Electrical capacitor having alternating metallized nonheat- shrinkable dielectric layers and heat-shrinkable dielectric layers

摘要

An electrical capacitor is formed by winding alternating layers of single-sided metallized nonheat-shrinkable dielectric material and of a heat-shrinkable dielectric material together. Radial leads are secured to the ends of the capacitor after it is wound by heating the leads and forcing them into the ends of the dielectric materials. The heat- shrinkable layers effectively seal off the electrodes from each other. In addition, the heat-shrinkable dielectric layers may provide higher current capacities, improved dissipation factor, better control over the temperature vs. capacitance characteristic of the capacitor, improved corona threshold voltage and improved control over the final value of the wound capacitor.