基于双侧F-LCLC网络的恒压型电场耦合无线电能传输系统

电场耦合无线电能传输(ECWPT)系统借助高频电场作为能量介质来传输能量。在实际应用中,许多用电设备需要工作在稳定电压下。为了满足这种需求,提出了一种基于双侧F-LCLC谐振网络的恒压型ECWPT系统,在无需额外设置检测与调节电路的条件下,实现了输出电压不随负载的变化而改变,同时保证系统始终工作于零相角(ZPA)状态。分析了F-LCLC谐振网络正向与反向两种形式的传输特性,给出了网络输出电压与其负载阻值无关的条件,并研究了系统的总谐波畸变率、恒压特性及参数敏感性,在此基础上给出了系统主要参数的设计方法。最后,通过仿真与实验验证了所提出系统的恒压特性以及参数设计方法的正确性。

Constant-voltage Electric-field Coupled Wireless Power Transfer System Based on Double-sided F-LCLC Networks

An electric-field coupled wireless power transfer(ECWPT)system employs a high-frequency electric-field as energy medium to transfer power wirelessly. For applications where constant voltage is required, an ECWPT system with double-sided F-LCLC resonant networks is proposed to maintain the output voltage against the variation of load resistance and guarantee system operation in zero-phase angle all the time. The condition resulting in load-independent output voltage is given based on an analysis of transmission characteristics of forward and opposite F-LCLC resonant networks. And the F-LCLC resonant network design is investigated under constraints on the inductance, total harmonic distortion and parameter sensitivity. On this basis, a parameter design method for the system is presented. Finally, the transfer characteristics and the design method are validated by simulation and experiment.