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The generated e.m.f from 70-pole armature having 100 conductors driven at 10 rev/sec having flux per pole as 20 mWb, with wave winding is ___________

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The generated e.m.f from 70-pole armature having 100 conductors driven at 10 rev/sec having flux per pole as 20 mWb, with wave winding is ___________

(a) 730 V

(b) 740 V

(c) 700 V

(d) 690 V

This question was addressed to me in semester exam.

My enquiry is from Dynamics in section Dynamics of Electrical Drives of Electric Drives

1 Answer

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The correct answer is (c) 700 V

Explanation: The generated e.m.f can be calculated using the formula Eb = Φ×Z×N×P÷60×A, Φ represent flux per pole, Z represents the total number of conductors, P represents the number of poles, A represents the number of parallel paths, N represents speed in rpm. In wave winding number of parallel paths are 2. Eb = .02×70×100×600÷60×2 = 700 V.

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