Answer Posted / ramesh behera

Silent pole rotor-

1)large in diameter small in axial length
2)where flux density are high so lows speed alternators are
used for generating electrical energy.
3)Arrangement of large pole such to max 64
4) so these type pole rotors are used in hydro-generator

Non-silent pole rotor-
1)small in diameter large in axial length
2)Flux density appx. low high speed alternator are used
generating electrical energy.
3)No pole field are less appx.=4
4)so these type pole rotors are used in turbo-generator

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