When the rotor speed, in a synchronous machine, becomes more than the synchronous speed during hunting, the damper bars develop_________________?
Correct answer: B. induction generator torque
- A. inductor motor torque
- B. induction generator torque
- C. synchronous motor torque
- D. d.c. motor toque
- E. none of the aboveElectromechanical Devices
Explanation
When the rotor moves faster than synchronous speed, the damper bars experience negative slip and produce a braking torque opposing the overspeed. This is the torque characteristic of induction-generator action.
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