Voltage and current balancing control of WBG multilevel converters for aeronautic applications

Voltage balancing of flying capacitor multilevel converter (FCMC) is one of difficult criterion for the design and using FCMC, particularity with high switching frequency of Wide Band Gap semi-conductor component (SiC and GaN). The aim of this paper is to analyze the voltage-current balancing charac...

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Bibliographic Details
Main Authors: Tran, Duc-Hoan, Nguyen, Minh-Hoang
Format: Conference Proceeding
Language:English
Subjects:
active capacitor voltage balancing
Automatic voltage control
Capacitors
current and voltage loop
Legged locomotion
Multilevel converters
phase-shifted pulse width modulation (PS-PWM)
PI control
Pulse width modulation
Series-parallel multilevel converter
Switching frequency
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Summary:Voltage balancing of flying capacitor multilevel converter (FCMC) is one of difficult criterion for the design and using FCMC, particularity with high switching frequency of Wide Band Gap semi-conductor component (SiC and GaN). The aim of this paper is to analyze the voltage-current balancing characteristic of a series-parallel multilevel converter when it is operated under Phase-Shifted PWM (PS-PWM). The natural balancing of open-loop PS-PWM may not be robust and efficiency to keep the converter stable under different transient conditions. Therefore, the paper proposes a closed-loop PS-PWM control method using a voltage and current balancing algorithm. Furthermore, calculations of P and PI controllers are presented for closed-loop control of voltage and current. Simulation results from a three-phase seven-level series-parallel converter are presented.
ISSN:2475-7896
DOI:10.1109/ICCAIS56082.2022.9990284