Question

When are the double layer bar windings made use of during the armature design?

(a) large values of flux per pole and small number of turns per phase

(b) large values of flux per pole and large number of turns per phase

(c) small values of flux per pole and small number of turns per phase

(d) small values of flux per pole and large number of turns per phase

I had been asked this question during an interview for a job.

I'm obligated to ask this question of Armature Design in section Design of Synchronous Machines of Design of Electrical Machines

Answer 1

Correct choice is (a) large values of flux per pole and small number of turns per phase

Easy explanation: The double layer bar windings are made use of when there is large values of flux per poles. The double layer bar windings are made use of when there are small number of turns per phase.