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When coil sides are pole pitch apart, the DC armature winding is called as ___________

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When coil sides are pole pitch apart, the DC armature winding is called as ___________

(a) Multiplex

(b) Fractional-pitch

(c) Full-pitch

(d) Pole-pitch

This question was addressed to me in an internship interview.

The origin of the question is Armature Winding and Commutator in division Armature Windings of DC Machines

1 Answer

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Best answer
Correct choice is (c) Full-pitch

To explain: Pole pitch is called as center to center distance between two adjacent poles. When measured in electrical degrees one pole itch is equal to 1800. Coil span is simply a peripheral distance between two sides of a coil. If the coil span is equal to the pole pitch, then the armature winding is said to be full pitched coil.

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