The oscillations in a synchronous motor can be damped out by_______________?
Correct answer: C. providing damper bars in the rotor pole faces
- A. maintaining constant excitation
- B. running the motor on leading power factors
- C. providing damper bars in the rotor pole faces
- D. oscillations cannot be damped
Explanation
Damper bars in the rotor pole faces develop damping torque when the rotor oscillates relative to the rotating field. They suppress hunting and also assist in starting the motor.
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