What is a Silent Pole Generator?

Probably a salient pole generator!

Now you can google it.
Look for something sticking out!

Salient pole type

Probably, you read it wrong. It should be a "Salient Pole Generator". It is a generator in which the poles of the field in the rotor project out.

We are familiar with salient pole design and cylindrical design for motors and generators.Silent pole generators are not known.Please refer back and reply.