Rapid coil calculations for magnetic devices

The relationships existing between the various physical and electrical quantities encountered in the design of coils for electromagnetic devices are derived by setting up simple equations. These are evaluated and the results displayed in nomographical form, thus providing a means whereby the values of all the important parameters may be settled quickly and with sufficient accuracy for most engineering purposes. The question of the power required, and the current density involved in producing a specified value of ampere turns in a winding, is given special emphasis. Although the charts are primarily intended for the solution of coil problems associated with solenoid-operated devices, this by no means defines their scope. In general it is true to say that the nomograms may be applied usefully to the design of practically any coil winding.