PROJECT TITLE:

An Enhanced Model for Small-Signal Analysis of the Phase-Shifted FullBridge Converter - 2015

ABSTRACT:

This paper presents an in-depth important discussion and derivation of a close little-signal analysis of the part-shifted full-bridge (PSFB) converter. Circuit parasitics, resonant inductance, and transformer turns ratio have all been taken under consideration within the analysis of this topology's open-loop control-to-output, line-to-output, and load-to-output transfer functions. Accordingly, the many impact of losses and resonant inductance on the converter's transfer functions is highlighted. The enhanced dynamic model proposed in this paper allows the correct style of the converter compensator, as well as the impact of parasitics on the dynamic behavior of the PSFB converter. Detailed experimental results for a real-life thirty six V-to-fourteen V/10 A PSFB industrial application show wonderful agreement with the predictions from the model proposed herein.