Page 616 - Basic Electrical Engineering

voltage and current requirements, the number of parallel paths could be
different, say 2, 4, 6, etc.

7.2.4 Types of Armature Winding

All the coils placed in armature slots are connected together in a particular
manner to form the armature winding. Two basic types of winding

connections are made. They are (i) lap winding and (ii) wave winding. In all
cases, the coil ends are connected to commutator segments. The commutator
segments are, in fact, extension of coil end connections. Brushes placed on

commutator touching the commutator segments make sliping contact with the
coils. The two types of armature windings are explained below.

Figure 7.8 Series–parallel connection of armature coils to form the armature winding: (a) series
connection of all the armature coils; (b) series–parallel connection of the coils

(a) Lap winding