Thermal Breakdown of Silicone Liquids under Pulsed High-Frequency Field

DOI DOI

Search this article

Description

There have been some previous studies on the electrical breakdown of liquid dielectrics under high frequency fields, and it is generally recognized that the mechanism of breakdown must be a thermal process caused by dielectric heating.1,2 The thermal breakdown phenomenon is described by the following thermal conduction equation cρ ∂θ/∂t = div(K grad θ) + σE2 (1) where θ, cρ, k, and σ represent the temperature, specific heat per unit volume, thermal conductivity and equivalent electrical conductivity of the dielectric, and E is the applied field. Mainly because of complexity of the temperature dependence of electrical conductivity, solutions of this equation cannot, in general, be obtained. However, silicone liquids exhibit a temperature dependence of conductivity which is smaller and simpler than that of many other liquids, and for such materials, it is possible to obtain an approximate solution to Eq. (1).

Journal

Details 詳細情報について

Report a problem

Back to top