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Open AccessArticle

Common Switch Fault Diagnosis for Two-Stage DC-DC Converters Used in Energy Harvesting Applications

1
ECAM Strasbourg Europe—ICube Laboratory UMR7357, 67400 Illkirch-Graffenstaden, France
2
Institut Jean Lamour (UMR7198), Université de Lorraine, 54000 Nancy, France
3
GREEN Laboratory, Université de Lorraine, 54000 Nancy, France
*
Author to whom correspondence should be addressed.
Electronics 2019, 8(3), 293; https://doi.org/10.3390/electronics8030293
Received: 30 January 2019 / Revised: 19 February 2019 / Accepted: 25 February 2019 / Published: 5 March 2019
This paper proposes a new Unified Switch Fault Diagnosis (UFD) approach for two-stage non-isolated DC-DC converters used in energy harvesting applications. The proposed UFD is compared with a switch fault diagnosis consisting of two separate fault detection algorithms, working in parallel for each converter. The proposed UFD is simpler than the two parallel fault diagnosis methods in realization. Moreover, it can detect both types of switch failures, open circuit and short circuit switch faults. It can also be used for any two-stage non-isolated DC-DC converters based on two single switch converters, no matter the converter circuits in each stage. Some selected simulation and Hardware-in-the-Loop (HIL) experimentation results confirm the validity and efficiency of the proposed UFD. Also, the proposed UFD is applied successfully for fault-tolerant operation of a buck/buck–boost two-stage converter with synchronous control and a redundant switch. View Full-Text
Keywords: DC-DC converter; energy harvesting; fault diagnosis; fault tolerant operation DC-DC converter; energy harvesting; fault diagnosis; fault tolerant operation
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Jamshidpour, E.; Poure, P.; Saadate, S. Common Switch Fault Diagnosis for Two-Stage DC-DC Converters Used in Energy Harvesting Applications. Electronics 2019, 8, 293.

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