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Coil span for 4-pole, 12-slot armature winding is_______(a) 24(b) 48(c) 8(d) 3I have been asked this question in an internship interview.Asked question is from Armature Winding and Commutator topic in chapter Armature Windings of DC Machines

Answer»

The correct ANSWER is (d) 3

The best explanation: Coil SPAN is DEFINED as a ratio of number of slots in the armature winding which are also equal to the number of COMMUTATOR segments to the number of poles. Here, Slots in the armature winding= 12, Number of poles= 4.

YCS= 12/4= 3.



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