Effect of winding tension/space factor and edge margin on performance of a perfluorocarbon liquid/plastic film capacitor

Data is presented showing the average space favor (the ratio of the space between foil and film layers expressed as a percentage of the total dielectric film thickness) for test capacitor rolls as a function of winding tension, as well as the methodology of determining the space factor for cylindrical rolls. The variability of the space factor within capacitor rolls for each of the five candidate winding tensions is also presented. Capacitor performance, as measured by three destructive (D-test) methods, is then given for capacitors with rolls fabricated as selected space factors (winding tensions) for two subgroups of units with edge margin as the second variable. These results indicate that performance can be greatly enhanced by careful selection of these two design parameters, i.e. space factor and edge margin. Finally, a performance summary for the same capacitor is presented with the type of electroding system as the process variable. Details of this study were presented at the 1988 CARTS Europe conference. 5 refs., 5 figs., 1 tab.