write the Working of Electric Motor, A.C. Generator and D.C. Generator?
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AC Generators:
These are also called as alternators. It is the most important means of producing electrical power in many of the places since now days all the consumers are using AC. It works based on principle of the electromagnetic induction. These are of two types one is induction generator and other one is synchronous generator. The induction generator requires no separate DC excitation, regulator controls, frequency control or governor. This concept takes place when conductor coils turn in a magnetic field actuating a current and a voltage. The generators should run at a consistent speed to convey a stable AC voltage, even no load is accessible
Advantages of AC Generator:
These Generators are generally maintenance free, because of absence of brushes.
Easily step up and step down through transformers.
Transmission link size might be thinner because of step up feature
Size of the generator relatively smaller than DC machine
Losses are relatively less than DC machine
These Generator breakers are relatively smaller than DC breakers
DC Generators:
DC generator is typically found in off-grid applications. These generators give a seamless power supply directly into electric storage devices and DC power grids without novel equipment. The stored power is carries to loads through dc-ac converters. The DC generators could be controlled back to an unmoving speed as batteries tend to be stimulating to recover considerably more fuel.
Advantages of DC Generator:
Mainly DC machines have the wide variety of operating characteristics which can be obtained by selection of the method of excitation of the field windings.
The output voltage can be smoothed by regularly arranging the coils around the armature .This leads to less fluctations which is desirable for some steady state applications.
No shielding need for radiation so cable cost will be less as compared to AC.
HOPES THIS HELPS.....
These are also called as alternators. It is the most important means of producing electrical power in many of the places since now days all the consumers are using AC. It works based on principle of the electromagnetic induction. These are of two types one is induction generator and other one is synchronous generator. The induction generator requires no separate DC excitation, regulator controls, frequency control or governor. This concept takes place when conductor coils turn in a magnetic field actuating a current and a voltage. The generators should run at a consistent speed to convey a stable AC voltage, even no load is accessible
Advantages of AC Generator:
These Generators are generally maintenance free, because of absence of brushes.
Easily step up and step down through transformers.
Transmission link size might be thinner because of step up feature
Size of the generator relatively smaller than DC machine
Losses are relatively less than DC machine
These Generator breakers are relatively smaller than DC breakers
DC Generators:
DC generator is typically found in off-grid applications. These generators give a seamless power supply directly into electric storage devices and DC power grids without novel equipment. The stored power is carries to loads through dc-ac converters. The DC generators could be controlled back to an unmoving speed as batteries tend to be stimulating to recover considerably more fuel.
Advantages of DC Generator:
Mainly DC machines have the wide variety of operating characteristics which can be obtained by selection of the method of excitation of the field windings.
The output voltage can be smoothed by regularly arranging the coils around the armature .This leads to less fluctations which is desirable for some steady state applications.
No shielding need for radiation so cable cost will be less as compared to AC.
HOPES THIS HELPS.....
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