Open-Circuit Fault Reconfiguration of Multiphase Interleaved DC-DC Converter

This paper presents open-circuit fault analysis and diagnosis of a four-phase interleaved dc-dc power converter. The converter operation mode is first discussed in healthy condition. All fault cases are analyzed and discussed. A reconfiguration method is proposed for fault mitigation at level of the interleaved converter. Results are shown to validate the proposed reconfiguration method, where the converter’s output voltage is maintained at the desired value irrespective of which switch fails.