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This study aims to introduce an efficient, real-time approach for diagnosing open and short circuit faults in single-phase inverters equipped with fault-tolerant topology. It enables the inverter to continue functioning post-fault. This method relies on monitoring the switch voltages and integrating a floating (redundant) leg into the conventional single-phase inverter topology. The redundant leg may lead to increased cost, however, it is necessary for critical applications such as medical equipment, aeronautical fields, and electric vehicles/power trains where the failure of the inverter can not be tolerated. Simulation validation confirms the speed and effectiveness of the fault diagnosis method, and the floating leg ensures reliable operation even in the event of a fault.

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Real-Time Short and Open-Circuit Fault Detection with Fault-Tolerant Topology in Single-Phase Inverters

  • 会议论文

  • 发表日期：

    2026年

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  • Chouaib Djaghloul,
  • Noman Khan,
  • Khalil El Khamlichi Drissi,
  • François Vurpillot,
  • Kambiz Tehrani

摘要

This study aims to introduce an efficient, real-time approach for diagnosing open and short circuit faults in single-phase inverters equipped with fault-tolerant topology. It enables the inverter to continue functioning post-fault. This method relies on monitoring the switch voltages and integrating a floating (redundant) leg into the conventional single-phase inverter topology. The redundant leg may lead to increased cost, however, it is necessary for critical applications such as medical equipment, aeronautical fields, and electric vehicles/power trains where the failure of the inverter can not be tolerated. Simulation validation confirms the speed and effectiveness of the fault diagnosis method, and the floating leg ensures reliable operation even in the event of a fault.