Detection and Diagnosis Solutions for Fault-Tolerant VSI

This paper presents solutions for fault detection and diagnosis of two-level, three phase voltage-source inverter (VSI)topologies with IGBT devices. The proposed solutions combine redundant standby VSI structures and contactors (or relays) toimprove the fault-tolerant capabilities of power electronics in applications with safety requirements. The suitable combination ofthese elements gives the inverter the ability to maintain energy processing in the occurrence of several failure modes, includingshort-circuit in IGBT devices, thus extending its reliability and availability. A survey of previously developed fault-tolerant VSIstructures and several aspects of failure modes, detection and isolation mechanisms within VSI is first discussed. Hardwaresolutions for the protection of power semiconductors with fault detection and diagnosis mechanisms are then proposed to provideconditions to isolate and replace damaged power devices (or branches) in real time. Experimental results from a prototype areincluded to validate the proposed solutions.

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Cite this article

[IEEE Style]

A. Cordeiro, J. C. P. Palma, J. Maia, M. J. Resende, "Detection and Diagnosis Solutions for Fault-Tolerant VSI," Journal of Power Electronics, vol. 14, no. 6, pp. 1272-1280, 2014. DOI: 10.6113/JPE.2014.14.6.1272.

[ACM Style]

Armando Cordeiro, Joao C. P. Palma, Jose Maia, and Maia J. Resende. 2014. Detection and Diagnosis Solutions for Fault-Tolerant VSI. Journal of Power Electronics, 14, 6, (2014), 1272-1280. DOI: 10.6113/JPE.2014.14.6.1272.