Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title High Frequency (MHz) LLC Resonant Converter for a Capacitor Coupling Wireless Power Transfer (CCWPT)
Authors Young-Soo You ; HyunWon Moon ; Kang-Hyun Yi
DOI 10.6113/TKPE/2016.21.2.111
Page pp.111-116
ISSN 1229-2214
Keywords CCWPT(Capacitor Coupling Wireless Power Transfer); High frequency LLC converter; Coupling capacitor; Glass dielectric layer
Abstract This paper proposes a high-frequency (MHz) LLC resonant converter for a capacitor coupling wireless power transfer (CCWPT). The CCWPT uses electric field in the coupling capacitor between the transmitter and receiver electrodes with a dielectric layer. Given that capacitance is very small and the impedance is large, transferring power with a simple series resonance is difficult. Therefore, the high frequency(MHz) and high Q factor LLC converter is proposed to reduce the impedance of the coupling capacitance and to obtain a high output voltage. This paper deals with the operation analysis of the proposed LLC converter and a theoretical capacitance estimation. The operation and features of the proposed CCWPT LLC converter is verified with a 4.2 W prototype for charging mobile devices.