The cascaded H-bridge multilevel converter is a versatile solution in many high-power and high-voltage industrial application. With the rising in the number of switches, the probability of failure increases, due to junction temperature that is produced by power losses, and hence reliability of the converter decreases. In the literature, various discontinuous modulation techniques have been introduced with the aim of minimizing the switching losses of multilevel converters. However, these techniques greatly degrade the harmonic quality of the output waveforms. Therefore, in this paper, a discontinuous PWM strategy based on a new shape of the carrier signal is proposed to the purpose of achieving the improvement of the output voltage waveform harmonic quality, while also decreasing switching losses. Experimental results are presented to assess the effectiveness of the proposed technique.
Efficiency and Harmonic Quality Improvement in a Cascaded H-Bridge Converter Through an Innovative Carrier Signal / Bruno, L.; Leuzzi, R.; Monopoli, V. G.. - (2023), pp. 3466-3473. (Intervento presentato al convegno 2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023 tenutosi a usa nel 2023) [10.1109/ECCE53617.2023.10362440].
Efficiency and Harmonic Quality Improvement in a Cascaded H-Bridge Converter Through an Innovative Carrier Signal
Bruno L.;Leuzzi R.;Monopoli V. G.
2023-01-01
Abstract
The cascaded H-bridge multilevel converter is a versatile solution in many high-power and high-voltage industrial application. With the rising in the number of switches, the probability of failure increases, due to junction temperature that is produced by power losses, and hence reliability of the converter decreases. In the literature, various discontinuous modulation techniques have been introduced with the aim of minimizing the switching losses of multilevel converters. However, these techniques greatly degrade the harmonic quality of the output waveforms. Therefore, in this paper, a discontinuous PWM strategy based on a new shape of the carrier signal is proposed to the purpose of achieving the improvement of the output voltage waveform harmonic quality, while also decreasing switching losses. Experimental results are presented to assess the effectiveness of the proposed technique.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
