Question

please state the functions of:-

carbon brushes
armature

Answer 1

A brush or carbon brush is a device which conducts current between stationary wiresand moving parts, most commonly in a rotating shaft. Typical applications include electric motors, alternators and electric generators.

Answer 2

Carbon brushes are used in DC machines to prevent sparking due to short circuiting of the armature coils. In induction motor brushes are used to conduct current from stator winding to rotor winding. They have high resistivity and brushes are also used to collect the current by avoiding sparking.