Question

For a wave winding when a machine is 6-pole DC armature with 16 slots having 2-coil sides per slot and single-turn coil, Yf value is ____

(a) 5

(b) 3

(c) 2

(d) 7

The question was posed to me in a job interview.

My question is based upon Wave Winding in chapter Armature Windings of DC Machines

Answer 1

Right option is (a) 5

For explanation: Ycs = 16/6 = 2 slots (nearest lower integral value)

Yb= 2*2+1 = 5

Yc= 2(16-1)/6 = 5 segments

Yf = 2Yc – Yb = 5.