Let P = Numbers
of poles
Ф = Flux / pole in weber
Z = Total numbers of armature conductors
A = Number of armature parallel path
N = Armature Speed in RPM
When a
conductor rotates one revolution, it cuts flux of PФ webers.
Time required
for one revolution = 60 / N second
Hence according
to Faraday's law of electromagnetic induction.
Induced emf / conductor
= Flux cuts by a conductor / Time for one revolution
= PF
/ 60N
= PFN
/ 60
Numbers of
series conductor in one path = Z / A
Induced emf ( E
) = PFN
/ 60 ( Z / A )
Where A = 2 Wave Winding
A = P Lap Winding
If angular velocity
ω in radian / second, the induced emf is
E = 1 / 2π (
2πN / 60 ) PF
( Z / A )
=
ωPF
/ 2π ( Z / A ) ( where ω = 2πN / 60 )
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