基于ECPT无线传输技术的恒压输出特性传输结构

A Constant Output Voltage Compensation Topology Based on ECPT Technology

电场耦合式无线电能传输(ECPT)技术借助金属极板在高频电场中激发出的位移电流来实现无线电能的传输。在实际运用中,部分用电设备的负载可能会发生变化,但所需的电压不会发生大的改变,对此提出一种包含T型与π型CLC结构的复合谐振简化拓扑(其中T型结构用以输出稳定高频电流,π型结构用以输出稳定电压),并利用基波等效法对两种拓扑结构进行分析。最后,通过搭建一套可传输135W电能的恒压ECPT系统进行仿真与试验,验证了所提出结构的特性。该ECPT结构具有电路结构简单、经济、可靠的优点。

The electric coupled power transfer (ECPT) technology enables the wireless power transfer by means of the displacement current excited by a metal plate in a high frenquency electric field. In practical use, the loads of some electrical equipment may change, but the required voltage does not change greatly. This paper proposed a simplified complex resonant topology composed of T-CLC and π-CLC circuit to achieve a constant output voltage. The T-CLC is used to output the constant high-frequency AC current and the π-CLC circuit is adopted to output a constant AC voltage. The fundamental sinusoidal approximation method is used to analyze the proposed system. Finally, the simulation and experiment are carried out by constructing a constant voltage ECPT system capable of transmitting 135W power, and the characteristics of the proposed structures are verified. The ECPT structure has the advantages of simple circuit structure, economy and reliability.