Assessment of efficiency and reliability of wide band-gap based H8 inverter in electric vehicle applications

Luca Concari, Davide Barater, Andrea Toscani, Carlo Concari, Giovanni Franceschini, Giampaolo Buticchi, Marco Liserre, He Zhang

Research output: Journal PublicationArticlepeer-review

18 Citations (Scopus)


This paper analyzes the performance of a three-phase converter architecture with a reduced common mode voltage to be used in electric motor drives. Starting from the classical three-phase bridge architecture, two additional switches are inserted in the DC link, in order to decouple the source from the load during the freewheeling intervals. Ad-hoc modulation strategies are introduced and evaluated against the classical three-phase space vector modulation. Three main parameters are analyzed: common mode voltage, efficiency and reliability. Experimental measurements on a converter prototype are used to evaluate the common mode performance. The efficiency in the case of Si-IGBT and SiC-MOSFETs is experimentally evaluated. Reliability analysis performed with a Coffin-Mason model showed that the higher efficiency offered by the SiC devices allows for a marked extension of the lifetime.

Original languageEnglish
Article number1922
Issue number10
Publication statusPublished - 2019


  • Common-mode voltage
  • Electric vehicle
  • Leakage current
  • Motor drive
  • Pulse width modulated inverter
  • Pulse-width modulation
  • Space vector

ASJC Scopus subject areas

  • Control and Optimization
  • Energy (miscellaneous)
  • Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Building and Construction
  • Fuel Technology
  • Renewable Energy, Sustainability and the Environment


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