数对信道容量的影响;在综合考虑信号传输增益、信道容量及阻波电路参数敏感性条件下,给出了系统信号支路参数的设计方法。该方法能保证系统在较大功率下降低电能串扰,保障信号稳定传输,实现了信号的双向高速传输。通过仿真与实验验证了所提出的拓扑和参数设计方法的有效性。搭建的实验装置实现了传输530.4W的电能,23.28Mbit/s信号正向传输速度和24.2428Mbit/s信号反向传输速度。

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关键词 ：电场耦合式无线电能传输, 信号双向传输, 电能串扰, 参数设计

Abstract：

In practical engineering application scenarios, in order to achieve better power transmission effect, achieve closed-loop control and improve system robustness and system efficiency, the Electric-field Coupled Wireless Power Transfer (EC-WPT) system requires real-time communication between the power transmitter and the load receiver. In addition, in some applications, the power transmitter needs to transmit some information such as control instructions to the power receiver, and the power receiver also needs to transmit a large amount of data to the power transmitter, such as underwater robots, drones and other wireless power supply systems. At present, many scholars have carried out research on the parallel transmission of electric energy and signal in EC-WPT system and put forward some solutions. However, there are few studies on the bidirectional high-speed transmission of signals in EC-WPT system with large power transmission.
This paper proposes a crosstalk suppression method with LC resistance wave circuit for parallel transmission system of electric energy and signal. Based on the AC impedance analysis method, the expressions of power transmission gain, power crosstalk gain and signal transmission gain are given. By analyzing the power transmission model and the power crosstalk model, the parallel LC resistance wave circuit is proposed to isolate the crosstalk of the energy to the signal, and the influence of the parameter change of the resistance wave circuit on the power crosstalk gain is analyzed. According to the expression of power crosstalk gain and signal transmission gain, the channel capacity model is established by using Shannon theorem, and the influence of signal branch parameters on channel capacity is analyzed. A channel parameter design method considering signal transmission gain, channel capacity and the sensitivity of LC resistance wave circuit parameters is proposed.
The simulation model is established based on the Matlab simulation platform. The simulation results show that the proposed method can effectively reduce the power crosstalk under large power transmission, ensure stable signal transmission, and realize bidirectional high-speed signal transmission. Finally, the experimental prototype is built. When the output power reaches 530.4W, the power transmission efficiency reaches 85.54 %, the signal forward transmission speed reaches 23.28Mbps and the signal reverse transmission speed reaches 24.24Mbit/s. The power crosstalk gain G_ps1 is 1.5 %, G_ps2 is 0.54 %, and the power crosstalk is well suppressed. When there is no signal transmission circuit, the power transmission efficiency is about 87.69 %, and when there is signal transmission circuit and signal transmission, the power transmission efficiency is about 85.54 %, which indicates that there is little effect of signal transmission on power transmission. Simulation and experiment verify the effectiveness and correctness of the proposed method.
Compared with the EC-WPT energy signal parallel transmission system proposed in the current literature, the crosstalk suppression method proposed in this paper can effectively suppress the power crosstalk when the power transmission is large, and realize the bidirectional high-speed stable transmission of the signal. It can also effectively suppress the crosstalk of signal transmission to power transmission and ensure the reliable transmission of power.

Key words： Electric-field coupled wireless power transfer signal bidirectional transmission power crosstalk parameter design

收稿日期: 2023-01-13

PACS:

TM724

基金资助:

国家自然科学基金资助项目（51977015）

通讯作者: 苏玉刚, 男,1962 年生,博士,教授,研究方向为无线电能传输技术、电力电子技术、控制理论应用与自动化系统集成。E-mail: su7558@qq.com

作者简介: 邓晨琳, 女,1998 年生,硕士研究生,研究方向为无线电能传输技术。E-mail: 1870255086@qq.com

引用本文:

苏玉刚, 邓晨琳, 胡宏晟, 孙跃, 李雨蒙, 邓仁为. 基于电场耦合的电能信号并行传输系统串扰抑制方法[J]. 电工技术学报, 0, (): 9010-10. Su Yugang, Deng Chenlin, Hu Hongsheng, Sun Yue, Li Yumeng, Deng Renwei. Crosstalk Suppression Method for Electric-Field Coupled Power and Signal Parallel Transmission System. Transactions of China Electrotechnical Society, 0, (): 9010-10.

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