A High step-down DC/DC converter based on half-bridge LLC and PCL-BUCK
- Resource Type
- Conference
- Authors
- Dai, Kemin; Zha, Xiaoming; Gong, Jinwu; Xu, Chang; Ge, Xiaolu; Pan, Shangzhi
- Source
- 2022 IEEE International Power Electronics and Application Conference and Exposition (PEAC) Power Electronics and Application Conference and Exposition (PEAC), 2022 IEEE International. :1380-1385 Nov, 2022
- Subject
- Power, Energy and Industry Applications
Low voltage
Simulation
Soft switching
Switches
Power system stability
Stability analysis
Topology
high step-down DC-DC converter
soft switching
closed-loop system design
- Language
A novel high step-down DC/DC converter is presented, and its operating characteristics and design principles of significant component parameters are described to meet the design requirements of the low-voltage and high-current power supply module in data centers. The converter is a quasi-parallel Sigma structure made up of the LLC converter and PCL-Buck. Every switch in the topology operates in a soft switching state. The accuracy of the system’s steady-state measurements and capacity for dynamic response is significantly increased by the closed-loop control system’s optimization for the stability of PCL-Buck voltage regulation. In PSIM, a simulation model with a 100W360V input and 5V output was built. The RT-LAB test bench is used to conduct semi-physical experiments. The experimental platform’s parameters and simulation all compare favorably. The practicality of the converter is confirmed, and the simulation results mostly match the theoretical study.