A Review of Degradation Behavior and Modeling of Capacitors

Gupta, Anunay; Yadav, Om Prakash; DeVoto, Douglas; Major, Joshua

doi:10.1115/ipack2018-8262

Cited by 56 publications

(21 citation statements)

References 40 publications

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“…which will cause electrical parameters (e.g., RESR, C, ZC, DF, Rp), and non-electrical parameters (e.g., weight, structure, internal temperature, internal pressure) to be changed [107]. Generally, these parameters can be chosen as the degradation indicators of capacitors.…”

Section: B Design Procedures For Condition Monitoringmentioning

confidence: 99%

An Overview of Condition Monitoring Techniques for Capacitors in DC-Link Applications

Zhao

Davari

et al. 2021

IEEE Trans. Power Electron.

148

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Capacitors are widely used in dc links of power electronic converters to balance power, suppress voltage ripple, and store short-term energy. Condition monitoring (CM) of dc-link capacitors has great significance in enhancing the reliability of power converter systems. Over the past few years, many efforts have been made to realize CM of dc-link capacitors. This paper gives an overview and a comprehensive comparative evaluation of them with emphasis on the application objectives, implementation methods, and monitoring accuracy when being used. First, the design procedure for the condition monitoring of capacitors is introduced. Second, the main capacitor parameters estimation principles are summarized. According to these principles, various possible CM methods are derived in a step-by-step manner. On this basis, a comprehensive review and comparison of CM schemes for different types of dc-link applications are provided. Finally, application recommendations and future research trends are presented.

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Section: B Design Procedures For Condition Monitoringmentioning

confidence: 99%

An Overview of Condition Monitoring Techniques for Capacitors in DC-Link Applications

Zhao

Davari

et al. 2021

IEEE Trans. Power Electron.

148

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“…High temperatures within the capacitor result in the evaporation of the electrolyte leading to its degradation. Leakage current also contributes to heat accumulation within the capacitor capsule [20].…”

Section: Effect Of Temperaturementioning

confidence: 99%

A Bidirectional LSTM-Based Prognostication of Electrolytic Capacitor

Kulevome¹,

Wang²,

Wang³

2021

PIER C

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Knowing the state-of-health (SOH) of equipment, device or component is very essential for the secure and dependable operation of a system. Electrolytic capacitors are undoubtedly one of the essential components of power supply modules used in aerial and underwater vehicles, and every equipment requires a conversion of voltage from one level to another. This has encouraged research into the components of the power supply used in such systems of which electrolytic capacitor is of interest in this study. In this paper, we explore a new approach to implementing prognostics and health management (PHM) for electrolytic capacitors and propose a method of estimating the SOH leading to the prediction of the remaining useful life (RUL). This is accomplished by using a bidirectional long short-term memory (BLSTM) network to capture the degradation trends. We demonstrate the power and leverage that this method brings to bear in encoding time-domain dependencies in accurately estimating the SOH bereft of state models as employed in traditional methods. We validate the proposed approach using capacitor data recorded at different electrical over-stress accelerated aging conditions. The proposed method surpasses other existing methods in RUL prediction as indicated by the error and relative accuracy.

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“…This is considered the main wear-out mechanism and is strongly accelerated by high temperatures. It was also found that the wear-out of Al electrolytic capacitors is not strongly affected by voltage, as long as this is within the allowed operation limit [40]. This means that designing with a large voltage tolerance is not very effective to increase the component lifetime.…”

Section: Capacitorsmentioning

confidence: 99%

“…When higher operating temperatures are required, PolyEthylene Napthalene (PEN) or PolyPropylene Sulfide (PPS) are used with respective operating temperatures up to 125 • C and 140 • C. The distinct advantages of metallized film capacitors are the dominant open mode failure and the self-healing capability [39]. The open mode failure is typically a consequence of a reduced capacitance by consecutive self-healing processes and referred to as a soft failure [40]. The self-healing process is in fact a localized electric breakdown in the film that is automatically cleared by evaporation due to the large temperature increase [53].…”

Section: Capacitorsmentioning

confidence: 99%

Practical Considerations for Designing Reliable DC/DC Converters, Applied to a BIPV Case

et al. 2020

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State-of-the-art reliability assessment typically starts from a given circuit topology, for which the most suitable components are selected using a Physics of Failure analysis. This paper, however, addresses the topology selection stage, which is the foundation in designing reliable converters. Based on an overview of the reliability performance of different components, a methodology is presented as a guideline for comparing topologies to one another. The focus is directed at practical consequences associated with certain designs. Furthermore, an overview is provided on the latest developments in component technology reliability improvements. The developed methodology is mainly intended for demanding applications, where long lifetimes are required or elevated ambient temperatures are present. After the topology selection, an overview of possibilities is given that allows further increasing converter availability. Finally, the methodology is applied to the design of module level converters for building integrated photovoltaics, which is a high temperature application with a high desired lifetime. A prototype and experimental results are presented.

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A Review of Degradation Behavior and Modeling of Capacitors

Cited by 56 publications

References 40 publications

An Overview of Condition Monitoring Techniques for Capacitors in DC-Link Applications

An Overview of Condition Monitoring Techniques for Capacitors in DC-Link Applications

A Bidirectional LSTM-Based Prognostication of Electrolytic Capacitor

Practical Considerations for Designing Reliable DC/DC Converters, Applied to a BIPV Case

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