Design of a novel flying capacitor multilevel buck-boost converter for electric aircraft de-icing applications
Zhu, Mingrui
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https://hdl.handle.net/2142/117688
Description
Title
Design of a novel flying capacitor multilevel buck-boost converter for electric aircraft de-icing applications
Author(s)
Zhu, Mingrui
Issue Date
2022-12-09
Director of Research (if dissertation) or Advisor (if thesis)
Stillwell, Andrew
Department of Study
Electrical & Computer Eng
Discipline
Electrical & Computer Engr
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
Power Converter
Power Electronics
Pulse De-icing
Pulse De-frosting
Buck-Boost Converter
Flying Capacitor Multilevel (FCML) Converter
Abstract
Under extreme weather conditions, the reliability of electric aircraft systems is challenged when the accumulated snow and ice can greatly interfere with normal operation. Electric pulse de-icing is a promising solution, due to its high efficiency and high power density. Challenges in pulse de-icing design include the high pulsing power rating and broad ranges of both the DC bus voltage and load voltage. A flying capacitor multi-level (FCML) converter can maintain a high power density, as the effective switching frequency at the switching node can be increased, which further reduces the filtering requirement and, hence, the size of filtering components. A buck-boost converter is able to conduct both wide step-up and step-down DC-DC conversions. Therefore, a novel topology, the FCML Buck-Boost converter topology, is proposed in this work. The operation theory and design considerations will be discussed. Simulation results, as well as the measurements of an experimental prototype, will be presented. The hardware prototype demonstrates a peak efficiency of 98.6% and a maximum power of 1100 W over a wide range of operating voltage.
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