Page 158 - Electrician - TT (Volume 2)
P. 158
ELECTRICIAN - CITS
No. of conductors/slot = 12/6 = 2 conductors/slots.
Hence the winding is double layer winding.
Z
Back pitch Y B 1 12/2 1 6 1 7
P
Front pitch Y = Y 2 x Plex = 7 2 = 5
B
F
Y = 7 and Y = 5 for progressive winding
F
B
Y = 5 and Y = 7 for retrogressive winding
B F
The winding sequence of conductors for progressive lap winding is shown in Fig 1.
Fig 1
Winding Table
Coil Conductor Slot Commutator
segments
From To From To From To
1 1 8 1 4 I II
2 3 10 2 5 II III
3 5 12 3 6 III IV
4 7 2 4 1 IV V
5 9 4 5 2 V VI
6 11 6 6 3 VI I
Development winding diagram for 12 conductors, 2 poles, 6 slots, 6 segments, simplex double
layer lap winding
Fig 2 shows the arrangement of coils in the respective slots and the connection of the coils with the segments.
Development diagram with conductors : Fig 3 shows the arrangement of armature conductors in the slots and
connections to commutator segments.
Fig 2 Fig 3
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CITS : Power - Electrician & Wireman - Lesson 86-92
