Proton-exchange membrane fuel cell (PEMFC) systems for residential applications require an efficient and ripple-mitigating power conditioning system (PCS). The key point to achieve this is the design and control of the dc–dc converter. Based on the theoretical and experimental analysis of the traditional converter, a Danish-Korean team of Yong Wang et al. propose a novel parallel-series full bridge (P-SFB) dc–dc converter, and improve its phase-shifting scheme.

The researchers also propose a novel controller for low-frequency ripple current suppression applied to the converter. The experimental results verify that the dc–dc converter achieves a peak efficiency of 95.5%, therefore the PCS’s maximum efficiency reaches 92.9%. Furthermore, the low-frequency input current ripple is reduced significantly with the new controller, from 30% to 3%.

International Journal of Electrical Power & Energy Systems, Volume 31, Issue 1, January 2009, Pages 43–49.
DOI: 10.1016/j.ijepes.2008.10.005