Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Design and Control of Adjustable Turn-ratio LLC Converter for High-efficiency Operation of Wired/Wireless Integrated Charging System for Electric Vehicles
Authors Hyeon-Woo Jo ; Dong-Hyeon Sim ; Ju-A Lee ; Won-Jin Son ; Byoung-Kuk Lee
Page pp.237-246
ISSN 1229-2214
Keywords EV (Electric Vehicle); Integrated EV charging system; IPT (Inductive Power Transfer); LLC resonant converter; Adjustable turn-ratio
Abstract This paper proposes a method to adjust the turn ratio of a transformer for the high-efficiency operation of an LLC converter with a wide input range in a wired/wireless integrated charging system for electric vehicles. The characteristics of the inductive power transfer converter in the integrated charging system are analyzed to design the LLC converter, and the DC-link voltage range is derived. The aspect of voltage gain following each parameter of the LLC converter is analyzed, and the resonant network and transformer are designed. Based on the designed parameters, the feasibility of the design and control method is verified by implementing the operation of the LLC converter according to the DC-link and battery voltages.