Impact of receiver conversion configuration on the efficiency of Wireless Power Transfer Systems

摘要

This paper investigates the impact of the receiver conversion configuration on the efficiency of Wireless Power Transfer Systems (WPTSs). Post-Regulated Synchronous Rectifier (PRSR) and Controlled Synchronous Rectifier (CSR) configurations are analyzed and compared with reference to a battery charger application. A WPTS model including conduction and switching losses is adopted to analyze the operation range and the efficiency of the two configurations. A 2W@6.78MHz battery charger is adopted as WPTS test bench, with coils coupling coefficient ranging from 0.03 to 0.09. The results of simulations show that the PRSR and the CSR have dual performances in terms of efficiency and operability with respect to the coupling coefficient and the load current level.