(a) A $350 \mathrm{Kw}, 500 \mathrm{~V}$ dc generator has 8 poles, an armature diameter of 1.3 m and a core length of 0.35 m . A duplex wave winding is accommodated in 114 slots with 6 coil sides per slot. The axial length of commutating poles is 10 mm . Find the necessary mmf for each inter pole if the specific permeance is $6 \times 10^{-6}$. Find also the number of turns.
Explanation
The necessary mmf for each inter-pole and the number of turns are calculated using the given formulas and data for a 350 kW, 500 V dc generator.
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