Question

explain the construction and working of electric motor. in short answer...... ​

Answer 1

Answer:

Electric Motor Construction:

The electric motor construction can be done using the rotor, bearings, stator, air gap, windings, commutator, etc. The rotor in an electric motor is the moving part, and the main function of this is to rotate the shaft for generating the mechanical power.

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Answer 2

Explanation:

1 When the current begins to flow, current flows through brush X, then A to B, B to C, C to D and then to brush Y and into the battery.

2 Now applying Fleming's Left Hand Rule to wire AB, Current is along AB, Magnetic Field is as shown (North-> South), the motion of the wire is downwards.

3 Now applying Fleming's Left Hand Rule to wire CD, Current is along CD, Magnetic Field is as shown (North-> South), the motion of the wire is upwards.

4 The rectangular coil begins to move in the anti-clockwise direction

5 Note that during anti-clockwise motion, the split rings and axle also move, whereas the brushes don't move.

6 After half a rotation, Wire CD and Split ring Q moves to the left. Wire AB and Split ring P moves to right. Brushes X and Y donot move.

7 Now applying Fleming's Left Hand Rule to wire CD, Current is along DC. (Battery -> Split ring Q -> DC , Magnetic Field is as shown (North-> South), the motion of the wire is downwards.

8 Now applying Fleming's Left Hand Rule to wire AB, Current is along BA. (Battery -> Split ring Q -> DC --> CB -> BA --> Split ring P) , Magnetic Field is as shown (North-> South), the motion of the wire is upwards.

9 So, again the coil rotates in the anti-clockwise direction.

10 The reversal of current in the coil results in the continous rotation of the coil. The reversal of current is achieved by the commutator rings.

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