Title:
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Single-carrier phase-disposition PWM techniques for multiple interleaved voltage-source converter legs
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Author:
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Konstantinou, Georgios; Capellá Frau, Gabriel José; Pou, Josep; Ceballos Recio, Salvador
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Other authors:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica; Universitat Politècnica de Catalunya. TIEG-P - Terrassa Industrial Electronics Group -Power |
Abstract:
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Interleaved converter legs are typically modulated with individual carriers per leg and phase-shifted PWM (PS-PWM) as it facilitates current balancing amongst the legs. Phase-disposition PWM (PD-PWM), despite the better harmonic performance, cannot be directly used due to the resulting current imbalance that may damage the converter. This paper addresses the current sharing issue and proposes a single-carrier PD-PWM technique for multiple leg two-level converters based on a hierarchy scheme derived from current sorting algorithms. An extension of the proposed algorithm through a switching state feedback loop, limiting the average switching frequency, is also developed. In both cases, the load current is shared amongst the legs and the high-quality of the output voltages and currents is maintained while the circulating currents amongst the converter legs are kept to a minimum. Simulation results demonstrate the method for multiple interleaved legs as well as its current sharing capabilities for high-power applications. Experimental results from a low-power laboratory prototype validate the operation of the proposed approach. |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria elèctrica -Locomotion -Electric inductors -Harmonic analysis -Electric current converters -Harmonic analysis -Inductors -Interleaving -Legged locomotion -multilevel converters -multilevel waveforms -parallel legs -Power system harmonics -Pulse width modulation -Sorting -Switches -voltage source converters -Locomoció -Inductors elèctrics -Anàlisi harmònica -Convertidors de corrent elèctric |
Rights:
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Document type:
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Article - Published version Article |
Published by:
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Institute of Electrical and Electronics Engineers (IEEE)
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