Advantages and disadvantages of short-pitched winding

The advantages are

  1. They save copper for end connections
  2. They improve the waveform of the generated EMF.
  3. The generated EMF can be made to approximate to a sine wave more easily and the distorting harmonics can be reduced.

The disadvantages are

  1. The total voltage around the coils is some what reduced. Because the voltage induced in the two coil sides are slightly out of phase.