Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title A Bridgeless Single Stage AC-DC Converter for Wireless Power Charging System
Authors Min-Ji Kim ; Sang-Jae Yoo ; Kyung-Jong Yoo ; Jung-Won Woo ; Eun-Soo Kim ; In-Gab Hwang
DOI 10.6113/TKPE.2020.25.1.44
Page pp.44-53
ISSN 1229-2214
Keywords Single stage AC-DC converter; WPTS(Wireless Power Transfer System); Hybrid three level DC-DC converter; Resonant converter; EV charger
Abstract A bridgeless single-stage AC-DC converter for wireless power charging systems is proposed. This converter is composed of a PFC stage and a three-level hybrid DC-DC stage. The proposed converter can control the wide output voltage (200?450 VDC) by the variable link voltage and the pulse-width voltage applied to the primary resonant circuit due to the phase-shifted modulation at a fixed switching frequency. Moreover, the input power factor and the total harmonic distortion can be improved by using the proposed converter. A 1 kW prototype was fabricated and validated through experimental results and analysis.