宇称-时间对称电场耦合无线电能传输系统电场分布特性研究

Study on Electric-field Distribution Characteristics of Parity-time Symmetric Electric-field Coupled Wireless Power Transfer System

电场耦合无线电能传输ECPT(electric-field coupled wireless power transfer)系统具有耦合极板轻便、跨金属传能、涡流损耗可忽略等优点。其中,宇称-时间对称电场耦合无线电能传输PT-ECPT(parity-time symmetric ECPT)系统具有在耦合极板间距发生变化时保持恒定输出的特性,具有广泛的应用前景。基于此,研究了PT-ECPT系统的电场辐射分布。理论分析、仿真及实验结果表明,在强耦合区域且输出功率相同的情况下,PT-ECPT系统的电场分布在耦合系数较小时比传统的谐振式ECPT系统更为集中,使得PT-ECPT在小耦合系数时安全性更高。

The electric-field coupled wireless power transfer(ECPT)system possesses several advantages,including lightweight coupling pole plates,cross-metal power transmission and negligible eddy current losses.Specifically,the parity-time symmetric ECPT(PT-ECPT)system characterized by its capability to maintain a constant output under variations in the coupling pole plate spacing exhibits promising application prospects.Consequently,the electric-field radiation distribution of the PT-ECPT system was studied.The theoretical analysis,simulations and experimental results indicate that compared with those of the conventional resonant ECPT systems,the electric-field distribution of the PT-ECPT system is more concentrated in the regions of strong coupling while maintaining identical output power.This concentration is particularly pronounced when the coupling coefficient is small,which makes the PT-ECPT system more secure under conditions of reduced coupling coefficients.