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Experimental Study of Dielectric Insulator Behavior under High Voltage Pulse

Abstract : Nowadays, in pulsed power applications, during the design of a modulator, it is necessary to take into account all problems linked to insulators and their capability to withstand a dielectric strength. Indeed, many of these modulators integrate transformers, allowing a significant increase of voltage. So, the first objective is to provide an adequate insulation to maintain compact size. This paper deals with the conception of a multi-primary pulse transformer, allowing a voltage increase of 40kV to 600kV with durations of 1μs. The constraints related to the size of the insulation have a direct impact on the value of the stray elements (leakage inductance and primary/secondary stray capacitance) which is directly related to the pulse waveform. It is therefore important to define a sufficient insulation without over-dimensioning it. An important criterion concerning the choice of the material is its dielectric strength but generally, the latter is characterized according to the IEC standard 60243-1 which defines this behaviour under DC and AC conditions. The data is not provided in pulsed mode. The problematic is then to choose a dielectric material without knowing this data. The aim of this paper is to carry out a comparative study of the dielectric properties of materials commonly used in pulsed power modulators in order to compare their behaviour in pulsed mode in relation to AC/DC mode. [no pdf]
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https://hal-univ-pau.archives-ouvertes.fr/hal-02372183
Contributor : Siame Labo <>
Submitted on : Wednesday, November 20, 2019 - 11:49:28 AM
Last modification on : Friday, November 27, 2020 - 3:31:02 AM

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  • HAL Id : hal-02372183, version 1

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Florian Allard, Jean-Pierre Brasile, Antoine Silvestre de Ferron, Sylvain Paquet, Laurent Pecastaing, et al.. Experimental Study of Dielectric Insulator Behavior under High Voltage Pulse. 21th IEEE Pulsed Power Conference, Jun 2017, Brighton, United Kingdom. ⟨hal-02372183⟩

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