29/10/2025
Principle of "Electrical motor"...
"The current in the rotating coil is reversed every half-turn by an automatic switching arrangement consisting of a split metal ring called a commutator. The rotating part of the motor, known as the armature, comprises a coil with multiple turns of wire. The armature is mounted on an axis between two fixed magnetic poles. Each end of the armature is connected to one end of the commutator.
Current enters the commutator through one brush connected to a battery and leaves the armature through the second brush, which is in contact with the other half of the commutator. Since the brushes are fixed, each brush contacts one half of the commutator during one half-turn and the opposite half during the second half-turn. This arrangement ensures that the current in the armature reverses direction every half-turn, maintaining the conditions necessary for the armature to continue rotating."
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