Question

Turbo generators do not use damper winding due to ___________

(a) solid steel rotor core

(b) laminated armature

(c) soft iron core

(d) small current flow in pole shoes

This question was addressed to me in a job interview.

This is a very interesting question from Hunting and Damper Windings in division Synchronous Machine Stability of Electrical Machines

Answer 1

Right answer is (a) solid steel rotor core

To explain: Because eddy current in the q-axis produce the same effect as the damper in salient pole machine.