宽耦合范围的多模式无线电能传输系统

Multi-mode Wireless Power Transmission System with Wide Coupling Range

无线电能传输系统的传输能力在很大程度上受到其线圈耦合范围的限制。对于串联补偿的无线电能传输系统,传输功率随线圈耦合增强将降低,因此在实际的系统伏安容量限制条件下,传统无线电能传输系统难以在较宽的线圈耦合范围内输出所需的额定功率。为此提出了一种基于中心抽头绕组的可重构谐振拓扑,可在不同的线圈耦合范围内选择不同的连接方案和工作模式。可重构谐振拓扑充分考虑了各部分电路在不同模式中的重复利用,使系统在覆盖更宽耦合范围的同时保持了简洁的电路拓扑和尽量少的元件数量。仿真结果证明了该结构可在不显著增加系统伏安容量的情况下,大幅增大系统输出额定功率的线圈耦合范围。

The power transfer capability of a wireless power transfer is largely limited by its coupling range.For a series-series(SS)compensated wireless power transfer(WPT)system,the transferred power will decrease when the coil coupling increase.Therefore,under the limitation of the actual system VA rating,it is difficult for the conventional wireless power transfer system to output the required rated power within a wide coil coupling range.A reconfigurable LC resonant structure based on a center-tapped winding is porposed,which can select different connection schemes and working modes in different coil coupling ranges.The reconfigurable LC resonant structure fully considers the reuse of various parts of the circuit in different modes,so that the system covers a wider coupling range,while maintaining a simple circuit topology and as few components as possible.The simulation results prove that the structure can greatly increase the coil coupling range of the system output rated power without significantly increasing the volt-ampere capacity of the system.