Analysis and Design of a Cost-Effective WPT System With Single-Input and Multioutput Based on Buck-Integrated Rectifier

Recently, wireless power transfer (WPT) has been a competitive power supply mode due to its convenience and safety. Normally, a WPT system provides only one output, whereas some devices request multiple voltage levels. In this letter, a single-input and multioutput WPT system is proposed. By integrating two buck converters into a full-wave rectifier, three constant voltage outputs are achieved with only four
mosfet
s and two inductors. Besides, all
mosfet
s can achieve zero voltage switching by designing the inductors. A 324-W prototype is fabricated with three voltage levels, i.e., 48, 24, and 18 V. Experimental results demonstrate that the three outputs are independent of loads and each other, and the overall efficiency ranges from 91.84% to 93.33%.