What is commutation? How can a commutator convert ac voltages on a machines’ armature to dc voltages at its terminals?
Commutation: Commutation is the process a coil undergoes after leaving the magnitude field of one pair of poles and just before entering the magnetic field of the next pair poles. Converting ac voltages on a machines’ armature to dc voltages by commutator : This function is performed by a commutator. The ends of the coil are connected through the commutator to the brushes which lead to the external circuit. An explanation of fig 1 will clarify this process while the coil moves from position 1 to position 2 the brushes remain in contact with the commutator segment and the c...