Abstract
In this paper various topologies of bidirectional dc-dc converter are analyzed. Bidirectional dc-dc converters (BDC) have recently received a lot of attention due to the increasing need to systems with the capability of bidirectional energy transfer between two dc buses. Apart from traditional application in dc motor drives, new applications of BDC include energy storage in renewable energy systems, fuel cell energy systems, hybrid electric vehicles (HEV) and uninterruptible power supplies (UPS). The circuit configuration for various topologies of dc-dc converter is analyzed. Two topologies employs the coupled inductor to the same windings turns in the primary and secondary sides. In step-up mode, the primary and secondary windings of the coupled inductor are operated in parallel charge and series discharge to achieve high step-up voltage gain. In step-down mode, the primary and secondary windings of the coupled inductor are operated in series charge and parallel discharge to achieve high step-down voltage gain. One topology employs an inductor to achieve the bidirectional conversion. Thus, the converters has higher step-up and step-down voltage gains and under same electric specifications, the average value of the switch current for all the topologies is compared and analyzed. Simulation can be done for 14/42-V circuit and 24/400-V circuit are discussed using PSIM software for the various topologies and to compare their results.
Keywords: Bidirectional dc-dc converters, coupled inductor.
Full Issue
| View or download the full issue | PDF 126-141 |