Study of short-pulse dielectric strength of chip capacitors. Part I: The main experimental results

Energetics. Electrical engineering

The goal of the paper is testing the short-pulse dielectric strength of chip capacitors and lightning impulse testing with subsequent failure analysis. The experimental setups are developed in order to determine the short-pulse dielectric strength and lightning impulse withstand voltage. The distribution functions of these characteristics have been found to follow the normal distribution. The oscillograms of current and voltage across the capacitors are presented, as well as the dependence of the capacitance and dissipation factor on the testing impulse voltage magnitude. A brief failure analysis is carried out. The main failure mechanisms are highlighted. The obtained results will be the basis for the method of preliminary estimation of short-pulse dielectric strength in chip capacitors.