Question 4.8: A four-pole dc generator has 1000 conductors. The flux per p...

Case I

P = 4, Z = 1000, Φ = 25 × 10^{−3}  Wb
A = 4, N = 1500 rpm

Induced EMF,                          E = \frac{ΦZNP}{60  A} = \frac{25  ×  10^{-3}  ×  1000  ×  1500  ×  4}{60  ×  4}

For wave winding,                    A = 2 = 625 V
E to be the same,

625 =\frac{ΦZNP}{60  A} = \frac{25  ×  10^{-3}  ×  1000  ×  N  ×  4}{60  ×  2}

or,                                              N = 750 rpm