Low input current ripple converters for fuel cell power units

Fuel cell high-power applications

“…This similar concept has been proposed in [120]- [122]. One might suppose that this power converter can For ground isolation and high voltage step-up ratio (but more complicated), interleaved boost/flyback [123], [124], push-pull [125]- [127], and half bridge and full bridge [128]- [132] can be considered as candidate topologies for the FC converter. Advantages and disadvantages of these converters are discussed in [127], [128], and [132].…”

Current-fed Step-up DC/DC Converter for Fuel Cell Applications with Active Overvoltage Clamping

“…The value of C clamp should be set so that one half of the resonant period formed by Cclamp and L lk exceeds the maximum turn-off time of the main switches. [4] The clamping capacitor value is 2 2 2…”

“…Such power converter systems usually consist of a DC-DC converter and a DC-AC converter. Because of the comparatively high input and output voltage difference most frequently converters with high frequency transformer are acknowledged as the optimal solution for the DC-DC stage [1]- [4]. There are many known transformer isolated dc-dc converter topologies, which could be suitable to perform the necessary voltage boost from the fuel cell voltage level to the inverter dc link voltage.…”

“…Such converters are the full-bridge, half-bridge, the flyback, the forward and the push-pull basic topologies, as well as a number of their derived topologies [5], [6] These can be divided into two groups -voltage fed converters and current fed converters. In this paper a current fed topology is preferred, since it is characterized by low input current ripple, which is more appropriate for proton exchange membrane fuel cells modules [3], [4].…”

Design of Current Source Dc/Dc Converter for Interfacing a 5 Kw Pem Fuel Cell / Paaugstinošā Strāvas Avota Līdzsprieguma Pārveidotāja Izstrāde 5 Kw Ūdeņraža Degvielas Elementam

“…Due to a comparatively large input-output voltage difference, most often converters with a high frequency transformer are recognized as the optimal solution for the DC/DC stage [1][2][3][4]. Currently, many transformer isolated DC/DC converter topologies are known which are able to perform the voltage boosting necessary to match the inverter's DC-link voltage level: full-bridge, half-bridge, flyback, forward, basic push-pull topologies as well as a number of the derived topologies [5,6].…”