Weight optimization of a flying capacitor multilevel converter

Many power electronics converter applications demand for an increase in gravimetric (kW/kg) power density, such as in photovoltaic and transportation. The flying capacitor multilevel topology has a high potential for weight reduction. In this paper, both an analytical and a designed-based optimizati...

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Bibliographic Details
Published in2023 IEEE Applied Power Electronics Conference and Exposition (APEC) pp. 2021 - 2026
Main Authors Bishnoi, Hemant, Schweizer, Mario, Pettersson, Sami, Canales, Francisco
Format Conference Proceeding
LanguageEnglish
Published IEEE 19.03.2023
Subjects
Capacitors
Density measurement
flying capacitor
multilevel
optimization
Power electronics
Power system measurements
Prototypes
Switching frequency
Voltage
weight
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Summary:Many power electronics converter applications demand for an increase in gravimetric (kW/kg) power density, such as in photovoltaic and transportation. The flying capacitor multilevel topology has a high potential for weight reduction. In this paper, both an analytical and a designed-based optimization of the overall converter weight with respect to the number of voltage levels and the switching frequency is presented. Furthermore, a highly efficient (99.2%), 15kW, 3-phase 5-level flying capacitor converter prototype with LCL output filter stage for grid connected applications is presented to experimentally validate the optimization results. The built converter achieved an outstanding gravimetric power density of 5 kW/ kg.
ISSN:2470-6647
DOI:10.1109/APEC43580.2023.10131268