Value of commutator pitch in lap winding is_____(a) +2(b) +1 or -1(c) -2(d) Different for different parametersI got this question during an online interview.This intriguing question comes from Lap Winding topic in chapter Armature Windings of DC Machines

Value of commutator pitch in lap winding is_____(a) +2(b) +1 or -1(c)

1.	Value of commutator pitch in lap winding is_____(a) +2(b) +1 or -1(c) -2(d) Different for different parametersI got this question during an online interview.This intriguing question comes from Lap Winding topic in chapter Armature Windings of DC Machines
Answer» The correct choice is (b) +1 or -1 Explanation: Two ends of coil are connected ACROSS the adjacent commutator segments. Depending on the type of winding that is, RETROGRESSIVE or PROGRESSIVE, we have two values for commutator pitch. For progressive winding, commutator pitch = +1. For retrogressive winding, commutator pitch = -1.

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