# Differences Between Lap Winding & Wave Winding

Let us discuss on Comparison Between Lap Winding and Wave Winding. All the major differences between lap winding & wave winding provided here.

### Differences Between Lap Winding And Wave Winding

Lap Winding Wave Winding
1. In this winding all the pole groups of the coils generating
e.m.f in the same direction at any instant of time are
connected in parallel by the brushes.
1. In this winding all the coils carrying current in the
same direction are connected in series i.e., coils
carrying current in one direction are connected in one
series circuit and coils carrying current in opposite
direction are connected in other series circuit.
2. Lap winding is also known as parallel windings. 2. Wave winding is also known as series winding.
3. The number of parallel path is equal to the number
of poles i.e., A = P.
3. The number of parallel paths is always equal to 2
i.e., A = 2.
4. The number of brush required by this windingis always
equal to the number of poles.
4. The number of brushes required by this winding
is always equal to 2.
5. The machine using lap winding requires equalizer rings
for obtaining better commutation.
5. The machine using wave winding does require dummy
coils to provide the mechanical balance for the armature.
6. Lap windings are used for low voltage and high current
machines.
6. Wave windings are used for high voltage and low
current machines.
7. Lap windings are generally used for machines of ratings
above 500 kW.
7. Wave windings are generally used for machines of
ratings below 560 kW