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Energies 2018, 11(2), 268; https://doi.org/10.3390/en11020268

A Novel Concept for Three-Phase Cascaded Multilevel Inverter Topologies

Department of Electrical and Computer Engineering, Curtin University, Perth, WA 6102, Australia
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Received: 16 November 2017 / Revised: 3 January 2018 / Accepted: 15 January 2018 / Published: 23 January 2018
(This article belongs to the Section Electrical Power and Energy System)
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Abstract

One of the key challenges in multilevel inverters (MLIs) design is to reduce the number of components used in the implementation while maximising the number of output voltage levels. This paper proposes a new concept that facilitates a device count reduction technique of existing cascaded MLIs. Moreover, the proposed concept can be utilised to extend existing single phase cascaded MLI topologies to three-phase structure without tripling the number of semiconductor components and input dc-supplies as per the current practice. The new generalized concept involves two stages; namely, cascaded stage and phase generator stage. The phase generator stage is a combination of a conventional three-phase two level inverter and three bi-directional switches while the cascaded stage can employ any existing cascaded topology. A laboratory prototype model is built and extensive experimental analyses are conducted to validate the feasibility of the proposed cascaded MLI concept. View Full-Text
Keywords: multilevel inverters; device counts reduction; cascaded inverter; conventional three-phase inverter multilevel inverters; device counts reduction; cascaded inverter; conventional three-phase inverter
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Hasan, M.M.; Abu-Siada, A.; Islam, S.M.; Muyeen, S.M. A Novel Concept for Three-Phase Cascaded Multilevel Inverter Topologies. Energies 2018, 11, 268.

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