An Advanced Three-Level Active Neutral-Point-Clamped Converter with Improved Fault-Tolerant Capabilities

Ramin Katebi, Jiangbiao He, Nathan Weise

Research output: Contribution to journalArticlepeer-review

54 Scopus citations


A resilient fault-tolerant silicon carbide (SiC) three-level power converter topology is introduced based on the traditional active neutral-point-clamped converter. This novel converter topology incorporates a redundant leg to provide fault tolerance during switch open-circuit faults and short-circuit faults. Additionally, the topology is capable of maintaining full output voltage and maximum modulation index in the presence of switch open and short-circuit faults. Moreover, the redundant leg can be employed to share load current with other phase legs to balance thermal stress among semiconductor switches during normal operation. A 25-kW prototype of the novel topology was designed and constructed utilizing 1.2-kV SiC metal-oxide-semiconductor field-effect transistors. Experimental results confirm the anticipated theoretical capabilities of this new three-level converter topology.

Original languageEnglish
Pages (from-to)6897-6909
Number of pages13
JournalIEEE Transactions on Power Electronics
Issue number8
StatePublished - Aug 2018

Bibliographical note

Publisher Copyright:
© 1986-2012 IEEE.


  • Active neutral-point-clamped (ANPC) converter
  • current sharing
  • fault-tolerant operation
  • open circuit
  • redundant leg
  • short circuit

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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