A Single-Stage Constant-Power Double-Sided LCC Inductive Wireless Power Transfer Battery Charger

Abstract

A Constant-Power (CP) double-sided inductor-capacitor-capacitor (DS-LCC) wireless battery charger without any switch-controlled capacitor (SCC) is proposed in this paper. This CP wireless charger incorporates a semi-active rectifier (SAR) in the secondary side, and a control strategy is developed to achieve CP charging. This design eliminates the need for additional SCCs, reducing cost and system complexity. With the DS-LCC compensation topology, this wireless charger has no safety problem when misalignment. The feasibility of the proposed charger is validated through simulation, demonstrating that efficiency is maintained between 93.0% and 94.0%, which surpasses that of the state-of-the-art DS-LCC CP charger.