What is a split-ring commutator in a dc motor? Explain the function of the same.

Definition

The split ring in an electric motor is however characterized as a commutator because it is made up of a simple ring as well as the cylindrical shell that would be divided axially with the sections isolated from each other.

Split-ring commutator function in dc motor

1. The split ring's role is to reverse the current at around that point. When a dc motor shafts contacts a split ring, the split ring alternates the current to keep the torque of the shaft constant throughout a magnetic field.
2. The split ring's objective would be to reverse the flow of current after every half revolution of the coil, causing the coil continuously revolve in a single direction.

Therefore, the split ring commutator's function would be to reverse the current every 180 degrees.