Journal article
Modified phase-shifted PWM control for flying capacitor multilevel converters
IEEE Transactions on Power Electronics, Vol.22(1), pp.178-185
2007
Abstract
The issue of voltage imbalance remains a challenge for the flying capacitor multilevel converter. The phase-shifted pulsewidth modulation (PS-PWM) method has a certain degree of self-balancing properties. However, the method alone is not sufficient to maintain balanced capacitor voltages in practical applications. The paper proposes a closed-loop modified PS-PWM control method by incorporating a novel balancing algorithm. The algorithm takes advantage of switching redundancies to adjust the switching times of selected switching states and thus maintaining the capacitor voltages balanced without adversely affecting the system's performance. Key techniques of the proposed control method, including selection of switching states, calculation of adjusting times for the selected states, and determination of new switching instants of the modified PS-PWM are described and analyzed. Simulation and experimental results are presented to confirm the feasibility of the proposed method.
Details
- Title
- Modified phase-shifted PWM control for flying capacitor multilevel converters
- Authors/Creators
- C. Feng (Author/Creator) - Imperial College LondonJ. Liang (Author/Creator) - University of South WalesV.G. Agelidis (Author/Creator) - Murdoch University
- Publication Details
- IEEE Transactions on Power Electronics, Vol.22(1), pp.178-185
- Publisher
- IEEE
- Identifiers
- 991005541614107891
- Copyright
- © 2006 IEEE
- Murdoch Affiliation
- School of Engineering Science
- Language
- English
- Resource Type
- Journal article
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