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What is the formula for the pole pitch in the universal commutator motor?(a) pole pitch = 3.14 * diameter * 2 * no. of poles(b) pole pitch = 3.14 / diameter * 2 * no. of poles(c) pole pitch = 3.14 * diameter / 2 * no. of poles(d) pole pitch = 3.14 * diameter * 2 / no. of polesThe question was asked by my school teacher while I was bunking the class.This question is from Design of Small Universal Commutator Motors topic in chapter Design of Small Electrical Machines, Starters and Field Regulators of Design of Electrical Machines

Answer»

The correct OPTION is (c) pole pitch = 3.14 * diameter / 2 * no. of poles

For explanation I would SAY: The diameter and the NUMBER of poles are calculated. On SUBSTITUTION, the pole pitch of the universal commutator motor is obtained.



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