Difference Between AC And DC Motor

-

 

Difference Between AC And DC Motor

The difference between AC and DC Motor are discussed below:

AC Motor vs DC Motor

AC Motor

DC Motor

AC motor runs on alternating current.

DC motors operate on direct current.

There is no need for conversion of current in AC motors. Like AC.

There is no need for conversion of current in AC motors. Like AC.

AC motors are used where power performance is demanded for extended periods of time.

DC motors are used where the speed of the motor needs to be controlled externally.

AC motors can be single-phase or three-phase.

All DC motors are single phase.

In an AC motor the armature does not rotate while the magnetic field keeps rotating continuously.

In a DC motor, the armature rotates while the magnetic field rotates.

Repairing AC motors is not expensive.

DC motors are very expensive to repair.

Brushes are not used in AC motor.

Brushes are used in DC motor.

AC motors have a very long life span

DC motors do not have a very long life span.

The speed of AC motors can be controlled by simply changing the frequency of the current.

The speed of DC motors can be controlled by changing the current of the armature winding

Comments

Post a Comment

Popular posts from this blog

Alternating Current

-
Image
  What Is Alternating Current? An  alternating current  can be defined as a current that changes its magnitude and polarity at regular intervals of time. It can also be defined as an electrical current that repeatedly changes or reverses its direction opposite to that of Direct Current or DC, which always flows in a single direction as shown below From the graph, we can see that the charged particles in AC tend to start moving from zero. It increases to a maximum and then decreases back to zero completing one positive cycle. The particles then reverse their direction and reach the maximum in the opposite direction after which AC again returns to the original value completing a negative cycle. The same cycle is repeated again and again. Alternating currents are also accompanied usually by alternating voltages. Besides, alternating current is also easily transformed from a higher voltage level to a lower voltage level.
Read more