Abstract
With the introduction of the more electric aircraft, there is growing emphasis on improving overall efficiency and thus gravimetric and volumetric power density, as well as smart functionalities and safety of an aircraft. In future on-board power distribution networks, so-called high voltage DC (HVDC, typically +/−270VDC) supplies will be introduced to facilitate distribution and reduce the associated mass and volume, including harness. Future aircraft power distribution systems will also very likely include energy storage devices (probably, batteries) for emergency back up and engine starting. Correspondingly, novel DC-DC conversion solutions are required, which can interface the traditional low voltage (28 V) DC bus with the new 270 V one. Such solutions presently need to cater for a significant degree of flexibility in their power ratings, power transfer capability and number of inputs/outputs. Specifically, multi-port power-scalable bi-directional converters are required. This paper presents the design and testing of such a solution, addressing the use of leading edge wide-band-gap (WBG) solid state technology, especially silicon carbide (SiC), for use as high-frequency switches within the bi-directional converter on the high-voltage side.
Highlights
The use of 115VAC 400 Hz and 28VDC power networks is a historical feature of avionic electrical power generation and distribution systems
It is worth noting that the inductor could be realized as leakage inductance of the transformer, in the form of integrated magnetics
The solution is based on scalable bi-directional DC-DC conversion in future aircraft power networks [12,13]
Summary
The use of 115VAC 400 Hz and 28VDC power networks is a historical feature of avionic electrical power generation and distribution systems. The electrification of the aircraft to replace hydraulic or pneumatic functions with electrical ones is one of the prime movers in this field, as in the concepts of the More and All electric aircrafts [1,2,3]. Architectures investigated over enhanced aircraft architectures investigated over recent recent years include smart power management systems, characterized by the presence of at least one years include smart power management systems, characterized by the presence of at least one highhigh-voltage dc bus
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