Peak voltages induced by accelerated flux reversal in reactor cores operating above saturation density

The existence of peak voltages in the windings of many sorts of series transformers and reactors, when abnormal conditions force the flux density above saturation, has been understood in a qualitative manner for many years. This paper will derive means for calculating these voltages for the various combinations of magnetizing force and rate of variation. The close agreement between test and calculation over a wide range of magnetizing forces indicates the accuracy and general applicability of the method.