B-H Curve Hysteresis, Hysteresis Loop including B-H Curve, Hysteresis Loss

HYSTERISIS LOSS - B-H CURVE - DERIVATION FOR THE HYSTERESIS LOSS

In the state of Ferromagnetic Substances the magnetic domain form closed chain due to which the net magnetic moment of the substance is zero. When the substance is placed in an external magnetic field, the domains rotate and arrange themselves such that their magnetic moment becomes in the direction of external magnetic field. Work is done by the external magnetic field in this alignment. But on removal of the external magnetic field, these domains could not come back to their initial state and some magnetism is left within the substance. Hence some amount of energy is not returned back to demagnetization. Thus in each Hysteresis loop there is some loss in energy. This energy loss is called Hysteresis Loss.