The essential difference between an AC generator and a DC generator is that: *
a) Armature with coil
b) Slip rings with split rings
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AC generator has slip rings. A slip ring is an electromechanical device that allows the transmission of power and electrical signals from a stationary to a rotating structure. A slip ring can be used in any electromechanical system that requires rotation while transmitting power or signals.
DC generator has a commutator. The commutation in DC machine or more specifically commutation in DC generator is the process in which generated alternating current in the armature winding of a dc machine is converted into direct current after going through the commutator and the stationary brushes.
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