Improving the Dynamic Response of a Flying-Capacitor Three-Level Buck Converter

Abstract

This study presents a modified flying capacitor three-level buck dc-dc converter with improved dynamic response. First, the limitations in the transient response improvement of the conventional and three-level buck converters are discussed. Then, the three-level buck converter is modified in a way that it would benefit from a faster dynamic during sudden changes in the load. Finally, a controller is proposed that detects load transients and responds appropriately. In order to verify the effectiveness of the modified topology and the proposed transient controller, a simulation model and a hardware prototype are developed. Analytical, simulation, and experimental results show a significant dynamic response improvement.

Department(s)

Electrical and Computer Engineering

Keywords and Phrases

Buck Converters; Flying Capacitor; Hardware Prototype; Load Transients; Simulation Model; Sudden Change; Three-Level; Capacitors; Computer Simulation; Dynamic Response; HVDC Power Transmission; Transient Analysis; DC-DC Converters; Buck DC-DC Converter; Three-Level Buck Converter; Transient Response

International Standard Serial Number (ISSN)

0885-8993; 1941-0107

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2013 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 May 2013

Link to Full Text

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