Topological design and modulation strategy for buck-boost three-level inverters

Gao, Feng, Teodorescu, Remus, Blaabjerg, Frede, Loh, Poh Chiang, & Vilathgamuwa, D. Mahinda (2007) Topological design and modulation strategy for buck-boost three-level inverters. In Batarseh, Issa (Ed.) Proceedings of the 2007 IEEE Power Electronics Specialists Conference, IEEE, Orlando, Florida, pp. 1578-1584.

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Abstract

To date, designed topologies for DC-AC inversion with both voltage-buck and boost capabilities are mainly focused on two-level circuitries with extensions to three-level possibilities left nearly unexplored. Contributing to this area of research, this paper presents the design of a number of viable buck-boost three-level inverters that can also support bidirectional power conversion. The proposed front-end circuitry is developed from the Cuk-derived buck-boost two-level inverter, and by using the "alternative phase opposition disposition" (APOD) modulation scheme, the buck-boost three-level inverters can perform distinct five-level line voltage and three-level phase voltage switching by simply controlling the active switches located in the designed voltage boost section of the circuits. As a cost saving option, one active switch can further be removed from the voltage-boost section of the circuits by simply re-routing the gating commands of the remaining switches without influencing the ac output voltage amplitude. To verify the validity of the proposed inverters, Matlab/PLECS simulations were performed before a laboratory prototype was implemented for experimental testing.

Impact and interest:

3 citations in Scopus
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1 citations in Web of Science®

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ID Code: 74167
Item Type: Conference Paper
Refereed: Yes
Additional URLs:
Keywords: Buck-boost, Dc-link-cascaded inverter, Neutral-point-clamped inverter, Three-level inverters
DOI: 10.1109/PESC.2007.4342231
ISBN: 9781424406548
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2007 IEEE
Deposited On: 21 Jul 2014 22:09
Last Modified: 22 Jul 2014 22:13

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