Hybrid Cascaded Multilevel Inverter (HCMLI) With Improved Symmetrical 4-Level Submodule

This letter proposes an improved symmetrical 4-level submodule as a basic cell for generating multiple dc voltage levels. A hybrid cascaded multilevel inverter (HCMLI) topology is formed by the combination of n submodules and a full-bridge. A comparative analysis against the recent multilevel invert...

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Bibliographic Details
Published inIEEE transactions on power electronics Vol. 33; no. 2; pp. 932 - 935
Main Authors Sze Sing Lee, Sidorov, Michail, Chee Shen Lim, Idris, Nik Rumzi Nik, Yeh En Heng
Format Journal Article
LanguageEnglish
Published New York IEEE 01.02.2018
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Electric bridges
Harmonic analysis
Hybrid cascaded multilevel inverter (HCMLI)
Inverters
Low voltage
Multilevel
Prototypes
reduced switch count
Switches
symmetrical submodule
Topology
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Summary:This letter proposes an improved symmetrical 4-level submodule as a basic cell for generating multiple dc voltage levels. A hybrid cascaded multilevel inverter (HCMLI) topology is formed by the combination of n submodules and a full-bridge. A comparative analysis against the recent multilevel inverters reveals that the proposed topology requires less number of switches and dc sources. In addition, the proposed submodule reduces the number of conducting switch and gate driver requirements compared to the widely used half-bridge submodule. To validate the operation of the proposed HCMLI topology, experimental results of a 9-level single-phase inverter controlled by selective harmonic elimination pulse-width-modulation is presented.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2017.2726087