tricallite

Commutation in DC Machine or Commutation in DC Generator or Motor The  voltage  generated in the armature, placed in a rotating  magnetic field , of a  DC generator  is alternating in nature. The  commutation in DC machine  or more specifically  commutation in DC generator  is the process in which generated alternating  current  in the  armature winding  of a dc machine is converted into direct current after going through the commutator and the stationary brushes. Again in  DC Motor , the input DC is to be converted in alternating form in armature and that is also done through commutation. This transformation of current from the rotating armature of a DC machine to the stationary brushes needs to maintain continuously moving contact between the commutator segments and the brushes. When the armature starts to rotate, then the coils situated under one pole (let it be N pole) rotates between a positive brush an...

The Voltage generated in the armature, placed in a rotating Magnetic Field, of a DC generator is alternating in nature. The commutation in DC machine or more specifically commutation in DC generator is the process in which generated alternating  current  in the  armature winding  of a dc machine is converted into direct current after going through the commutator and the stationary brushes. Again in  DC Motor , the input DC is to be converted in alternating form in armature and that is also done through commutation. This transformation of current from the rotating armature of a DC machine to the stationary brushes needs to maintain continuously moving contact between the commutator segments and the brushes. When the armature starts to rotate, then the coils situated under one pole (let it be N pole) rotates between a positive brush and its consecutive negative brush and the current flows through this coil is in a direction inward to the commutator segments. T...