Decoupled Design of Voltage Regulating and Balancing Controls for Four-Level Flying Capacitor Converter

This article declares a simple voltage balancing and decoupling control methodology for four-level flying capacitor converter. The proposed approach only uses two proportional controllers to balance the capacitor voltages and one additional proportional-integral controller to regulate the output vol...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2021-12, Vol.68 (12), p.12152-12161
Main Authors: Lu, Che-Yu, Lin, Ding-Hao, Chen, Hung-Chi
Format: Article
Language:English
Subjects:
Balancing
Capacitors
Control methods
Converters
Decoupling
Decoupling control
Discharges (electric)
Electric potential
flying capacitor converter (FCC)
four level
Inductors
Multilevel converters
Proportional integral
Switches
Turning
Voltage
voltage balancing
Voltage control
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Summary:This article declares a simple voltage balancing and decoupling control methodology for four-level flying capacitor converter. The proposed approach only uses two proportional controllers to balance the capacitor voltages and one additional proportional-integral controller to regulate the output voltage without sensing the inductor current. The proposed decoupled design reduces the interactions between the output regulating loop and voltage balancing loop. Eventually, a 400-W prototype is set up to verify the theoretic analysis and dynamic performance.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2020.3047039