Comparison of Different Modulations Strategies Applied to a Multilevel Flying Capacitor Inverter
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Lazzari, Thiago
Carvalho, Edivan Laercio
Michels, Leandro
Vieira, Rodrigo Padilha
Pinheiro, Humberto
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This paper presents a comparison of different carrierbased modulation strategies. The modulation by geometric approach stands out due to the possibility of evenly distribution of the switching pulses between the semiconductors and reducing the harmonic distortions in the output voltage of DC-AC multilevel converters. The research presents possibilities to explore the degrees of freedom of this modulation in order to reduce the number of switching of the semiconductors, harmonic distortions, and regulate the voltage of the flying capacitors in a three-phase Flying Capacitor inverter. Comparisons with the carrier-based Discontinuous Modulation, Phase-Disposition, and Phase-Shift modulations with open loop are performed using simulation results obtained by the software PSIM.
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