Answer / shubham

Hysteresis loss: The area enclosed by the B-H curve of the
magnetic material is the hysteresis loss. Hysteresis loss is
the power loss that occurs due to magnetization and
demagnetization of a magnetic material

Eddy current:Energy loss due to undesired eddy currents
circulating in a magnetic core. The circulating eddies of
current create induced magnetic fields that oppose the
change of the original magnetic field due to Lenz's law,
causing repulsive or drag forces between the conductor and
the magnet

Answer / sreenadh.ch

DUE TO REVERSAL OF MAGNETIC FLUX SOME LOSS WILL OCCUR.EX:
IN DC MACHINES CONDUCTOR ON THE ARMATURE PASSES THROUGH
NORTH POLE AND SOUTH POLE.SO HERE THE MAGNETIC REVERSAL
TAKES PLACE.EDDY CURRENT LOSS WILL OCCUR DUE TO LEAKAGE
FLUX.THIS LEAKAGE FLUX WILL CREATE EDDY EMF IN NEAR BY
METALS AND THIS EMF CREATES EDDY CURRENTS.DUE TO THESE
CURRENTS SOME LOSS WILL OCCUR.

Answer / mathenjwa xm

Hysterisis losses are losses due to magnetization,it is the area between B-H.it is the loss due to reversal of intercore.



Eddy current loss,as the armature rotates in a DC machine ,it induces the back emf ,this emf has high current ,which is Eddy current.

Answer / raj

hysteresis loss: some material had character like keep
storing magnetic enery in that. so loss of flux will occur.
this is hysteresis. this can be neglect by using silicon
steel.having high permiability.

eddy loss: current flows in metal creats its own flux and
crets a emf in it. this is back emf or eddy current .this is
due to main flux , this new back emf produses the flux and
oppose the main flux. hence loss occur.
this can be overcome by proper lamination.

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