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Switch failure diagnosis based on inductor current observation for boost converters

Abstract : Face to the growing number of applications using DC-DC power converters, the improvement of their reliability is subject to an increasing number of studies. Especially in safety critical applications, designing fault-tolerant converters is becoming mandatory. In this paper, a switch fault-tolerant DC-DC converter is studied. First, some of the fastest Fault Detection Algorithms (FDAs) are recalled. Then, a fast switch FDA is proposed which can detect both types of failures; open circuit fault as well as short circuit fault can be detected in less than one switching period. Second, a fault-tolerant converter which can be reconfigured under those types of fault is introduced. Hardware-In-the-Loop (HIL) results and experimental validations are given to verify the validity of the proposed switch fault-tolerant approach in the case of a single switch DC-DC boost converter with one redundant switch.
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https://hal.univ-lorraine.fr/hal-01384196
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Ehsan Jamshidpour, Philippe Poure, Shahrokh Saadate. Switch failure diagnosis based on inductor current observation for boost converters. International Journal of Electronics, Taylor & Francis, 2016, 103 (9), pp.1498-1509. ⟨10.1080/00207217.2016.1138243⟩. ⟨hal-01384196⟩

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