Single-phase step-up switched-capacitor-based multilevel inverter topology with SHEPWM
Document Type
Article
Publication Date
6-1-2021
Abstract
Multilevel inverter (MLI) topologies play a crucial role in the dc-ac power conversion due to their high-quality performance and efficiency. This article aims to propose a new switched-capacitor-based boost multilevel inverter topology (SCMLI). The proposed topology consists of nine power semiconductor switches with one dc voltage source and two capacitors, capable of generating a nine-level output voltage waveform with twice voltage gain. With the addition of two switches, the proposed topology can be used for higher voltage-gain applications. Other features of the proposed topology include the self-voltage balancing of the capacitors, parallel operation of the capacitors, lower voltage stress across the switches, along with the inherent polarity changing capability. To obtain the high-quality output waveform, a selective harmonic elimination pulsewidth modulation technique is applied. In this technique, the detrimental low-order harmonics can easily be regulated and eliminated from the output voltage of MLI. The proposed topology is compared with the recently introduced SCMLI topologies considering various parameters to set the benchmark of the proposed topology. The performance of the proposed MLI is investigated through various experimental results using a laboratory prototype setup.
Keywords
Topology, Capacitors, Switches, Inverters, Turning, Electrical engineering, Stress, Boost topology, Multilevel inverter (MLI), Reduce switch count, Selective harmonic elimination pulsewidth modulation (SHEPWM), Switched-capacitor (SC)
Divisions
sch_ecs
Funders
University of Malaya, Malaysia, under Impact Oriented Interdisciplinary Research Grant (IIRG) (IIRG011A2019),Ministry of Higher Education, Malaysia, under Large Research Grant Scheme (LRGS) (LR008-2019)
Publication Title
IEEE Transactions on Industry Applications
Volume
57
Issue
3
Publisher
Institute of Electrical and Electronics Engineers
Publisher Location
445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA