Design Considerations of a Flying Capacitor Multilevel Flyback Converter for DC-DC and Pulsed Power Applications

This paper presents the development of a Flying Capacitor Multilevel Flyback Converter (FCMFC) that provides easily scalable peak output voltage for pulsed power. Based on a combination of the flyback and flying capacitor multilevel (FCML) boost converter topologies, the FCMFC achieves faster slew r...

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Bibliographic Details
Published inIECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society pp. 1140 - 1145
Main Authors Graziani, Santino F., Barchowsky, Ansel, Grainger, Brandon M.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2018
Subjects
Buck converters
Capacitors
DC/DC
flyback design
flying capacitor multilevel design
inductor layout
Inductors
Magnetomechanical effects
pulsed power
Stress
switch stress
Switches
Topology
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Summary:This paper presents the development of a Flying Capacitor Multilevel Flyback Converter (FCMFC) that provides easily scalable peak output voltage for pulsed power. Based on a combination of the flyback and flying capacitor multilevel (FCML) boost converter topologies, the FCMFC achieves faster slew rates and peak power than previous pulsed power converters. FCMFC distributes the high voltage gain across the switch-diode-capacitor (SDC) stages, lowering device stresses and reducing the required magnetic component size compared to existing architectures. Two applications are addressed in this work: one for DC-DC boosting and one for pulsed power conversion. The FCMFC achieved a 100V to 1000V step-up while only utilizing half of the electrical hardware compared to existing topologies. Another FCMFC was developed to produce 36kV pulses at 8\mathbf{kV}/\mathbf{\mu s} , with a 50% decrease in the magnetic component size compared to an existing architecture from the literature.
ISSN:2577-1647
DOI:10.1109/IECON.2018.8591838