The AC generator generates an output voltage which alters in amplitude as well as time whereas the DC generator generates a constant output voltage which does not change in amplitude as well as time.
The electrical energy we utilize has two fundamental types, one is known as Alternating while the other one is Direct. The electric power in homes has alternating current and voltages, but in an automobile currents and voltages are constant. Both types have their own particular uses whereas the technique of producing the both is same, which is called electromagnetic induction. The machines which produce an electric power are called generators, and AC and DC generators are different from each other by the method they apply to pass the produced current to the external circuit.
The key differences between AC and DC Generator are discussed here on the basis of real-world factors such as output power, current induction type, brushes & maintenance, voltage level, commutation process, and types.The following table presents the key differences between AC Generator and DC Generator.
Difference between AC Generator and DC Generator
|Generates AC electric power
|Produces DC electric power
|it has slip-rings
|it uses a split-ring commutator
|Output current can be induced either in the rotor or in the stator
|Output current is induced in the rotor ONLY
|Slip-rings have smooth and uninterrupted surfaces, which allow the brushes to remain in contact uninterruptedly with the slip ring surfaces.
Hence, the brushes do not wear as quickly as in case of a DC generator and there is almost no possibility of a short circuit.
|Commutators and brushes wear out very quickly thus a short circuit is possible in the commutator because of sparking.
|Requires very less maintenance and thus more reliable than a DC Generator
|It requires frequent maintenance
|Used to generate very high voltages
|Used to generate comparatively lower voltages
|It Does not have commutators
|It possesses commutators in order to counter the changing polarities effect.
|AC voltage can be distributed quite easily using transformers.
|DC Voltage is comparatively difficult to distribute efficiently.
|Rotating armature, Rotating field
Single phase, Three phase
|Permanent magnet, Separately-excited, Self-excited