电流型电场耦合无线电能传输技术

The Current-type Capacitively Coupled Wireless Power Transfer Technology

为了提高电场耦合式无线电能传输网络的输出稳定性,提出一种电流型电场耦合的无线电能传输网络。通过设计耦合电容之前的阻抗变换网络,能够在固定的工作频率,及在负载和耦合电容允许的变化范围内,使耦合电流近似与负载和耦合电容无关,从而避免了相对复杂的频率跟踪技术。在接收端,通过设计磁耦合式阻抗变换电路,既可实现电压型输出,又可实现电流型输出,以满足不同负载需求。在合理假设下,建立分析模型,得出主要参数的设计方法。通过仿真和实验,验证网络的工作原理和设计的正确性。

In order to improve the output stability of the capacitively coupled wireless power transmission network, a current-type capacitively coupled wireless power transmission network was proposed. Through the design of the impedance matching network before the coupled capacitor, coupling current is almost approximately invariant with the change of the load impedance and the coupling capacitance under fixed operating frequency. Therefore, the relatively complex frequency tracking technologies is avoided. At the receiving terminal, both voltage-type and current-type output can be realized, through the property design of magnetic coupling impedance transformation circuit, so as to satisfy the demands of different type load. Under reasonable assumptions, the circuit models of the network were built, and the design methods of main parameter were obtained. The correctness of the working principle and the design method of the network were verified by means of both simulation and experiment.