Answer / elango k

self exicted generator is called brusless generator.
in this generator the rotor houses the field , where field
gets supply from small generator or permanent magnet
generator fixed in the rotor itself .when the rotor rotates
emf is build to exicte the field of main genrator. the
supply from the small generator is ac which is converted to
dc by diodes which is fixed in rotor this diodes is called
rotating diodes.
so there is no need for brushes to supply current or
collect current from field or armature.
so it is called self exicted brushless alternator

Answer / raghavendran.r

We can have a separately excited Generator as a Brushless excitation system also.For Ex we have static excitation system which do not have brushes.

Excitation can also be provided by using pilot and main exciter and incorporating a rotating rectifier and feeding a DC excitation to the Generator.

Answer / vidya

ac generators are called brushless

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