Question

Meaning of number of parallel paths in armature

Answer 1

The number of parallel paths in a DC machine depends on the type of armature winding used.There are two types of windings,namely:Lap Winding:
If connection is started from slot 1,then connections overlap each other as winding proceeds till starting point is reached again.
Due to such connection,the total number of conductors get divided into P number of parallel paths where,P=number of poles.
Large number of parallel paths indicate high current carrying capacity of machine,hence lap winding is preferred for high current rating generators.Wave Winding:
This type of winding always travel ahead avoiding overlapping it travels like a progressive wave hence,called wave winding.
Due tot his type of winding , the total number of conductors get divided into two parallel paths, irrespective of the number of poles.
As number of parallel paths are less, it is preferable for low current, high voltage generated
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Answer 2

Armature coils are connected in series in such a way that armaturewinding is divided into as many asparallel paths as the number of poles,i.e., In lap winding thenumber of parallel paths is equal to the number of poles ,i.e., A=P