Question

What is the formula for the mean pitch factor?

(a) mean pitch factor = pitch factor of each coil per pole group + turns in the coil / total number of turns

(b) mean pitch factor = pitch factor of each coil per pole group / turns in the coil * total number of turns

(c) mean pitch factor = pitch factor of each coil per pole group * turns in the coil * total number of turns

(d) mean pitch factor = pitch factor of each coil per pole group * turns in the coil / total number of turns

I got this question during an internship interview.

My doubt stems from Design of Stator in portion Design of Single Phase Induction Motor of Design of Electrical Machines

Answer 1

The correct choice is (d) mean pitch factor = pitch factor of each coil per pole group * turns in the coil / total number of turns

For explanation I would say: The pitch factor of each coil per pole group, turns in the coil and total number of turns are obtained. On substitution, it gives the mean pitch factor.