A nine-level switched-capacitor step-up inverter with low voltage stress

Wang, Yaoqiang, Ye, Juncheng, Wang, Kaige, Li, Gen ORCID: https://orcid.org/0000-0002-0649-9493 and Liang, Jun ORCID: https://orcid.org/0000-0001-7511-449X 2023. A nine-level switched-capacitor step-up inverter with low voltage stress. Journal of Electrical Engineering & Technology 18 , pp. 1147-1159. 10.1007/s42835-022-01187-z

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Abstract

This paper proposes a nine-level switched-capacitor step-up inverter (9LSUI) which can achieve a quadruple voltage gain with single dc source. Differing from other switched-capacitor inverters, the voltage stress of switches is effectively reduced due to the elimination of H-bridge, and the peak inverse voltage of all switches is kept within 2Vdc. In addition, the proposed inverter is able to integrate inductive load, and the capacitor voltage self-balancing can be achieved without any auxiliary circuits. Moreover, the topology structure can be flexibly extended to raise the output levels, and the peak inverse voltage of switches can remain constant with the increase of sub-modules in the extended structure. Comprehensive comparisons are performed to verify the outstanding advantages of the proposed inverter. Finally, the steady-state and dynamic performance of the proposed inverter is validated through an experimental prototype, and the experimental results are provided to prove the theoretical analysis.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Additional Information:	This article is licensed under a Creative Commons Attribution 4.0 International License
Publisher:	KOREAN INST ELECTR ENG
ISSN:	1975-0102
Date of First Compliant Deposit:	1 July 2022
Date of Acceptance:	8 July 2022
Last Modified:	08 May 2023 06:50
URI:	https://orca.cardiff.ac.uk/id/eprint/150940

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