Question 4.3: 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.
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P = 6, A = P = 6 (because the armature winding is lap connected)
Φ = 0.05 Wb; E = 220 V
Z = 650, N = ?
E= \frac{ΦZNP}{60A}
Substituting values
220 = \frac{0.05 × 650 × N × 6}{60 × 6}
or, N= \frac{220 × 60}{ 650 × 0.05} = 406 rpm
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