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For a progressive wave winding Yc = ______(a) 2C/P(b) 2(C+1)/P(c) 2(C-1)/P(d) 2C/(P+1)I got this question in an interview for internship.My question is from Wave Winding topic in chapter Armature Windings of DC Machines

Answer» CORRECT choice is (b) 2(C+1)/P

Easy EXPLANATION: Starting at segment 1 and after going through P/2 coils or Yc (P/2) SEGMENTS, the winding should end in segment 2 for PROGRESSIVE winding or segment (C) for retrogressive winding. That is mathematically,

Yc (P/2) = (C+1)

 Yc = 2(C+1)/P


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