An Improved and Efficient High-Boost Switched Capacitor Multi-Level Inverter
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1
Odisha University of Technology and Research
2
Odisha Unviersity of Technology and Research
3
Mahavir Institute of Engineering and Technology
Corresponding author
Pratik Kar
Odisha University of Technology and Research
Power Electronics and Drives 2026;11(1)
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ABSTRACT
This paper presents a fundamental nine-level switched-capacitor multilevel inverter powered by a single DC source. The configuration employs two capacitors, nine switches, and one diode to generate nine distinct output voltage levels. It achieves an inherent voltage boosting capability of up to four times the input voltage. The switched-capacitor multilevel inverter (CSMLI) represents an enhanced topology that utilizes a strategic switching scheme to guarantee adequate capacitor charging and natural voltage balancing. The circuit adopts a novel charging approach that increases the number of charging states, thereby maintaining sufficient stored charge across the capacitors. An extended version of the basic CSMLI structure is also introduced to further increase the number of discrete output voltage levels. The proposed topology is evaluated against other comparable state-of-the-art inverters to demonstrate its advantages and effectiveness. The base configuration delivers improved harmonic performance and requires relatively small passive LC filters for harmonic mitigation. Simulation studies are conducted using the PSIM platform, and a hardware proto-type is developed to experimentally verify the performance and validate the proposed design.