Hybrid multilevel converter employing half-bridge modules

Alessandro L. Batschauer, Marcelo L. Heldwein, Samir A. Mussa, Arnaldo J. Perin

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

7 Scopus citations


A novel hybrid three-phase multilevel converter is proposed for medium-voltage applications. The converter employs a conventional three-phase voltage source inverter (VSI) linking series connected half-bridge modules at each phase. With the proposed connection, a large portion of energy can be processed by the VSI without the need for insulation or by employing a single transformer, while smaller power shares are processed within the half-bridge modules. Thus, the requirements for galvanically insulated dc sources are reduced. Modularity is naturally achieved. A modulation scheme for a four-level version is proposed and analyzed in detail. This scheme allows unidirectional power flow in all dc sources and, consequently enables diode bridges to be employed in the rectification input stage for unidirectional applications.

Original languageEnglish
Title of host publication2009 Brazilian Power Electronics Conference, COBEP2009
Number of pages8
StatePublished - 2009
Externally publishedYes
Event2009 Brazilian Power Electronics Conference, COBEP2009 - Bonito MS, Brazil
Duration: 27 Sep 20091 Oct 2009

Publication series

Name2009 Brazilian Power Electronics Conference, COBEP2009


Conference2009 Brazilian Power Electronics Conference, COBEP2009
CityBonito MS


  • Hybrid converters
  • Multilevel converters
  • PWM modulation
  • Three-phase inverters


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