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A three-phase, 2200-V, 60-Hz, delta-connected, squirrel-cage induction motor, when started at full rated voltage, takes a starting current of 693 A from the line and develops a starting torque of 6250 N · m.
(a) Neglect the impedance and the exciting current of the compensator.
Calculate the ratio of a starting compensator (i.e., an auto-transformer starter) such that the current supplied by the 2200-V line is 300 A.
Compute the starting torque with the starting compen sator.
Q. Consider the circuit configuration shown in Figure. Let V i = 1V, R 1 = 1000, R 2 = 2000, and A = 3. (a) Compute i 2 . (b) If R 1 changed to 500 , recompute i 2 .
Q. Reduce the circuit of Figure to a Thévenin and a Norton equivalent circuit with respect to terminals a-b.
By means of mesh-current analysis, obtain the current in the 10-V source and the voltage across the 10- resistor in the circuit of Example.
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operation and application of Class AB amplifiers
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