A new zero-voltage switching (ZVS) DC converter with less power switches is presented in this study. The proposed converter includes three subcircuits connected in parallel with the same switches to share load current. Thus, the proposed converter has less switch counts compared with the conventional parallel ZVS DC/DC converter and the output filter inductances and the transformer windings are reduced. Three-level diode clamped converter is used to reduce the voltage stress of switches at V in /2. The input two capacitor voltages are automatically balanced by adding two flying capacitors in three-level DC/DC converter. The current doubler rectifiers are used at the output side to reduce the output current ripple. The output capacitances of metal oxide semiconductor field effect transistors (MOSFETs) and resonant inductances are resonant at the transition interval. Thus, MOSFETs can be turned on under ZVS. Finally, experiments are provided to verify the effectiveness of the proposed converter.
This study presents a new soft switching DC/DC converter with current double rectifier to achieve zero-voltage switching for all power switches under a wide range of load condition. Three three-level pulse-width modulation circuit cells sharing the same power switches are adopted in the proposed converter to reduce the voltage stress of each switch at V in /2 and achieve load current sharing. Therefore the current stress and power rating of the secondary side components are reduced. The current double rectifiers are used at the secondary side to reduce the output ripple current. The sizes of the magnetic components and output filter capacitance can be reduced. The circuit analysis and design consideration of the proposed converter are discussed in detail. The proposed converter can be used in high input voltage and high load current applications. Finally, experiments based on a 1.5 kW scale-down prototype are provided to verify the effectiveness of the proposed converter.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.