84 DC machines
and its two sides are labelled
' respectively. Its
This should be compared with that shown in
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