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SEE 3433 Elements of Armature Winding in DC Machines.

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Presentation on theme: "SEE 3433 Elements of Armature Winding in DC Machines."— Presentation transcript:

1 SEE 3433 Elements of Armature Winding in DC Machines

2 Elements of an armature windings A turn – two conductors connected to an end by an end connector

3 Elements of an armature windings A coil – several turns connected in series

4 Elements of an armature windings A winding – several coils connected in series

5 Elements of an armature windings The angle between centers of adjacent poles is 180 o (electrical) N N SS 360 o electrical = 180 o mech 180 o electrical = 90 o mech

6 Elements of an armature windings The angle between centers of adjacent poles is 180 o (electrical) N N SS If coil sides are placed 180 o electrical apart, the coil is said to be full-pitch a b 180 o elec ab

7 Elements of an armature windings The most common ways of connecting coils for armature windings: Lap winding Wave winding Ends of the coils are connected to the commutator bars In DC machines most of the coils are full-pitch.

8 Elements of an armature windings Commutator bar Lap winding One coil between adjacent commutator bars 1/p of total coils are connected in series No. of poles no. of brushes no. of parallel paths

9 Elements of an armature windings

10 Wave winding p/2 coils in series between adjacent commutator bars ½ of all coils between brushes Regardless of no. of poles, there are always 2 parallel path The distance between end coils (commutator pitch) is 2(C 1)/p where C is the no. of commutator bars

11 Elements of an armature windings


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