The pitch factor is defined as the ratio of the e.m.fs. of the :

full-pitch winding to short-pitch winding

short-pitch coil to full-pitch coil

full-pitch winding to concentrated winding

distributed winding to full-pitch winding

2

4

6

8

reduce current fluctuations

reduce voltage fluctuations

increase stability

increase output e.m.f.

2160

1080

720

360

pulse shaped wave

square wave

sine wave

triangular wave