Explanation:

A commutator is a device that is used to change the direction of current in the coil of a DC motor. It is a specially designed electrical switch that is used to reverse the direction of the current flow in the coil every half rotation of the motor. This change in direction of current flow causes the motor to rotate continuously in one direction.

How does a commutator work?

A commutator is made up of a set of copper segments that are mounted on the armature shaft of a DC motor. These segments are separated from each other by insulating material. The ends of the coil are connected to these copper segments.

When the motor is turned on, the current flows through the coil, and the armature starts to rotate. As the armature rotates, the commutator segments come into contact with the brushes, which connect the armature to the external circuit. As the commutator segments pass under the brushes, the current direction in the coil is reversed. This reversal of current direction causes the armature to continue rotating in one direction.

Applications of commutator:

The commutator is an essential component of the DC motor, and it is used in various applications such as:

1. Electric vehicles: The commutator is used in electric vehicles to convert the DC power stored in batteries into mechanical energy.

2. Power tools: The commutator is used in power tools such as drills, saws, and grinders to convert the electrical energy into mechanical energy.

3. Robotics: The commutator is used in the motors used in robotics to provide precise control and movement.

Conclusion:

In short, the commutator is a crucial component of a DC motor that is used to change the direction of current flow in the coil. It is widely used in various applications such as electric vehicles, power tools, and robotics.