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A 4 pole generator with 16 coils has two layer lap winding. The pole pitch is ________.
1. 8
2. 32
3. 16
4. 4

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Correct Answer - Option 1 : 8

Pole pitch:

  • The pole pitch is defined as the peripheral distance between centers of two adjacent poles in dc machine.
  • This distance is measured in term of armature slots or armature conductor come between two adjacent pole centers.
  • This is naturally equal to the total number of armature slots divided by the number of poles in the machine.
  • A pole pitch in an electrical machine is equal to 180° electrical.

 

Calculation:

Given that,

Number of coils = 16

As the winding is two-layer winding

⇒ Total number of conductors = 2 × 16 = 32

Pole pitch = Number of conductors/number of poles = 32/4 = 8

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