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Voltage balancing method for the multilevel flying capacitor converter using phase-shifted PWM

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hdl:2117/18628

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Ghias, Amer M.Y.M.
Pou Félix, Josep
Ciobotaru, M.
Agelidis, Vassilios
Document typeConference report
Defense date2012
Rights accessRestricted access - publisher's policy
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
Abstract
n flying capacitor (FC) converters, phase-shifted pulse-width modulation (PS-PWM) provides natural voltage balancing. However, for a practical application, a more robust balancing mechanism of maintaining the FC voltages at the desired values is required. This paper proposes a new closed-loop voltage balancing method for multilevel FC converters using PS-PWM. The proposed method balances the voltages of the FCs by modifying the duty cycle of each switch of the FC converter using a proportional (P) controller. The crossed effect between FC currents and duty cycles is considered and is used for FC voltage balancing. The Simulation results verify that the proposed voltage balancing method is very robust to different operating conditions, such as load transients and non-linear loads.
CitationGhias, A. [et al.]. Voltage balancing method for the multilevel flying capacitor converter using phase-shifted PWM. A: IEEE International Conference on Power and Energy. "IEEE International Conference on Power and Energy (PECON’12), Sutera Harbour, Sabah, Malaysia, 2-5 Dec. 2012.". Sutera Harbour, Sabah: 2012, p. 274-279. 
URIhttp://hdl.handle.net/2117/18628
Publisher versionhttp://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6450221
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