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

Volume

58

Issue

6

fYear

2011

fDate

6/1/2011 12:00:00 AM

Firstpage

2572

Lastpage

2575

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);

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/TIE.2010.2058076

Filename

5510164