Comparison of Aluminum Electrolytic Capacitor Lifetimes Using Accelerated Life Testing

Gulbrandsen, Stephani; Arnold, Joelle; Caswell, Greg; Cartmill, Ken

doi:10.4071/isom-wp25

Cited by 5 publications

(3 citation statements)

References 5 publications

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“…If at final times T1 and T2, it was decided that all the three conditions were fulfilled, then that capacitor was said to be failed (Gulbrandsen et al, 2014). After analysing each and every capacitor, the average fail time was calculated for group A and group B eligible capacitors, who fulfilled the failure criteria, as per the following equation:…”

Section: Experimental Results and Analysismentioning

confidence: 99%

Condition monitoring of aluminium electrolytic capacitors using accelerated life testing

Bhargava

Banga

Singh

2018

IJQRM

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Purpose An electrolytic capacitor is extensively used as filtering devices in various power supplies and audio amplifiers. Low cost and higher value of capacitance make it more well known. As environmental stress and electrical parameters increase, capacitors degrade on accelerated pace. The paper aims to discuss these issues. Design/methodology/approach This paper focusses on the impact of thermal stress on electrolytic capacitors using accelerated life testing technique. The failure time was calculated based on the change in capacitance, equivalent series resistance and weight loss. The experimental results are compared with the outcome of already available life monitoring methods, and the accuracy level of these methods is accessed. Findings The results of all the three methods are having maximum 55 per cent accuracy. To enhance the accuracy level of theoretical methods, modifications have been suggested. A new method has been proposed, whose outcome is 92 per cent accurate with respect to experimentally obtained outcomes. Practical implications To assess the capacitor’s reliability using an experimental and modified theoretical method, failure prediction can be done before it actually fails. Originality/value A new method has been proposed to access the lifetime of capacitor.

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Section: Experimental Results and Analysismentioning

confidence: 99%

Condition monitoring of aluminium electrolytic capacitors using accelerated life testing

Bhargava

Banga

Singh

2018

IJQRM

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“…To validate this proposed method, accelerated life testing is conducted. Gulbrandsen et al 24 have analysed lifetime of an electrolytic capacitor using practical methods.…”

Section: Validation Using Experimental Methodsmentioning

confidence: 99%

An intelligent prognostic model for electrolytic capacitors health monitoring: A design of experiments approach

Bhargava

Banga²,

Singh

2018

Advances in Mechanical Engineering

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In the world of fast-growing technology, the electronic gadgets become obsolete with the invention of advanced technology. Reuse of electronic components is a philosophy now being applied to all manufacturing industries to achieve the goal of reuse technology. The accurate assessment of residual life is of great significance for reuse as well as the successful operation of the application. The prediction of failure before it occurs will, in turn, reduce the repairing cost and strengthen the reputation of the manufacturer in real-time market. This article reports a novel technique to explore the residual life of electrolytic capacitor and validates it, using accelerated life testing. The optimization and evaluation of proposed technology are accomplished using design of experiments methodology, that is, Taguchi's approach to designing the experiments. Prediction of residual life of capacitor is done using regression and artificial neural networks technique. A decision support system is prepared using fuzzy logic, which monitors the current health status of the capacitor and directs the user accordingly. Using six environmental stress and electrical parameters, the actual lifetime of the electrolytic capacitor is accessed, which has been proven as a valid and accurate technique, exhibiting error rate of 2.99%.

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“…However, ECs have some undesired characteristics such as short lifetime, low reliability and high sensitivity to temperature and frequency 13,14 . At rated temperature, the lifespan of the ECs are only about 10K hours 15 , which is far shorter than that of other components in a converter. The failure rate of ECs aggravates as they age, and thus there is a high probability of breakdown, rupture and explosion under harsh conditions 16 .…”

Section: Introductionmentioning

confidence: 98%

Three Electrolytic Capacitor Elimination Schemes in Quasi-Z-Source Converter: Theory and Experimental Verification

Hong

Zhang

et al. 2023

Preprint

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Electrolytic capacitors (ECs) are important components in power converters. However, their lifespan is much shorter than other components, and their sizes increase greatly with larger capacitance. As a result, ECs limit power converters’ lifespans and contribute to larger sizes. This study proposes three schemes of eliminating ECs in the quasi-Z-source DC-DC converter (QZSC). In scheme A, a non-electrolytic capacitor quasi-Z-source DC-DC converter (NEC-A-QZSC) is realized to minimize the converter size and with low-cost design, but has high voltage ripples. The schemes B and C are then proposed to add a low-pass filter to different voltage ports on QZSC to reduce output voltage ripples with the same boost capability, hence achieving a better performance and stability. For proof of concept, theoretical analysis with small-signal models, simulation studies and prototype experiments of the proposed NEC-QZSC converter are presented. Simulation and experimental results well agree with the theoretical analysis. The NEC-QZSCs proposed in the schemes B and C achieve small converter sizes while improving the voltage conversion performance, realizing better nonlinear response, and having high economic advantages.

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Comparison of Aluminum Electrolytic Capacitor Lifetimes Using Accelerated Life Testing

Cited by 5 publications

References 5 publications

Condition monitoring of aluminium electrolytic capacitors using accelerated life testing

Condition monitoring of aluminium electrolytic capacitors using accelerated life testing

An intelligent prognostic model for electrolytic capacitors health monitoring: A design of experiments approach

Three Electrolytic Capacitor Elimination Schemes in Quasi-Z-Source Converter: Theory and Experimental Verification

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