For two-phase AC servomotor, if the rotor’s resistance and reactance are respectively R and X, its length and diameter are respectively L and D then,

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Q. For two-phase AC servomotor, if the rotor’s resistance and reactance are respectively R and X, its length and diameter are respectively L and D then,

(A) x/r and l/d are both small

(B) x/r is large but l/d is small

(D) x/r and l/d are both large

Correct : Option (C)

Explanation:

 small x/r gives linear speed torque characteristic. large l/d gives less inertia and good acceleration characteristic.

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Q. For two-phase AC servomotor, if the rotor’s resistance and reactance are respectively R and X, its length and diameter are respectively L and D then,

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