Question

Why are damper windings used in the construction of hydro-generators?

(a) to control losses

(b) to increases efficiency

(c) to reduce the oscillations

(d) to reduces voltage surges

I got this question in a job interview.

My question is taken from Construction of Hydro-Generators topic in division Design of Synchronous Machines of Design of Electrical Machines

Answer 1

The correct answer is (c) to reduce the oscillations

For explanation: The damper windings are generally used in the construction of hydro-generators. It is generally used to reduce the oscillations in the generator.