Switch Open-circuit Fault Diagnosis and Fault-Tolerant Control Strategy for DC-DC Converters

Jagtap, Satyawan R.; More, D. S.

doi:10.1109/iccsp48568.2020.9182063

Cited by 6 publications

(3 citation statements)

References 19 publications

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“…However, this solution leads to interruption in the output and works only for Boost converters. Reference [15,16] deals with fault detection and tolerance by monitoring inductor current variation. An event counter is used to latch and activate the redundant switch.…”

Section: Literature Surveymentioning

confidence: 99%

A Fault-Tolerant DC-DC Buck Converter with Zero Interruption Time for Autonomous Vehicles

Sharma K.,

2023

Scientia Iranica

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A high-end autonomous vehicle is expected to have at least a hundred different electronic subsystems. Each one of them takes power from the battery through Power Management Unit (PMU). Having an efficient PMU is crucial and is expected to supply the required level of uninterrupted power. PMU consists of several buck converters which translate a higher voltage level to required lower voltage levels. A PMU is more reliable if it consists efficient and well-structured voltage converters. In this paper, a fault-tolerant buck converter is designed which outputs 3.3 volts. A simple yet effective technique is proposed to design a fault-tolerant buck DC-DC converter by bypassing the faulty converter leg. The proposed system utilizes a signal processing-based method for fault detection. The secondary converter is activated only upon the confirmed prognosis of a faulty primary converter. Ripple content in the output Aluminum Electrolytic Capacitor (AEC) voltage is monitored and used as a primary health indicator for the converter. An experimental setup is built and tested in the laboratory. Experimental results indicate a smooth transition from the primary converter to the secondary demonstrating an uninterrupted power supply along with the simplicity and effectiveness of the proposed solution.

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Section: Literature Surveymentioning

confidence: 99%

A Fault-Tolerant DC-DC Buck Converter with Zero Interruption Time for Autonomous Vehicles

Sharma K.,

2023

Scientia Iranica

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“…Using this approach, the FT topology was able to increase the speed of post fault reconfiguration and minimize overshoots and undershoots providing efficient reconfiguration and smooth transition between a healthy and reconfigured state. By measuring the change in i L with respect to GDS a fast FD and FT control scheme has been presented in [73]. Any change in the inductor current due to the fault was used as an event which was further detected by an event counter.…”

Section: G Future Trends and Conclusion On Fault Diagnostic Techniquesmentioning

confidence: 99%

A Comprehensive Review of Fault Diagnosis and Tolerant Control in DC-DC Converters for DC Microgrids

Khan

Wen

2021

IEEE Access

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As the power interface between the energy storage devices (ESD) and the dc link of DC Micro-grids, dc-dc converters, which have been regarded as the heart of many critical applications such as electrical vehicles, data center, and aerospace power systems, have gained more and more attentions recently. The fault diagnosis and tolerant control in dc-dc converters become essential to ensure a reliable and robust power system especially for critical applicants, where a sudden stoppage, loss of functionality, or degradation of performance might result in a catastrophe. This paper focuses on different types of faults in dc-dc converters by analyzing main failure spots and mechanism, covering catastrophic fault and parametric fault from component to system. A comprehensive review of the up-to-date fault mode analysis, fault diagnosis signals and algorithms, and fault tolerant control in various dc-dc topologies has been presented. This research will provide a useful design guideline for the reliability improvement in all forms of dc-dc converters.

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“…Several researchers have presented model-based methods for diagnosing faulty switches through all the study of the system model, which demonstrate excellent accuracy and strong applicability but require a precise mathematical model or additional hardware [12], [66]- [72]. Previous model-based techniques, on the other hand, are susceptible to system characteristics and have limited detection accuracy [73]- [75]. Prior knowledge regarding converter specifications (parasitic resistances, inductances, capacitances) is critical for the improvement of model-based algorithms, but difficult to gain from the existing system [16], [44], [76].…”

Section: Introductionmentioning

confidence: 99%

An analysis of voltage source inverter switches fault classification using short time Fourier transform

Manap

Nikolovski

Skamyin

et al. 2021

IJPEDS

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<p>The dependability of power electronics systems, such as three-phase inverters, is critical in a variety of applications. Different types of failures that occur in an inverter circuit might affect system operation and raise the entire cost of the manufacturing process. As a result, detecting and identifying inverter problems for such devices is critical in industry. This study presents the short-time Fourier transform (STFT) for fault classification and identification in three-phase type, voltage source inverter (VSI) switches. TFR represents the signal analysis of STFT, which includes total harmonic distortion, instantaneous RMS current, RMS fundamental current, total non harmonic distortion, total waveform distortion and average current. The features of the faults are used with a rule-based classifier based on the signal parameters to categorise and detect the switch faults. The suggested method's performance is evaluated using 60 signals containing short and open circuit faults with varying characteristics for each switch in VSI. The classification results demonstrate the proposed technique is good to be implemented for VSI switches faults classification, with an accuracy classification rate of 98.3 percent.</p>

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Switch Open-circuit Fault Diagnosis and Fault-Tolerant Control Strategy for DC-DC Converters

Cited by 6 publications

References 19 publications

A Fault-Tolerant DC-DC Buck Converter with Zero Interruption Time for Autonomous Vehicles

A Fault-Tolerant DC-DC Buck Converter with Zero Interruption Time for Autonomous Vehicles

A Comprehensive Review of Fault Diagnosis and Tolerant Control in DC-DC Converters for DC Microgrids

An analysis of voltage source inverter switches fault classification using short time Fourier transform

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