Question 7.3: A six-pole, lap-connected dc generator has a total of 650 co...
A six-pole, lap-connected dc generator has a total of 650 conductors. The flux per pole is 0⋅05 Wb. Calculate the speed at which the armature is to be driven to generate an EMF of 220 V.
P = 6, A = P = 6 (because the armature winding is lap connected)
Φ = 0.05 Wb; E = 220 V
Z = 650, N = ?
E =\frac{\phi ZNP}{60 A}Substituting values
220 =\frac{0.05 \times 650 \times N \times 6}{60 \times 6}or, N =\frac{220 \times 60}{650 \times 0.05}=406 rpm
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