Noninvasive Online Condition Monitoring of Output Capacitor’s ESR and C for a Flyback Converter

Yao, Kai; Cao, Cheng; Yang, Siwen

doi:10.1109/tim.2017.2749838

Cited by 38 publications

(17 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on this, [82] further proposed an improved estimation scheme to monitor the capacitors for a converter operated in discontinuous conduction mode (DCM). In [83], a similar scheme is proposed for a CCM flyback converter, as shown in Fig. 23(d).…”

Section: ) Circuit Operation Model Based Methods (1c 1g)mentioning

confidence: 99%

“…Using capacitor voltages of particular instants to calculate RESR and C. RESR: <6.2% [82] Real-online estimation, low-frequency sampling, no capacitor current sensor. RESR: <5.83% [83] C: <9.5% [83] Real-online estimation, low-frequency sampling, no capacitor current sensor. RESR: <6.5% [88] C: <5.5% [88] Real-online estimation, no capacitor current sensor, full parameters monitoring.…”

Section: Pv Boost [81][82]mentioning

confidence: 99%

See 1 more Smart Citation

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

Zhao

Davari

et al. 2021

IEEE Trans. Power Electron.

150

View full text Add to dashboard Cite

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.

show abstract

Section: ) Circuit Operation Model Based Methods (1c 1g)mentioning

confidence: 99%

Section: Pv Boost [81][82]mentioning

confidence: 99%

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

Zhao

Davari

et al. 2021

IEEE Trans. Power Electron.

150

View full text Add to dashboard Cite

show abstract

“…Several existing methods for buck converters [38,43,44] are capable of applying boost converters [39,51,52]. Monitoring techniques for the fly-back converter and the isolating DC-DC converter are proposed in [54][55][56]. The approaches in [43,44] are also adapted for fly-back converters in [54,55].…”

Section: Esr and Capacitance Estimation Methodsmentioning

confidence: 99%

Review of Health Monitoring Techniques for Capacitors Used in Power Electronics Converters

Dang

Kwak

2020

Sensors

View full text Add to dashboard Cite

Capacitors are critical components of power converter systems as they influence the cost, size, performance, and scale of such systems. However, capacitors exhibit the highest degeneration and breakdown rates among all power converter components due to their wear-out failures and short lifespans. Therefore, condition monitoring is a vital process to estimate the health status of capacitors and to provide predictive maintenance for ensuring stability in the operation of power converter systems. The equivalent series resistance (ESR) and the capacitance of the capacitor are two widely used parameters for evaluating the health status of capacitors. Unlike the ESR, the capacitance of a capacitor is suitable for the health monitoring of various types of capacitors; therefore, it is more preferable for large-scale systems. This paper presents an overview of previous research addressing this aspect of capacitors and provides a better understanding of the capacitance monitoring of capacitors utilized in power converter systems.

show abstract

“…e inverter is the core component of the ship's electric propulsion system. e failure of the DC link capacitor is one of the most common faults of the inverter [24]. Due to the different operating environments and different types of electric propulsion systems, the degree and characteristics of capacitor attenuation are irregular and uncertain.…”

Section: A Simulation Model For a Marine Electric Propulsionmentioning

confidence: 99%

Fault Diagnosis of Capacitance Aging in DC Link Capacitors of Voltage Source Inverters Using Evidence Reasoning Rule

Liao

Gao

et al. 2020

Mathematical Problems in Engineering

View full text Add to dashboard Cite

Capacitance aging of DC link capacitors in voltage source inverters (VSIs) is a common fault which can lead to instability of the DC voltage. In such a failure state, although the VSI can still work, its performance gradually deteriorates, resulting in a shorter service life of the equipment. Here, an online monitoring and fault diagnosis method for capacitance aging based on evidence reasoning (ER) rule is presented. Features from the DC link voltage data with different levels of capacitance aging are extracted, and data features are generated as pieces of diagnostic evidence, which are then combined according to the ER rule. Finally, capacitance aging fault levels were estimated using the combined results. This method has better diagnostic performance compared to a backpropagation (BP) neural network approach and can be used to flexibly define the relative weighting of each evidence parameter depending on the application. This approach can therefore be widely used for fault diagnosis of an array of different devices.

show abstract

Noninvasive Online Condition Monitoring of Output Capacitor’s ESR and C for a Flyback Converter

Cited by 38 publications

References 19 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

Review of Health Monitoring Techniques for Capacitors Used in Power Electronics Converters

Fault Diagnosis of Capacitance Aging in DC Link Capacitors of Voltage Source Inverters Using Evidence Reasoning Rule

Contact Info

Product

Resources

About