Proceedings ArticleDOI
ESR estimation method for DC-DC converters based on improved EMD algorithm
Guohui Wang,Yong Guan,Jie Zhang,Lifeng Wu,Xueyuan Zheng,Wei Pan +5 more
- pp 1-6
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TLDR
In this paper, the performance degradation of electrolytic capacitors reflects in electrical parameters, mainly the Equivalent Series Resistance (ESR) and capacitance, and the best indicator of the output filter capacitor failure is the increase of ESR.Abstract:
Aluminum electrolytic capacitors are usually used in DC-DC converters as smoothing capacitors. According to the statistics data, they are the weakest among various power components in the DC-DC converter. With the increase of the running time, the performance degradation of electrolytic capacitors reflects in electrical parameters, mainly the Equivalent Series Resistance (ESR) and capacitance. The best indicator of the output filter capacitor failure is the increase of ESR. And the output ripple voltage of the converter increases with respect to ESR. Monitoring the ESR variation of the electrolytic capacitor, achieving by voltage and current ripple, can estimate the health state of the converter.read more
Citations
More filters
Journal ArticleDOI
A Review of the Condition Monitoring of Capacitors in Power Electronic Converters
TL;DR: In this paper, the authors classified the capacitors condition monitoring methods into three categories and summarized the state-of-the-art research and the future opportunities targeting for industry applications.
Journal ArticleDOI
An Overview of Condition Monitoring Techniques for Capacitors in DC-Link Applications
TL;DR: A comprehensive review and comparison of CM schemes for different types of dc-link applications with emphasis on the application objectives, implementation methods, and monitoring accuracy when being used is provided.
Journal ArticleDOI
A Current-Sensorless Online ESR and C Identification Method for Output Capacitor of Buck Converter
TL;DR: A noninvasive online identification method of capacitor's ESR and capacitance for continuous-conduction mode (CCM) buck converter is proposed in this article, based on the ac component of capacitor voltage, the calculation model is founded.
Journal ArticleDOI
Online Monitoring Technique for Aluminum Electrolytic Capacitor in Solar PV-Based DC System
TL;DR: A method for health monitoring of AEC using the parameters measured for maximum power point tracking (MPPT) (PV voltage and current) is proposed, thereby offering a low-cost solution.
Journal ArticleDOI
An Online Monitoring Scheme of DC-Link Capacitor's ESR and C for a Boost PFC Converter
TL;DR: In this paper, a non-invasive online monitoring method of DC-link capacitors' ESR and capacitance for boost power factor correction (PFC) converter is proposed.
References
More filters
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The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis
Norden E. Huang,Zheng Shen,Steven R. Long,Man-Li C. Wu,Hsing H. Shih,Quanan Zheng,Nai-Chyuan Yen,C. C. Tung,Henry H. Liu +8 more
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Proceedings ArticleDOI
Life prediction modeling of bus capacitors in AC variable frequency drives
TL;DR: In this paper, a multiple component model for capacitor impedance, a motor drive simulation to create ripple current waveforms, a heat transfer model based on bank geometry, and a capacitor life model derived from the device physics of failure is presented.
Journal ArticleDOI
A Real-Time Predictive-Maintenance System of Aluminum Electrolytic Capacitors Used in Uninterrupted Power Supplies
TL;DR: In this paper, a low-cost method to realize a real-time condition monitoring and a predictive maintenance system of an electrolytic capacitor used in uninterruptible power supplies (UPSs) is presented.
Proceedings ArticleDOI
Electrolytic capacitor life testing and prediction
TL;DR: The aluminum electrolytic capacitor is widely used in various power electronic circuits and systems such as 3-phase PWM inverters as discussed by the authors, its functions include bus voltage stabilisation, conduction of ripple current due to switching events, etc.
Proceedings ArticleDOI
A life prediction scheme for electrolytic capacitors in power converters without current sensor
H. M. Pang,Pong M. H. Bryan +1 more
TL;DR: In this paper, a sensorless current waveform prediction method is proposed to predict the expected life of switching power supply. But, the method is limited to the case of capacitors.
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