| Title |
Improved High Efficiency Bidirectional Resonant Converter for V2G EV Charger (OBC) |
| Authors |
Jae-Sung Oh ; Min-Ji Kim ; Jun-Hwan Lee ; Jung-Won Woo ; Eun-Soo Kim ; Jong-Seob Won |
| DOI |
10.6113/TKPE.2019.24.6.438 |
| Keywords |
Bidirectional resonant converters; LLC converters; DC/DC converters; OBC(On-Board-Charger) |
| Abstract |
In this paper, bidirectional LLC resonant DC/DC converters with the primary auxiliary windings in transformers of resonant circuits are proposed. Although the resonant capacitors are used on both the primary and secondary sides, regardless of the direction of power flow, the main feature of the proposed converters exhibits high gain characteristics without any mutual coupling between the resonant capacitors. For one of the proposed converters, an investigation of the operating characteristics in each mode has been carried out. A prototype of a 3.3 kW bidirectional LLC resonant converter for interfacing 750 V DC buses has been built and tested to verify the validity and applicability of the proposed converter. |