noun

commutation

The switching of current direction in an electrical machine.

Commutation reverses the current in the motor's coils as it turns.

Etymology

The Latin verb means to change or exchange. Electrical commutation applies that switching idea to the connections or current direction within a machine.

More examples

Proper commutation helps the motor run smoothly.
Worn brushes can interfere with commutation in a DC motor.
This brushless motor uses electronic commutation instead of mechanical contacts.

Forms

commutation · commutations

commutator noun — Device that reverses current in a machine.

Similar words

reversal: Reversal describes any change to the opposite direction.
switching: Switching can change electrical connections without reversing current direction.