Title :
Phase-Shifted Full-Bridge Series-Resonant DC-DC Converters for Wide Load Variations
Author :
Lo, Yu-Kang ; Lin, Chung-Yi ; Hsieh, Min-Tsong ; Lin, Chien-Yu
Author_Institution :
Dept. of Electron. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei, Taiwan
fDate :
6/1/2011 12:00:00 AM
Abstract :
This paper presents the design of a phase-shifted full-bridge series resonant converter (PS-FB SRC). The proposed FB SRC features a novel two-mode operation. It is operated in series resonant mode at normal loads. The switching frequency is varied to regulate the output voltage. The fixed-frequency phase-shifted pulse width modulation, on the other hand, is used to adjust the effective duty cycle and regulate the output voltage at light loads. The proposed converter exhibits high conversion efficiency for wide-range load conditions. The relationships among the voltage gain, the switching frequency, and the effective duty cycle are discussed and analyzed. Finally, a 48-V/42-A prototype is implemented. Experiments are conducted to verify the theoretical analysis.
Keywords :
DC-DC power convertors; phase shifters; pulse width modulation; resonant power convertors; switching convertors; duty cycle; fixed-frequency phase-shifted pulse width modulation; high conversion efficiency; light load; output voltage; phase-shifted full-bridge series resonant DC-DC converter; series resonant mode; switching frequency; two-mode operation; voltage gain; wide load variation; wide-range load condition; DC-DC power converters; Load management; Optical modulation; Phase modulation; Prototypes; Pulse width modulation; Resonance; Space vector pulse width modulation; Switching frequency; Voltage; Conversion efficiency; phase-shifted full-bridge converter; series resonant converter (SRC);
Journal_Title :
Industrial Electronics, IEEE Transactions on
DOI :
10.1109/TIE.2010.2058076
