Generator Operator Interview Question:

Do you know what is commutation?

Submitted by: Muhammad

The currents in the coils connected to a brush are either all towards the brush (positive brush) or all directed away from the brush (negative brush). Therefore, current in a coil will reverse as the coil passes a brush. The reversal of current in a coil as the coil passes the brush axis is called commutation.
Submitted by: Muhammad