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A.M.R. Amaral
Researcher at Polytechnic Institute of Coimbra
Publications - 44
Citations - 921
A.M.R. Amaral is an academic researcher from Polytechnic Institute of Coimbra. The author has contributed to research in topics: Capacitor & Electrolytic capacitor. The author has an hindex of 16, co-authored 41 publications receiving 779 citations. Previous affiliations of A.M.R. Amaral include University of Coimbra & Instituto Superior de Engenharia de Coimbra.
Papers
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A Simple Offline Technique for Evaluating the Condition of Aluminum–Electrolytic–Capacitors
TL;DR: This paper presents a very simple technique to estimate the condition of aluminum-electrolytic-capacitors based on the estimation of both the ESR and capacitance values.
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On-line fault detection of aluminium electrolytic capacitors, in step-down DC-DC converters, using input current and output voltage ripple
TL;DR: In this paper, a simple on-line fault detection technique that is able to prevent structural failures in aluminium electrolytic capacitors used in the output filter of step-down DC-DC converters is presented.
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An Online and Noninvasive Technique for the Condition Monitoring of Capacitors in Boost Converters
TL;DR: A novel noninvasive technique for capacitor diagnostic in Boost converters is presented that can easily be applied online and even in real time, and it is suitable for the operation in both continuous current mode (CCM) and discontinuousCurrent mode (DCM).
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An Economic Offline Technique for Estimating the Equivalent Circuit of Aluminum Electrolytic Capacitors
TL;DR: This paper presents an experimental technique that allows the determination of both reactance and equivalent series resistance (ESR) intrinsic values of aluminum electrolytic capacitors and compares with the manufacturers' specifications for four different capacitors to validate the proposed technique and demonstrate its applicability.
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Condition Monitoring of Metallized Polypropylene Film Capacitors in Railway Power Trains
G.M. Buiatti,Juan A. Martin-Ramos,A.M.R. Amaral,Piotr Dworakowski,Antonio J. Marques Cardoso +4 more
TL;DR: A novel technique for monitoring the condition of metallized polypropylene film (MPPF) capacitors installed in the dc link of railway power trains is proposed, based on the capacitance estimation of the two different capacitors used in thedc link, and it is done without adding any extra sensor or filter to the respective traction drive scheme.