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Electrical Applications 2 by David W. Tyler

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84 DC machines
χ*~^\
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Figure 6.12
number
1
and its two sides are labelled
1
and
1
' respectively. Its
two
Figure 6.13
Figure 6.14
This should be compared with that shown in
Figure
6.10 which
was for a different coil and field configuration.
There are two disadvantages to the ring winding. These are:
1 The right winding is difficult to wind since each turn must be
taken round the core by hand.
2 Only a small part of the winding is active at any one time.
Other windings have been developed to overcome these problems.
THE LAP WINDING
Commutator
Figure 6.15