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

Sze Sing Lee*, Michail Sidorov, Chee Shen Lim, Nik Rumzi Nik Idris, Yeh En Heng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

109 Citations (Scopus)


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.

Original languageEnglish
Article number7976310
Pages (from-to)932-935
Number of pages4
JournalIEEE Transactions on Power Electronics
Issue number2
Publication statusPublished - Feb 2018
Externally publishedYes


  • Hybrid cascaded multilevel inverter (HCMLI)
  • reduced switch count
  • symmetrical submodule

Cite this