In wave winding, P/2 coils are connected under the influence of “x” pole-pairs which connect adjacent segments. X is ____(a) P(b) P/2(c) 2P(d) P/4This question was addressed to me during a job interview.The query is from Commutation Process topic in portion Commutation Process & Excitation Methods of DC Machines

In wave winding, P/2 coils are connected under the influence of “x�

1.	In wave winding, P/2 coils are connected under the influence of “x” pole-pairs which connect adjacent segments. X is ____(a) P(b) P/2(c) 2P(d) P/4This question was addressed to me during a job interview.The query is from Commutation Process topic in portion Commutation Process & Excitation Methods of DC Machines
Answer» The CORRECT answer is (b) P/2 Easy explanation: One coil each under an adjoining pole-pair is CONNECTED between adjacent commutator SEGMENTS in a lap wound DC armature, while in a wave-wound armature the only DIFFERENCE is that P/2 coils under the influence of P/2 pole-pairs are connected between adjacent segments.

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