Abstract
In this chapter, various topologies of DC-DC converters for use with Polymer Electrolyte Membrane Fuel Cells (PEMFC) are emphasized. The non-isolated type of DC-DC converters are examined as they are of special interest. A 24 kW, 180 V PEMFC source is considered as the power source and the input and output voltages and input and output currents are plotted. In addition, the ripples present in the FC currents have been evaluated for each converter under study for common loads. The non-inverting type buck boost converters, like buck boost converters (BBC) and interleaved buck boost converters (IBBC), are studied and their steady state performances are presented. Further, the proposed converters’ multi-device buck boost converters (MDBBC) and multi-device multi-phase interleaved buck boost converter (MDMPIBBC) are compared with existing BBC and IBBC topologies for an FC power source whose terminal voltage varies from 28.0 V at full load and 45.0 V at no load. From the study it is shown that the proposed MDMPIBBC converter gives smaller ripple current with lower sizes of passive component parameters. The converter configurations for integrating an FC source with a DC link feeding a 400 V, 50 Hz inverter is proposed.
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