The applications of lap winding mainly include low voltage as well as high current machines. These windings are mainly linked for providing numerous parallel lanes for armature current. Due to this reason, this type of winding is used in dc generators, and it requires some pairs of brushes and poles.

Why lap winding is used for high current?

Lap winding are used for low voltage and high current rating machines. ... Since emf generated in DC machine = (ØZPn / a) where P,n and 'a' are number of poles, speed in rps and number of parallel path. But in lap winding, number of parallel path 'a' = P; therefore, the emf generated in lap winding = ØZn.

What is triplex winding?

The multiplex (duplex or triplex) lap windings are used where heavy currents at low voltage are necessary. The duplex lap winding is obtained by placing two similar windings on the same armature and connecting the even-numbered commutator bars to one winding and the odd-numbered ones to the second winding.