Conference Paper


M. Rigamonti, P. Baraldi, E. Zio, D. Astigarraga, A. Galarza. A Particle Filtering-Based Approach for the Prediction of the Remaining Useful Life of an Aluminum Electrolytic Capacitor. PHME 2014 Conference, July 8th-10th, Nantes, France.


This work focuses on the estimation of the Remaining Useful Life (RUL) of aluminum electrolytic capacitors used in electrical automotive drives under variable and non-stationary operative conditions. The main cause of the capacitor degradation is the vaporization of the electrolyte caused by a chemical reaction. Capacitor degradation can be monitored by observing the capacitor Equivalent Series Resistance (ESR) whose measurement is heavily influenced by the measurement temperature, which, under non-stationary operative conditions, is continuously changing. In order to define a degradation indicator for aluminum electrolytic capacitor which is independent from the measurement temperature and, thus, can be used for real applications under variable operative conditions, in this work we propose a novel indicator based on the ratio between the ESR measured on the degraded capacitor and the ESR expected value on a new capacitor at the present operational temperature. The definition of this indicator has required the investigation of the relationship between ESR and temperature on a new capacitor by means of experimental laboratory tests. Finally, the prediction of the capacitor degradation and its failure time has been performed by resorting to a Particle Filtering-based prognostic technique.


Link to the Conference: http://www.phmsociety.org/






Project acronym:

Project name:
 Electrical powertrain Health Monitoring for Increased Safety of FEVs

Project reference:

Start date: 01/06/2012
End date: 30/11/2014

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