Observation of electrolytic capacitor ageing behaviour for the purpose of prognostics
Hewitt, D., Green, J., Davidson, J. et al. (2 more authors)
(2016)
Observation of electrolytic capacitor ageing behaviour for the purpose of prognostics.
In:
IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society.
IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society, 24-27 Oct 2016, Florence, Italy.
IEEE
ISBN 978-1-5090-3474-1
Abstract
Electrolytic capacitors are an important
component within power electronics systems which are known to
exhibit poorer reliability compared to other components within
the system. In this paper, the changes in electrical parameters
(capacitance and equivalent series resistance) which occur as
electrolytic capacitors age are characterised at regular intervals
over the life of the capacitors. Ageing is observed under three
different bias conditions: no bias; constant voltage bias and
square wave excitation and at two different ambient
temperatures. The data captured within this work presents the
changes in capacitor properties from new, reaching to a point
which the capacitor parameters have changed sufficiently, such
that the capacitor can be considered to have failed. Such data will
prove valuable in the development of a system designed to
determine the state of health of a capacitor, or could be used to
predict its remaining useful lifetime.
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