Question

In the split ring commutator of a DC motor, semicircular rings are used. What is the need of this?

Answer 1

Hint:The DC motors are widely used motors that have the main principle of the DC motor is to convert the electrical energy into mechanical energy. The DC motor is provided with some devices or the parts to periodically change the direction of the current in the motor.

Complete step by step answer:
The important part of the DC motor is the split ring commutator. The main work of the commutator is to maintain the direction of the flow of the current through the windings of the armature. Thus the commutator reverse the direction of the current for every half turn of the split rings are used as the commutator in the DC motor and it rotates in the same
way as that of the armature rotation.

The split rings are made up of the copper and the spindle connected to it is made of carbon. When the motor rotates, one piece of the copper connects with the other pieces of copper, so that the current flows in half turn. At this time, the other copper pieces are left unconnected at the centre and look like they are split down the middle, so it is called a split ring commutator.

Note:Remember that the split rings reverse the current for every half turns, so it must be made up of the conductor for the passage of the current through the armature. SO the copper is used for this purpose. This DC motor is used to convert either AC to DC voltage or the DC to AC voltage.