suchayandas

 Profile Answers by suchayandas Questions by suchayandas

• Aug 14th, 2008

 

1.Alternators are used in automobiles to charge the battery and to power all the car's electric systems when its engine is running. Alternators have the great advantage over direct-current generators of not using a commutator, which makes them simpler, lighter, and more rugged than a DC generator. The stronger construction of alternators allows them to turn at higher speed, allowing an automotive alternator to turn at twice engine speed, improving output when the engine is idling. The availability of low-cost solid-state diodes from about 1960 allowed auto manufacturers to substitute alternators for DC generators. Automotive alternators use a set of rectifiers (diode bridge) to convert AC to DC. To provide direct current with low ripple, automotive alternators have a three-phase winding.

2.Alternator puts out voltage when it needed. But,generator puts out voltage all the time.

3.Alternator produces Alternating Current.But,Generator produces Direct Current.

4.Alternator consist no commutator,and due to absense of commutator it's simpler than generator.

5.Alternator construction is more stronger than dc generator.

6.Alternator use only those energy which is needed.So,it save energy.Where Generator use all those energy which is supplied.There is no save of energy.So using alternator is more profitable than generator in the purposes.

Abhijit_atrangi

 Profile Answers by Abhijit_atrangi Questions by Abhijit_atrangi

• Aug 28th, 2008

 

Alternator and Generator have the same principle of electromagnetic induction but Generator has the stationary magnetic field and rotating conductor which rolled on the armature with slip rings and brushes ride against the slip rings which is convert the induced emf to the dc current for external load

In Alternator the armature is stationary and magnetic field is rotating but for low voltage output we have the rotating armature and stationary filed, for high voltage output we have to use the general design of the alternator

High voltage alternator has the rotating field because in rotating armature pattern requires the slip ring and brush to connect the induced emf to the external load but in high voltage it is impossible to isolate the slip ring and brush result in short ckt producing high voltage thats why high voltage alternators have the rotating magnetic field.

aliksan"

• Oct 3rd, 2011

 

alternator: motion to electrical energy conversion
diesel:fuel oil or gas convert to rotate
generator : gas to electrical
generator ( alternator+(diesel,turbine, etc.)

kundan malani

• Oct 19th, 2011

 

Alternator and Generator both are the same

bittu123

 Profile Answers by bittu123 Questions by bittu123

• Nov 10th, 2011

 

Generator: An electrical machine which is used to convert mechanical energy into electrical energy.

Alternator: A special type of generator which serve the purpose with synchronising speed. In simple language,
Synchronous generator = Alternator

You always heard Induction generator, dc generator, Have you ever heard Induction alternator or dc alternator.
alternator is used for synchronous generator

suprit

• Mar 27th, 2012

 

The same function is that only it gives voltage not more than that.

nimmala rakesh

• Mar 28th, 2012

 

Alternators and generators are the two devices which generates electricity.. the function of these are same but the construction of it is different. in alternators the armature is stationary and the magnetic field rotates.(i.e., the field magnets will spin inside the armature.. and whereas in generators the magnetic field is stationary and the armature winding will rotate. Hence the alternator can be termed as ac generator whereas generator can be termed as dc generator.. However both will convert mechanical energy into electrical energy..

satyaprakash sahu

• Apr 12th, 2015

 

As the main difference between alternator and generator is that field winding(poles) in a generator are present in stator i.e is fixed and armature winding is rotating whereas in a alternator the poles are present in rotor and the armature winding is present in stator and also commutator which converts the ac to dc is not present in the alternator as AC is required which is present in a generator