A non–salient pole, three-phase, two-pole synchronous motor is connected in parallel with a three-phase, Y-connected load so that the per-phase equivalent circuit is as shown in Figure P19.46. The parallel combination is connected to a 220-V (line to line), 60-Hz, three-phase line. The load current IL is 25 A at a power factor of 0.866 inductive. The motor has XS = 2? and is operating with I f = 1 A and T = 50 N-m at a power angle of ?30°. (Neglect all losses for the motor.) Find IS , Pin (to the motor), the overall power factor (i.e., angle between I1 and VS ), and the total power drawn from the line.
Analysis:
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