Prediction of dynamic hysteresis loops of nano-crystalline cores

Dynamic hysteresis loops of a range of nano-crystalline cores have been obtained over a wide frequency range (1–50 kHz). A dynamic hysteresis model from measurements using an artificial neural network trained by the delta-bar-delta learning algorithm has been developed. The input parameters include the geometrical dimensions of cores, peak magnetic induction and magnetizing frequency. The results show the neural network model has an acceptable estimation capability for dynamic hysteresis loops of toroidal nano-crystalline cores.