Why is the direction of current in an motor reversed after every half round
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The two parts of a split ring in motor act as commutator to reverse the direction of current in the coil. Thus, whenever the coil comes in vertical position, the direction of current through the coil reverses and the coil continues to rotate in the same direction.Commutators are simple mechanical switches that "turn" a circuit element around. If pole A was connected to to net .A net and pole B was connected to netB , then the commutator connects A to net B and B to net A. This can be done synchronously to the rotation of an electrical machine, which turns the AC voltage generated by the coils of that machine into a pulsating DC voltage.
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The two parts of a split ring in motor act as commutator to reverse the direction of current in the coil. Thus, whenever the coil comes in vertical position, the direction of current through the coil reverses and the coil continues to rotate in the same direction.Commutators are simple mechanical switches that "turn" a circuit element around. If pole A was connected to to net .A net and pole B was connected to netB , then the commutator connects A to net B and B to net A. This can be done synchronously to the rotation of an electrical machine, which turns the AC voltage generated by the coils of that machine into a pulsating DC voltage.
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