Between d.c generators and a.c generators

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In summary, the main difference between DC and AC generators is the presence of a commutator, which converts AC to DC in DC generators. The field placement and voltage generation also differ between the two types. DC generators require full retrace and have limited transfer distance, while AC generators have sinusoidal voltage and can be transferred over longer distances. AC is more cost-efficient for transfer, while DC is more efficient for actual production and can be stored.
  • #1
neduet
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Hi friends

Between d.c generators and a.c generators only difference is commutator which rectified a.c to d.c. or any thing other.
What need of d.c generator? Because I never see anywhere d.c generator

thanks a lot
 
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  • #2


Well, for one, the field on a dc generator is usually on the stator, while in a ac generator, the field usually in the rotor. Also, the voltage generated "behind" the commutator is not sinusoidal, unlike on the voltage generated on a ac machine.
 
  • #3


work of commutator and brushes rectified or conducting only so it is not in a.c generated right?
voltage generated "behind" the commutator is not sinusoidal ?
 
  • #4


DC generators require full retrace. The positive must flow all the way to the work and back to the generator or battery to cpmplete the circuit causing heat and severe loss. DC requires large conductors and can only be kept at short disyances.

AC is sinusodal, or alternates between high and low. Allowing unlimited transfer length because the electrons never have to return to the source.

By the two methods, ac provides cost efficiency for transfer, dc for cost efficiency in actual production.

AC is just cheaper to move. Furthermore, AC can never be stored. Whereas, DC can be stored.
 

1. What is the main difference between d.c generators and a.c generators?

D.C generators produce a direct current (d.c) output, meaning the flow of electricity is in one direction. A.C generators produce an alternating current (a.c) output, meaning the flow of electricity constantly changes direction.

2. Which type of generator is more commonly used?

A.C generators are more commonly used because they have several advantages over d.c generators, such as easier and more efficient transmission of electricity over long distances.

3. How do d.c generators and a.c generators work?

D.C generators use a commutator and brushes to convert mechanical energy into d.c electricity. A.C generators use slip rings and brushes to convert mechanical energy into a.c electricity.

4. Can a d.c generator be converted into an a.c generator?

Yes, a d.c generator can be converted into an a.c generator by replacing the commutator and brushes with slip rings and brushes.

5. What are some common applications of d.c generators and a.c generators?

D.C generators are commonly used in applications such as battery charging, welding, and electric cars. A.C generators are used in power plants, electric motors, and most household appliances.

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