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Minimization of the stray inductance in metallized capacitors: Connections and winding geometry dependence

Published online by Cambridge University Press:  15 October 1998

S. Siami
Affiliation:
Laboratoire d'Électrotechnique de Montpellier, Université Montpellier II, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
N. Daudé*
Affiliation:
Laboratoire d'Électrotechnique de Montpellier, Université Montpellier II, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
Ch. Joubert
Affiliation:
Laboratoire d'Électrotechnique de Montpellier, Université Montpellier II, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
P. Merle
Affiliation:
Laboratoire d'Électrotechnique de Montpellier, Université Montpellier II, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France
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Abstract

Stray inductance in power electronics capacitors is due to themagnetic field created by the currents in winding and connections. Wereview different connection schemes that could be used in metallizedcapacitors. For each of these connections, the stray inductance expressiondepends of winding geometries. The proposed method to minimize thisinductance can be divided in two parts. The first part consists in optimizing the winding geometry for a particular connection. The second isthe choice of a low-inductance connection for the previously determinedwinding. The best results are obtained with large inner and outer radii andthrough the use of inner annular conductors.

Keywords

Type
Research Article
Copyright
© EDP Sciences, 1998

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