- a device for reversing the direction of a current.
- (in a DC motor or generator) a cylindrical ring or disk assembly of conducting members, individually insulated in a supporting structure with an exposed surface for contact with current-collecting brushes and mounted on the armature shaft, for changing the frequency or direction of the current in the armature windings.
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Words nearby commutator
Example sentences from the Web for commutator
As armature, commutator, and shaft rotate, the brushes connect first with one segment of the commutator and then with the other.General Science|Bertha M. Clark
It is best to have these ends terminate on the commutator side of the frame.The Boy Mechanic, Book 2|Various
In this case each of the motor circuits is connected to two diametrically opposite bars of the commutator.The inventions, researches and writings of Nikola Tesla|Thomas Commerford Martin
In this figure the brushes are arranged to make contact with the outer surface of the ring C, which is the commutator.
The commutator part of the motor should be enclosed so that there may be no possibility of a spark igniting the film.Motion Picture Operation, Stage Electrics and Illusions|Henry C. Horstmann