Assessing the Effectiveness of the Test of Power Devices at the Board Level

Piumatti, D.; Borlo, Stefano; Mandrile, Fabio; Reorda, M. Sonza; Bojoi, Radu

doi:10.1109/dcis201949030.2019.8959845

Cited by 4 publications

(5 citation statements)

References 9 publications

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“…Therefore, it is necessary to identify a test strategy to verify the presence of critical faults. In general, the effects of the non-critical faults are compensated by the FAN9673 analog controller, as discussed in [39]. In other words, the PSU control system acts on the IGBTs for compensating the effect of the injected fault.…”

Section: The Fmeca Resultsmentioning

confidence: 99%

“…As discussed in Section 2, the structural model for the E/E subsystems is the circuit diagram. In addition, as discussed in Section 2.3 and in [38,39], in this paper, we consider only the catastrophic faults model applied at the SSUT circuit diagram level or inside a power device. The catastrophic faults are modeled by adding different electrical switches in the circuit diagram of the SSUT.…”

Section: Proposed Approachmentioning

confidence: 99%

“…However, the PCOLA/SOQ metric is not particularly efficient for the defects inside the device; only the Live attribute of the PCOLA metric provides general information about the device working. Therefore, some possible faults present inside the IGBT device are considered, as discussed in [38,39]. The next two subsections discuss the faults considered in the high-voltage PSU and inside the IGBT power device.…”

Section: The Psu Fault Consideredmentioning

confidence: 99%

“…Figure 7 shows the equivalent electrical model of the IGBT with 23 switches that model 23 catastrophic faults. The meaning of each IGBT catastrophic fault is discussed in [38,39]. The faults F1_BOOST, F2_BOOST, and F3_BOOST are placed in series to the diode, the IGBT, and the inductance; these three faults introduce three open circuits in the PSU boost cell.…”

Section: Igbt Power Device Faultsmentioning

confidence: 99%

“…Figure 7 shows the equivalent electrical model of the IGBT with 23 switches that model 23 catastrophic faults. The meaning of each IGBT catastrophic fault is discussed in [38,39].…”

Section: Igbt Power Device Faultsmentioning

confidence: 99%

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Multilevel Simulation Methodology for FMECA Study Applied to a Complex Cyber-Physical System

et al. 2020

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Complex systems are composed of numerous interconnected subsystems, each designed to perform specific functions. The different subsystems use many technological items that work together, as for the case of cyber-physical systems. Typically, a cyber-physical system is composed of different mechanical actuators driven by electrical power devices and monitored by sensors. Several approaches are available for designing and validating complex systems, and among them, behavioral-level modeling is becoming one of the most popular. When such cyber-physical systems are employed in mission- or safety-critical applications, it is mandatory to understand the impacts of faults on them and how failures in subsystems can propagate through the overall system. In this paper, we propose a methodology for supporting the failure mode, effects, and criticality analysis (FMECA) aimed at identifying the critical faults and assessing their effects on the overall system. The end goal is to analyze how a fault affecting a single subsystem possibly propagates through the whole cyber-physical system, considering also the embedded software and the mechanical elements. In particular, our approach allows the analysis of the propagation through the whole system (working at high level) of a fault injected at low level. This paper provides a solution to automate the FMECA process (until now mainly performed manually) for complex cyber-physical systems. It improves the failure classification effectiveness: considering our test case, it reduced the number of critical faults from 10 to 6. The remaining four faults are mitigated by the cyber-physical system architecture. The proposed approach has been tested on a real cyber-physical system in charge of driving a three-phase motor for industrial compressors, showing its feasibility and effectiveness.

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Section: The Fmeca Resultsmentioning

confidence: 99%

Section: Proposed Approachmentioning

confidence: 99%

Section: The Psu Fault Consideredmentioning

confidence: 99%

Section: Igbt Power Device Faultsmentioning

confidence: 99%

“…Figure 7 shows the equivalent electrical model of the IGBT with 23 switches that model 23 catastrophic faults. The meaning of each IGBT catastrophic fault is discussed in [38,39].…”

Section: Igbt Power Device Faultsmentioning

confidence: 99%

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