| Title |
A 3-Bridge LLC Resonant Converter with Wide Input/Output Voltage Gain Characteristics |
| Authors |
Sang-Jae Yoo ; Ki-Chan Jang ; Eun-Soo Kim ; Yong-Seog Jeon ; Yoon-Sang Kook |
| DOI |
10.6113/TKPE.2020.25.2.142 |
| Keywords |
DC-DC converter; LLC resonant converter; Battery charger |
| Abstract |
This paper presents a DC/DC LLC resonant converter with wide input/output voltage gain characteristics and its control method for efficiency improvement. For a wide input/output voltage gain characteristics without designing small transformer magnetization inductance, the proposed converter changes the topology into three modes of operation according to the main switch switching pattern. In each operating mode, variable LINK voltage modulation and frequency modulation were performed to control output voltage and improve operating efficiency. A prototype of a 5-kW DC/DC LLC resonant converter was built and tested to verify the validity and applicability of the proposed converter. |