The transition arm multilevel converter — a concept for medium and high voltage DC-DC transformers

I A Gowaid, G P Adam, B W Williams, A M Massoud, S Ahmed

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

35 Citations (Scopus)


This paper proposes a dc/ac converter topology where each phase leg comprises a conventional series switch valve in one arm and a series connection of half-bridge chopper cells in the other arm. Operation with trapezoidal modulation is analyzed where the half-bridge modules have a reduced footprint and silicon area compared to standard modular multilevel converter modules. Furthermore, no arm inductance is required. The utilization of the proposed converter topology in medium and high voltage front-to-front dc-dc converter topologies is analyzed. Simulations investigate key features of the converter in comparison to other published topologies.
Original languageEnglish
Title of host publication2015 IEEE International Conference on Industrial Technology (ICIT)
Number of pages6
ISBN (Electronic)9781479978007
Publication statusPublished - 18 Jun 2015


  • bridge circuits
  • DC-AC power convertors
  • DC-DC power convertors
  • power transformers
  • transition arm multilevel converter
  • medium voltage DC-DC transformers
  • high voltage DC-DC transformers
  • DC-AC converter topology
  • phase leg
  • series switch valve
  • series half-bridge chopper cell connection
  • trapezoidal modulation
  • half-bridge modules
  • footprint reduction
  • silicon area reduction
  • medium voltage front-to-front DC-DC converter topologies
  • high voltage front-to-front DC-DC converter topologies
  • capacitors
  • switches
  • insulated gate bipolar transistors
  • topology
  • DC-DC power converters
  • modulation
  • modular multilevel converter
  • dc transformer
  • dual active bridge
  • dc/dc power conversion


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