Universal Motor Commutator For Power Tools

Universal Motor Commutator For Power Tools

A collector commutator is a moving part of a rotary electrical switch in electric motors and electrical generators that periodically reverses the current direction between the rotor and the external circuit. It consists of a cylinder composed of multiple metal contact segments on the rotating armature of the machine. The commutator is one component of a motor; there are also two or more stationary electrical contacts called "brushes" made of a soft conductor like carbon that press against the commutator, making sliding contact with successive segments of the commutator as it rotates.

Collector Commutator Application

Collector Commutators are used in DC motors, generators and  universal motors. In a motor the commutator applies electric current to the windings. By reversing the current direction in the rotating windings each half turn, a steady rotating force (torque) is produced. In a generator the commutator picks off the current generated in the windings, reversing the direction of the current with each half turn, serving as a mechanical rectifier to convert the alternating current from the windings to unidirectional direct current in the external load circuit.

Collector Commutator Parameters

Collector Commutator Picture