Electrolytic Capacitor Age Estimation Using PRBS-based Techniques
Conference: PCIM Europe 2016 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/10/2016 - 05/12/2016 at Nürnberg, Deutschland
Proceedings: PCIM Europe 2016
Pages: 8Language: englishTyp: PDF
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Authors:
Hewitt, David A.; Green, James E.; Davidson, Jonathan N.; Foster, Martin P.; Stone, David A. (Department of Electronic and Electrical Engineering, University of Sheffield, Mappin Street, Sheffield, S1 3JD, UK)
Abstract:
Electrolytic capacitors form a major part of most power electronic converters. System failures which can be directly attributed to electrolytic capacitors account for a particularly large proportion. In normal service, rather than failing instantly, capacitors tend to deteriorate through reduced capacitance and increased equivalent series resistance. Early detection of these changes permits mitigating action to be taken prior to failure. In this paper, a method of characterising these parameters using a pseudorandom binary sequence (PRBS) system identification approach is proposed as part of the development of a prognostic system for passive components in power electronic systems.