Rise of flux in solid iron core due to impact excitation

In designing machines and apparatus with solid magnetic circuits, flux/time curves have often to be predetermined to secure a desired rapidity of response. Their prediction has hitherto been uncertain, especially in the presence of saturation. In the paper, an attempt is made to derive the equations for the rise of flux and current on the basis of a limiting non-linear theory. This results in an original treatment and gives a greater insight into the physical phenomena involved in the magnetization of a core due to impact excitation. The results obtained from these equations compare favourably with test results.