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A 3−ϕ, 16 pole alternator has a star-connected winding with 144 slots and 10 conductors per slot. The flux per pole is 0.03 Wb and is sinusoidally distributed. If the speed is 375 rpm then the value of the line emf generated will be

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Z = number of conductors in series per phase = 144 x 10 / 3 = 480

Eline = √3 x 4.44 f Nphϕm kd

= √3 x 4.44 x 0.96 x 0.03 x 480/2 x 50

= 2657.76V

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