Single-source three-phase switched-capacitor-based MLI
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1
Bhadrak Institute of Engineering and Technology, Bhadrak, India
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Thapar Institute of Engineering and Technology, Patiala, India
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IES College of Technology, Bhopal, India
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Thapar Institute of Engineering and Technology, Patiala, India
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Department of Power Electronics and Energy Control Systems, Faculty of Electrical Engineering, Automatics, Computer Science and Biomedical
Engineering, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland
Power Electronics and Drives 2022;7 (42):197-209
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ABSTRACT
This article proposes a novel three-phase inverter based on the concept of switched capacitors (SCs), which uses a single DC
source. A three-phase, seven-level line-to-line output voltage waveform is synthesised by the proposed topology, which includes eight
switches, two capacitors, and one diode per phase leg. The proposed topology offers advantages in terms of inherent voltage gain,
lower voltage stresses on power switches, and a reduced number of switching components. Additionally, the switched capacitors are
self-balanced, thereby eliminating the need for a separate balancing circuit. The proposed structure and its operating principle, the self-
balancing mechanism of the capacitors, and the control strategy are all thoroughly explained in the article. The proposed topology has
also been compared with some recent SC topologies. Lastly, the proposed topology has been shown to be feasible through simulation
and experimentation