A Single Source Quadruple Boost Nine-Level Switched-Capacitor Inverter With Reduced Components and Continuous Input Current

• Published in: IEEE access Vol. 12; pp. 52922 - 52933
• Main Authors: Kumar, Devanand, Raushan, Ravi, Chakraborty, Suprava
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 2024; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Capacitors; Continuous input current; Design parameters; Electric potential; Inverters; Pulse duration modulation; Pulse width modulation; reduced components; Semiconductor devices; Stress; switched capacitor; Switched capacitor networks; Switches; Topology; Voltage; voltage boost; Voltage control; voltage stress
• ISSN: 2169-3536; 2169-3536
• DOI: 10.1109/ACCESS.2024.3386747

The multilevel inverter (MLI) serves as a pivotal class of power electronic converters, well-suited for high-power applications at medium voltage levels, ensuring superior power quality. While designing an MLI, there is a motif among the number of components, voltage stress on the semiconductor devices, and its voltage-boosting ability. A single source nine-level switched-capacitor based novel inverter with reduced components has been proposed in this paper. The proposed H-bridge based switched capacitor inverter topology employs nine switches, two capacitors, two diodes, and one DC source. The inverter has a quadruple voltage boost and the ability to draw continuous input current from the DC supply and self-voltage balance with a voltage ripple of less than <inline-formula> <tex-math notation="LaTeX">\bf {5\%} </tex-math></inline-formula>. A comprehensive study of performance parameters, design consideration, and loss analysis of the proposed inverter is also incorporated. A level-shifted pulse width modulation technique is implemented to operate the inverter for unity to <inline-formula> <tex-math notation="LaTeX">\bf {0.5} </tex-math></inline-formula> lagging load power factors and <inline-formula> <tex-math notation="LaTeX">\bf {1-0.2} </tex-math></inline-formula> modulation indices. The dynamic responses of the proposed switched capacitor inverter topology are obtained through MATLAB simulation for analysis and further validated by hardware prototype.