Split ring commutator: It is the rotating interface of the armature coil with a stationary circuit where the split ring reverses the current at a given point to maintain the shaft torque in a magnetic field.

What is a split ring commutator GCSE?

a split ring commutator changes the current direction every half turn.

What device use a split ring commutator?

In dc machines split ring commutators are used to connect the rotational circuit with the static circuit. The slip rings also do the same. However, a slip ring does not convert the ac to dc or dc to ac but the split ring does.