What is the symmetry requirement of lap winding?(a) 2C/P= 0(b) 2C/P= integer(c) 2C/P= non-integer(d) Can’t express mathematicallyI got this question in my homework.I would like to ask this question from Lap Winding in division Armature Windings of DC Machines

What is the symmetry requirement of lap winding?(a) 2C/P= 0(b) 2C/P= i

1.	What is the symmetry requirement of lap winding?(a) 2C/P= 0(b) 2C/P= integer(c) 2C/P= non-integer(d) Can’t express mathematicallyI got this question in my homework.I would like to ask this question from Lap Winding in division Armature Windings of DC Machines
Answer» RIGHT answer is (b) 2C/P= integer The best explanation: To avoid no-load CIRCULATING CURRENTS and certain consequential commutation problems, all the parallel paths must be identical so as to have the same number of coil-sides. Symmetry THUS requires ratio of 2C/P is equal to the integer. Also, US/P equal to integer REPRESENTS the same.

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