Magnetic forces in idealised saturable-pole configurations

Conditions for the validity of scaling of nonlinear magnetic fields are presented and applied to an idealised form of the fundamentally important saturable overlapping rectangular-pole configuration. This allows the dependence of force on other problem variables to be expressed in a surprisingly simple and generalised way and economises very significantly on tedious numerical work. Results confirm and more extensively quantify the curious force-augmenting effects of saturation and the tendency to linear rather than square-law dependence of force on m.m.f.