When the rotor speed, in a synchronous machine, becomes more than the synchronous speed during hunting, the damper bars develop
A)inductor motor torque
B)induction generator torque
C)synchronous motor torque
D)d.c. motor toque

Question

Quizplus · Accepted Answer

During hunting, when the rotor speed of a synchronous machine exceeds the synchronous speed, the damper bars develop induction generator torque. This is because the relative motion between the rotating magnetic field and the rotor causes the damper bars to act like the rotor bars in an induction generator, thus generating torque that opposes the motion.

When the Rotor Speed, in a Synchronous Machine, Becomes More