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Which of the following are used in preventing the hunting phenomenon in synchronous generators?

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Which of the following are used in preventing the hunting phenomenon in synchronous generators?

(a) Damper bars

(b) Short pitch chords

(c) Distributed winding

(d) Damper bars and short pitch chords

This question was addressed to me in class test.

This intriguing question comes from DC Motors topic in division Characteristics of DC & AC Motors of Electric Drives

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The correct option is (a) Damper bars

To explain: Damper bars try to maintain synchronism between the rotating magnetic field and the rotor so they help in preventing hunting. It produces surges in the machine.

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