A Four-Switch Five-Level Inverter

This article introduces a new single-phase five-level inverter with reduced switch count, composed by a coupled-inductor, four switches, and two diodes. Its detailed analysis is provided, including a space-vector pulsewidth modulation strategy and design of its components. Compared with the conventi...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2021-12, Vol.68 (12), p.12109-12118
Main Authors: da Costa, Andre Elias Lucena, Jacobina, Cursino Brandao, Rocha, Nady, da Silva, Edison Roberto Cabral, Filho, Antonio Venancio de Moura Lacerda
Format: Article
Language:English
Subjects:
Capacitors
Conduction losses
Converters
Coupled-inductor
DC–AC inverter
Inductors
Inverters
Mathematical model
multilevel inverter (MLIs)
Pulse duration
Switches
Topology
Waveforms
Windings
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Summary:This article introduces a new single-phase five-level inverter with reduced switch count, composed by a coupled-inductor, four switches, and two diodes. Its detailed analysis is provided, including a space-vector pulsewidth modulation strategy and design of its components. Compared with the conventional three-level neutral-point clamped (NPC) inverter, the introduced converter generates an output waveform with five levels, while having the same number of devices. In addition, the topology uses less components and has lower conduction losses than other existing five-level inverters. The reduced number of devices leads to a fewer number of gate drives, decreasing the cost and complexity of the system. Simulation and experimental results validate the theoretical analysis of the introduced inverter.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2020.3047010