Design and Modelling of a Bidirectional DC-DC Converter based on Full Bridge Current Doubler Topology for Aeronautical Applications

Abstract

This project falls within the framework of the research about More Electric Aircraft (MEA) concept, which is the target of the current designs. In this context, electrical system is being reinforced as one of the main power systems. Electrical power level and voltage level transmission are increasing –the last one is tending to High Voltage Direct Current (HVDC) level– and requirements of generation, distribution, management and control of this kind of power are becoming more and more challenging. Within electrical system, power converters are responsible for electrical power transmission. Moreover, they must fulfil aeronautical standards in respect of on-board electrical and electronic systems. The precise aim of this project is to study suitable topologies for DC-DC bidirectional and isolated power converters within defined framework. Many industries, as aeronautical or automotive, request them with better features –for instance, power density and e ciency are critical KPI in aeronautical industry–. After a review of main power circuits that could fulfil specifications for these applications, a promising topology will be analysed from a numerical point of view. Particularly, Bidirectional Current Doubler is the topology subject of study. Its working principle will be analysed under certain operating range domain. Simulation models will be developed to asses topology performance in such operating domain. By knowing currents and voltages on ideal elements, a more realistic components selection will be carried out, particularly as far as MOSFETs concerns. Finally, regarding a more little bit accurate model, e ciency will be calculated in terms of input and output power.