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2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition
In this paper, an extended run time DC UPS system structure with fuel cell and supercapacitor is investigated. A wide input range bi-directional dc-dc converter is described along with the phase-shift modulation scheme and phase-shift with duty cycle control, in different modes. The delivered power and peak current are analyzed and calculated. The key parameters of the bi-directional dc-dc converter, the relationships between the input voltage, phase-shift angle, ratio of the transformer anddoi:10.1109/apec.2009.4802739 fatcat:vhpu6ysl6bd3dbpb66bbkp6soi