一种基于最小频移键控的无线电能与信息同步传输系统设计

Design of a Wireless Power and Information Synchronous Transmission System Based on Minimum Frequency Shift Keying

摘要: 无线电能传输(Wireless Power Transfer, WPT)技术因其无需物理导线连接带来的灵活性，在植入式医疗、消费电子等领域应用广泛。随着应用的逐渐深入，闭环控制、数据交互等功能对WPT系统中的信息传输提出要求。文章针对传统频移键控信息传输方案造成输出电压较大波动的问题，提出了一种基于最小频移键控的信息传输方案。首先介绍了电路的结构与工作原理，然后分析了最小频移键控的工作原理以及信息调制与解调方案，最后搭建了Simulink仿真实验，验证了所提出信息传输方案对输出波动的改善，并实现了5 kbit/s的信息传输速率。

Abstract: Wireless power transfer (WPT) technology has found widespread applications in implantable medical devices, consumer electronics, and other fields due to its flexibility from non-physical wire connections. As the application deepens, functional requirements such as closed-loop control, load identification, and data interaction impose demands for information transmission in WPT systems. To address the need for large fluctuations in the output voltage caused by the traditional frequency shift keying information transmission scheme, this paper proposes an information transmission scheme based on minimum shift keying. First, the structure and working principle of the circuit are introduced, and then the working principle of minimum shift keying as well as the information modulation and demodulation schemes, are analyzed. Finally, a Simulink simulation experiment is built to verify the improvement of the proposed information transmission scheme on output fluctuations and achieve an information transmission rate of 5 kbit/s.