Eur. Phys. J. AP
Volume 14, Number 2, May 2001
|Page(s)||107 - 114|
|Section||Surfaces, Interfaces and Films|
|Published online||15 May 2001|
In situ characterisation of non linear capacitors
Laboratoire de Génie Électrique de Toulouse - Université Paul Sabatier,
118 route de Narbonne, 31062 Toulouse Cedex 4, France
2 Laboratoire d'Électrotechnique et d'Électronique Industrielle INP-ENSEIIHT, 2 rue Camichel, 31062 Toulouse Cedex, France
3 Laboratoire d'Analyse et d'Architecture des Systèmes du CNRS, 7 avenue du Colonel Roche, 31077 Toulouse Cedex 4, France
Corresponding author: email@example.com
Revised: 19 March 2001
Accepted: 19 March 2001
Published online: 15 May 2001
Multilayers ceramic capacitors (MLCC) presenting non linear behaviours of their C(V) characteristics may have interesting applications in power electronics. Most of them have already been described. Nevertheless, the choice of a particular type instead of another one is all the more so difficult since, on one hand the physical mechanisms able to explain this behaviour is far from being understood. On the other hand, C(V) characteristics are in general obtained for low voltage values different from the ones they are going to be involved in. In this paper, direct in situ characterisations of different BaTiO3 based capacitors commercially available are achieved. The role of the capacitors' type (X7R,Z5U), of the temperature and of the voltage waveform (and more particularly its polarity) is demonstrated. Temperature values up to 200 °C are measured during normal operations in a RCD dissipative snubber without any alterations of the C(V) characteristics. All these results are discussed as regards the main physical properties of the constitutive materials in order to reach an optimisation of their use through an appropriate dimensioning.
PACS: 77.22.-d – Dielectric properties of solids and liquids / 77.80.-e – Ferroelectricity and antiferroelectricity / 77.84.-s – Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials
© EDP Sciences, 2001
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.