| Title |
LLC Resonant Converter Operating over a Wide Output Voltage Range by Varying the Input Voltage and Changing Operating Modes |
| Authors |
Ji-Cheol Lee ; Jong-Seong Joo ; Ye-Chang Heo ; Takongmo Marius ; Eun-Soo Kim ; Yong-Seog Jeon ; Yoon-Sang Kook |
| DOI |
https://doi.org/10.6113/TKPE/2017.22.6.517 |
| Keywords |
Isolated DC-DC converter ; LLC resonant converter ; Wide output voltage range ; EV Charger |
| Abstract |
In this paper, we propose an LLC resonant converter that operates over a wide controllable output voltage (50 VDC to 800 VDC) and shows high efficiency characteristics under all load conditions and output voltages. Two 3.3kW prototypes are designed for an experimental comparison between the variable frequency control (control scheme 1) and the variable input voltage(VIN) control (control scheme 2) mechanisms. The experimental results show that the variable input control mechanism demonstrates high efficiency under all loads and output voltages. |