Isolated Single-Input Dual-Output LLC Converter for a Wide Range of Voltage Gain using Mode Transition

• DOI: 10.1541/ieejjia.20010311
• Publication Date: 2021-01-14T22:09:30Z
• Authors: Yuki Kinoshita; Hitoshi Haga
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology

In this study, an LLC converter that can achieve a wide range of voltage gain and high efficiency for two loads is proposed. The the proposed found to be greater than conventional full-bridge converter. Depending on ON/OFF state five primary switches, offers modes operation. These enable squeezed switching frequency span close resonance frequency. all operation modes, one load controlled by frequency, while other phase-shift angle. control method provides operating seamless transition between different modes. Furthermore, mode transitions are performed based relationship First, theoretical characteristics analyzed. Next, each described. prototype designed convert constant input 360V output voltages ranging from 80-420V 36-48V. experimental results confirmed steady-state waveforms achieved in multiple gains less 0.5 more 1.0. Moreover, without large deviations outputs. Finally, evaluated comparison high-efficiency operations CC2 region battery compared