Core Losses Separation of Amorphous Alloy Core

In this paper, the core losses of Fe 80 Si 9 B 11 , Fe 78 Si 9 B 13 amorphous alloy cores were separated to investigate the behaviors of hysteresis loss, eddy current loss and additional loss in high frequency range. The results showed that the losses of amorphous alloy core were mainly composed of hysteresis loss in low frequency. With the increase of frequency, eddy current loss increased drastically compared with the hysteresis loss, the eddy current loss was greater than the hysteresis loss when the frequency was higher than 5 kHz and 6 kHz for amorphous alloy with the composition of Fe 78 Si 9 B 13 and Fe 80 Si 9 B 11 , respectively. The eddy current loss proportion in total loss increased with the increment of frequency.