A Pyramid-Type (PT) Multilevel Converter Topology

Vahid Dargahi, Keith Corzine, Arash Khoshkbar Sadigh

Research output: Chapter in Book/Report/Conference proceedingConference contribution


This paper proposes a Pyramid-Type (PT) topology for multilevel power converters. The phase-leg of a PT-structure is comprised of half-bridge modules, as the main power electronics building blocks (PEBBs), that are connected in a pyramid form. The proposed PT-arrangement is primarily used to interconnect and tie the distinct and/or same types of 2-level and/or multilevel inverters together. The PEBBs are realized by the soft-switching low-frequency semiconductor devices such that the two switches of each half-bridge module turn on concurrently during voltage-level transitions. This is achieved through elimination of switching dead-time, and including an overlap into gate signals. This results in zero-voltage-switching (ZVS) or zero-current-switching (ZCS) phenomena for switches within the PEBBs. The utilization of PT-topology for interconnection of converters leads to new configurations. This paper reviews the PT-based derived topologies, and explores the advantages. For instance, a 3-level inverter topology, as the simplest structure, is investigated in this paper. The PT-topology is verified using the experimental results obtained from the prototype of a 3-level inverter formed by interconnection of two 2-level inverters via one PEBB.

Original languageEnglish (US)
Title of host publicationECCE 2020 - IEEE Energy Conversion Congress and Exposition
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages8
ISBN (Electronic)9781728158266
StatePublished - Oct 11 2020
Event12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020 - Virtual, Detroit, United States
Duration: Oct 11 2020Oct 15 2020

Publication series

NameECCE 2020 - IEEE Energy Conversion Congress and Exposition


Conference12th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2020
Country/TerritoryUnited States
CityVirtual, Detroit

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Control and Optimization
  • Energy Engineering and Power Technology


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