A Fault-Tolerant Series-Resonant DC-DC Converter

Levy Costa, Giampaolo Buticchi, Marco Liserre

Research output: Journal PublicationArticlepeer-review

90 Citations (Scopus)


The series-resonant DC-DC converter (SRC) is widely used as power supply for telecommunications, wireless power transfer for electrical vehicle, and high-voltage power supplies. Recently, it became very popular in solid-state transformer application, where fault tolerance is a highly desired feature and it is obtained through redundancy. This letter proposes a reconfiguration scheme for the SRC for the case of failure in one semiconductor, which could drastically reduce the need of redundancy. Using the proposed scheme, the full-bridge based SRC can be reconfigured in a half-bridge topology, in order to keep the converter operational even with the failure [open circuit (OC) or short circuit (SC)] of one switch. As a drawback of this technique, the output voltage drops to half of its original value. Therefore, a novel reconfigurable rectifier based on the voltage-doubler topology is proposed as a solution to keep the output voltage constant after the fault. To verify the feasibility of the proposed scheme, the converter is tested experimentally in a 700-600 V prototype with 10 kW of output power. An insulated gate bipolar transistor (IGBT) SC fault is tested and the results confirm the effectiveness of the proposed approach.

Original languageEnglish
Pages (from-to)900-905
Number of pages6
JournalIEEE Transactions on Power Electronics
Issue number2
Publication statusPublished - Feb 2017
Externally publishedYes


  • Availability
  • DC-DC power converters
  • fault diagnosis
  • fault tolerance
  • isolated converter
  • reliability
  • resonant converter
  • series-resonant converter

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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