why is the direction of the current in an electric motor reversed after every half round
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The two parts of a split ring in a d.c. 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.
sultan16:
nic answer
Answered by
1
Hi friend,
The direction of the current changes every half round because of its alternating nature.
As the current has a sinosoidal wave forms ,the phase difference changes for every half rotation with respect to the direction.
When it is parallel the end is maximum and when it is perpendicular the emf becomes zero.
The maximum emf is
e=- NBA (omega).
Hope you got a little idea.
The direction of the current changes every half round because of its alternating nature.
As the current has a sinosoidal wave forms ,the phase difference changes for every half rotation with respect to the direction.
When it is parallel the end is maximum and when it is perpendicular the emf becomes zero.
The maximum emf is
e=- NBA (omega).
Hope you got a little idea.
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