Why is the armature of a dc machine made of silicon steel?
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An a armature winding of DC motor is connected to a rotating part of the machine called rotor. It goes through an alternating magnet field. This results in magnetic losses.
Because of magnetic losses, rotor is built using armature core which in turn is made with many low-hysteresis silicon steel lamination. These lamination are stacked together to create cylindrical structure. Thus hysteresis and eddy current loss are reduced.
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