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Hunting of a synchronous motor is suppressed by

  • A.its damper winding
  • B.raising its excitation to the maximum available
  • C.reducing the inertia of the coupled load
  • D.increasing the resistance of its field circuit

Answer: A

Any relative motion between rotor and field induces currents in the bars whose torque opposes the swing, which damps the oscillation out. A flywheel of suitable inertia is sometimes added to shift the natural frequency away from the disturbing one.

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