An asynchronous AC motor with three-phase Y-connected 460V, 800-rpm, 60-Hz, 8-pole, has parameters: Rs=0.5 2, R=0.3...

  

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An asynchronous AC motor with three-phase Y-connected 460V, 800-rpm, 60-Hz, 8-pole, has parameters: Rs=0.5 2, R=0.3 , Xs = 0.8 2, X = 1.2 2, and Xm = 20 Q respectively. Apply the approximate equivalent circuit to determine (a) (i) input impedance; and (9 marks) (ii) input power. (8 marks) (b) Formulate test procedures' criteria to evaluate the performance of an overhauled aircraft alternator. An asynchronous AC motor with three-phase Y-connected 460V, 800-rpm, 60-Hz, 8-pole, has parameters: Rs=0.5 2, R=0.3 , Xs = 0.8 2, X = 1.2 2, and Xm = 20 Q respectively. Apply the approximate equivalent circuit to determine (a) (i) input impedance; and (9 marks) (ii) input power. (8 marks) (b) Formulate test procedures' criteria to evaluate the performance of an overhauled aircraft alternator.