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http://dx.doi.org/10.6113/TKPE.2022.27.3.237

Design and Control of Adjustable Turn-ratio LLC Converter for High-efficiency Operation of Wired/Wireless Integrated Charging System for Electric Vehicles  

Jo, Hyeon-Woo (Dept. of Electrical & Computer Engineering, Sungkyunkwan University)
Sim, Dong-Hyeon (Dept. of Electrical & Computer Engineering, Sungkyunkwan University)
Lee, Ju-A (Dept. of Electrical & Computer Engineering, Sungkyunkwan University)
Son, Won-Jin (Dept. of Electrical & Computer Engineering, Sungkyunkwan University)
Lee, Byoung-Kuk (Dept. of Electrical Engineering, Sungkyunkwan University)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.27, no.3, 2022 , pp. 237-246 More about this Journal
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.
Keywords
EV (Electric Vehicle); Integrated EV charging system; IPT (Inductive Power Transfer); LLC resonant converter; Adjustable turn-ratio;
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