0 a device used in some types of electric motors to change the direction in which an electric current is flowing
Brushes sparking badly on commutator of dynamo—due to poor contact.
Q. Why should sandpaper be used to smooth commutator instead of emery cloth?
The first dynamos were constructed with two commutator bars.
There are fifteen sections in the commutator, and each coupling is connected to a section.
These vibrations are adjusted to a very narrow range, but are sufficient to close the contacts of a commutator which reverses the current at each semi-vibration of the pendulum.
Taken together, throwing away terms of high enough grade and the removal of terms with even l after summation removes a high proportion of commutators.
It reduces the free invariants into products of d-triangles and commutator words.
Each hole connected by nylon hydraulic tubing to a ' fluid commutator ', a manifold containing a rotatable, ported centre-body.