Sze Sing Lee, Kyo-Beum Lee, Ibrahim Mohd Alsofyani, Yeongsu Bak, and Jing Fang Wong, "Improved Switched-Capacitor Integrated Multilevel Inverter with a DC Source String," IEEE Transactions on Industry Applications, vol. 55, no. 6, pp. 7368–7376, Nov. 2019 > Paper

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Paper

International Journals Sze Sing Lee, Kyo-Beum Lee, Ibrahim Mohd Alsofyani, Yeongsu Bak, and Jing Fang Wong, "Improved Switched-Capacitor Integrated Multilevel Inverter with a DC Source String," IEEE Transactions on Industry Applications, vol. 55, no. 6, pp. 7368–7376, Nov. 2019. -SCI

2019

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The integration of switched-capacitor techniques into multilevel inverters (MLIs) with a dc source string contributes to the boosting

of voltage gain, renders it particularly attractive in reducing the number of input dc sources in the series string. However, the recent 

two-stage MLI topologies suffer from high voltage stress across the backend H-bridge. Addressing this concern, an improved 

topology, namely the one-switched-capacitor integrated MLI (1SCI-MLI) is proposed in this paper. An extended topology of 1SC-MLI 

is also established by appropriate incorporation of another switched-capacitor circuit. The two proposed topologies are endowed 

with voltage boosting capability. They also feature low switch count and low number of dc sources. More importantly, they resolve 

the high voltage stress problem in the existing counterparts. Their corresponding operational analysis and comparisons with recent 

MLI topologies are discussed. Simulation and experimental results from a laboratory prototype are presented to validate the 

effectiveness of the proposed topologies. 

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