Question

Explain the function of commutater
in a D.C. motor. in what respects in the commutation process in D.C. motors different from that in generator​

Answer 1

The commutator on the DC generator converts the AC into pulsating DC. ... On DC and most AC motors the purpose of the commutator is to insure that the current flowing through the rotor windings is always in the same direction, and the proper coil on the rotor is energized in respect to the field coils.

Answer 2

Commutator in a Electric Motor

1. In an Electric Motor, Electrical Energy is converted into Mechanical Energy.
2. Commutator Reverses the Direction of Flow of Current to the Coil every half turn so that a steady rotating force is produced.
3. The coil that is kept in powerful Magnetic Field experiences force that is calculated through Fleming's Left Hand Rule.

Commutator in a Generator

1. In a Generator, Mechanical Energy is converted into Electrical Energy.
2. Commutator assures that the current produced in the Generator always flows in one Direction, so that pulsating D.C Direct Current is produced.
3. Brushes are kept on the Commutator so that an angle is formed between the coil and the Magnet.