Core losses in magnetic materials at very high flux densities when the flux is not sinusoidal

Magnetic losses at high flux densities in nonoriented Fe–Si alloys

“…the power factor falls to very low values) [2]. Consequently, in order to overcome the large errors associated with the standard approach, the application of thermometric techniques is often invoked, because the related measuring accuracy is not influenced by the low power factor [3][4][5]. On the other hand, the associated measuring process is vexed by difficulties in the control of the voltage waveform, and the ensuing flux distortion may add large uncertainty to the determined loss figure.…”