An Inductive and Capacitive Hybrid Wireless Power Transfer System for Consumer Electronics with Shared Components

Wireless power transfer (WPT) technology is more convenient and flexible than traditional wired charging technology, which can eliminate the metal wire connection between the power supply and the load. In this paper, a wireless charging system which combines inductive power transfer (IPT) and capacitive power transfer (CPT) circuits for desktop is proposed. The system can realize the two working modes of IPT and CPT respectively, and users can switch the charging mode according to the specific use scenario and charging demand. Both IPT and CPT circuits adopt the series-series compensation, which has the advantages of a simple structure and high efficiency. In this paper, the theoretical analysis and derivation of the circuit topology under the two operating modes are carried out, and the parameter design process is given. Finally, the validity of the system is verified by simulation.