Computer design of an inductor carrying direct current

In order to eliminate the tedious task of measurement and data plotting in the design of an inductor having a specified minimum inductance at a given level of direct current, two computer programs have been developed. We need only to determine the effect of magetizing force on the permeability of a sample closed core with no air gap. One computer program accepts this information and generates the characteristics of a variety of uniform core sizes, displaying the results by means of a plotting routine. Another program, using the same information, accepts requirements in terms of minimum inductance at a specified direct current and calculates the number of turns, wire size, and necessary air gap for as many as ten suitable configurations.