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Assertion (A): Servomotors have heavier rotors and lower R/X ratio as compared to ordinary motors of similar ratings.Reason (R): Servomotor should have smaller electrical and mechanical time constants for faster response.Reason (R): Servomotor should have smaller electrical and mechanical time constants for faster response.(a) Both A and R are true and R is the correct explanation of A(b) Both A and R are true but R is not correct explanation of A(c) A is true but R is false(d) A is false but R is trueThe question was asked in examination.My question is from Differential Equations of Physical Systems and Dynamics of Robotic Mechanisms topic in portion Mathematical Models of Physical Systems of Control Systems |
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Answer» RIGHT option is (d) A is FALSE but R is true To explain: AC servomotors are essentially induction motor with low X/R RATIO for the ROTOR which has very low inertia. |
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