What is Wave Winding?
In this winding, the end of one coil is connected to the starting of another coil of the same polarity as that of the first coil. In this type of winding the coil side(A-B) progresses forward around the armature to another coil side and goes on successively passing through N and S poles till it returns to a conductor(C-D)lying under the starting pole. This winding forms a wave with its coil, that’s why it is named wave winding. It is also called series winding because its coils are connected in series.
This winding is of two types:
- Progressive wave winding
- Retrogressive wave winding
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| Wave Winding |
Merits:
- In this winding, only two brushes are required but more parallel brushes can be added to make it equal to the no. of poles. If one or more brushes set poor contact with the commutator, satisfactory operation is still possible.
- This winding gives sparkless commutation. The reason behind that it has two parallel paths irrespective of the number of poles of the machine. The conductors in each of the two parallel paths are distributed around the armature in the entire circumference.
Demerits:
- This winding cannot be used in machines having higher current ratings because it has only two parallel paths.