Current‐sensorless online ESR monitoring of capacitors in boost converter

Tang, Shengxue; Dong, Shengjie; Liu, Yajing; Zhang, Qiran

doi:10.1049/joe.2018.8596

Cited by 11 publications

(5 citation statements)

References 14 publications

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“…In [60], the estimation of ESR is done by utilizing the relation between the output voltage ripple, input current, and temperature multipliers. On the other hand, [61] proposes a method for ESR calculation by sampling two specific periods of the output voltage within a switching cycle. However, this method involves a relatively complex calculation model and requires additional hardware for the measurement process.…”

Section: ) Monitoring Technique Applicable To Both Type Of Filter Con...mentioning

confidence: 99%

Advances in Capacitor Health Monitoring Techniques for Power Converters: A Review

Ramees,

Ahmad

2023

IEEE Access

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Capacitors play a critical role in power electronic systems, and their health and performance directly impact system reliability and efficiency. This article provides an overview of advanced techniques developed for capacitor monitoring, focusing on diagnosing, estimating, and predicting capacitor health in various power electronic converters. The condition monitoring techniques are categorized based on the type of converter, and a comprehensive review and comparison of various methods are provided within each category. The article covers various techniques, including impedance spectroscopy, frequency response analysis, harmonic analysis, wavelet analysis, short-time Fourier transform, and algorithm-based predictive models. These techniques enable early detection of capacitor faults, accurate estimation of capacitance and equivalent series resistance (ESR), and prediction of the remaining useful life of capacitors. By implementing these advanced monitoring techniques, engineers and researchers can enhance system reliability, prevent unexpected failures, and optimize maintenance and replacement strategies for capacitors in power electronic systems.

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Section: ) Monitoring Technique Applicable To Both Type Of Filter Con...mentioning

confidence: 99%

Advances in Capacitor Health Monitoring Techniques for Power Converters: A Review

Ramees,

Ahmad

2023

IEEE Access

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“…To reduce the use of sensors, current-sensorless monitoring methods of C and ESR are proposed for a continuous conduction mode (CCM) Buck converter, for a CCM flyback converter and a discontinuous conduction mode (DCM) flyback converter, respectively in [18][19][20]. Similar methods are applied to a CCM boost converter in [21] and realized for DCM in [22]. However, these current-sensorless methods are affected by other parameters such as the duty cycle and filter inductance.…”

Section: Introductionmentioning

confidence: 99%

ESR Estimation Schemes of Output Capacitor for Buck Converter from Capacitor Perspective

2020

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The aluminum electrolytic capacitor (AEC) is one of the most vulnerable parts in power electronic converters and its reliability is crucial to the whole system. With the growth of service time, the equivalent series resistance (ESR) increases and the capacitance (C) decreases due to the loss of electrolytes, which will result in extra power loss and even damage to transistors. To prevent significant damages, the AEC must be replaced at an optimal period and online health monitoring is indispensable. Through the analysis of degradation parameters (ESR and C), ESR is proved to be a better health indicator and therefore is determined as the monitoring parameter for AEC. From the capacitor perspective, ESR estimation schemes of output capacitors for a Buck converter are studied. Based on the voltage–current characteristics, two ESR calculation models are proposed, which are applicable for both continuous conduction mode (CCM) and discontinuous conduction mode (DCM). From the point of implementation view, the advantages and disadvantages of the two estimation schemes are pointed out, respectively. A Buck prototype is built and tested, and simulation and experimental results are provided to validate the proposed ESR estimation schemes.

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“…With the increasing operation time, the performance of the components including the electrolytic capacitor, power devices and inductance etc. will degrade under many types of stresses such as the voltage, temperature, humidity and radiation stresses [3]. These situations can cause the DC-DC converter working anomalously, or even affect the entire electrical system.…”

Section: Introductionmentioning

confidence: 99%

Incipient fault diagnosis method for DC–DC converters based on sensitive fault features

Jiang

Liu³

et al. 2020

IET power electron.

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DC-DC converters play an important role in electrical systems. The fault state of a DC-DC converter has a major impact on the operation of the back-end components and the entire electrical system. Therefore, the fault diagnosis is very necessary when the fault state of DC-DC is in the early stage. It can decrease the likelihood of happening the serious faults that may result in the enormous economic loss. To effectively diagnose the incipient fault in DC-DC converters, an incipient fault diagnosis method based on sensitive fault features is proposed. Firstly, for each type of the incipient fault, this study obtains the statistical features in time domain and the wavelet analysis local energy values in the frequency domain of the output. Then to further improve the incipient fault diagnosis accuracy, this study removes the redundant fault features based on overlap calculation, the unique fault features for each type of incipient fault will be selected. Finally, these sensitive fault features are used to build support vector data description models, which can diagnose the incipient faults. Simulation and hardware experimental results validate the practicability and effectiveness of the proposed method.

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Current‐sensorless online ESR monitoring of capacitors in boost converter

Cited by 11 publications

References 14 publications

Advances in Capacitor Health Monitoring Techniques for Power Converters: A Review

Advances in Capacitor Health Monitoring Techniques for Power Converters: A Review

ESR Estimation Schemes of Output Capacitor for Buck Converter from Capacitor Perspective

Incipient fault diagnosis method for DC–DC converters based on sensitive fault features

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