基于效率优化和恒流充电控制的无线电能传输系统研究

Wireless Power Transfer Systems Based on Efficiency Optimization and Constant Current Charging Control

在无线电能传输系统实际应用中,负载变化影响系统效率和充电电流。为实现效率优化和恒流充电,本文设计了一套双边可控无线电能传输系统。基于原边扰动观测法,通过测量最小系统直流输入电流实现效率优化;利用副边PI算法控制的半控整流实现超电容器的恒流充电。恒流充电的电流为2A时,本文提出的双边控制策略能够有效地提高系统效率。

The system efficiency and charging current dependent on load condition during practical applications.To achieve the object of efficiency optimization and constant current（CC）charging,the dual-side controlled wireless power transfer（WPT）system was designed.The efficiency optimization of the primary-side based on perturbation observation（PO）algorithm was implemented through measuring the minimum system DC input current.The secondary-side PI controlled semi-active rectifier achieves constant current charging for the supercapacitor.When the constant charging current was 2 A,the system efficiency was significantly improved by the proposed dual-side control method.