Question

Why cylindrical rotor alternator has largecore length and small diameter?

Answer 1

Answer:

At higher speeds, rotor diameter has to be decreased to keep centrifugal forces in check in cylindrical rotor machine and vice-versa for salient-pole machine. Hence A has to be kept constant. where rotor radius and axial length. Thus cylindrical rotor will have a longer axial length in contrast to salient-pole rotor.

Explanation:

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Answer 2

Answer:

At higher speeds, rotor diameter has to be decreased to keep centrifugal forces in check in cylindrical rotor machine and vice-versa for salient-pole machine. Hence A has to be kept constant. where rotor radius and axial length. Thus cylindrical rotor will have a longer axial length in contrast to salient-pole rotor.