Question

In a synchronous machine, hunting is predominantly damped by __________

(a) mechanical losses in the rotor

(b) iron losses in rotor

(c) copper losses of stator

(d) copper losses of rotor

The question was posed to me in unit test.

I need to ask this question from Power Angle Characteristics of Synchronous Machines in division Synchronous Machines of Electrical Machines

Answer 1

Correct answer is (d) copper losses of rotor

To explain I would say: The hunting is damped by the copper losses in the rotor.