Commutator in DC generator is used for:

Commutator in DC generator:

• The commutator in a DC generator converts the AC armature current into pulsating DC. 
• Therefore, the commutator acts as a rectifier in a DC generator.
• The commutator insures that the current from the generator always flows in one direction.
• The brushes in a DC machine are placed on the commutator in the polar axis.
• Brushes are used to collect the current due to the induced emf from the armature coils in a DC generator.
• Brushes are made up of Carbon and graphite to reduce the wear and tear of the commutator.