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A 2500 V,50 Hz,1000hp0.85PF leading four poles Y-connected synchronous motor has a synchronous reactance of 1.5Ω and neg
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A 2500 V,50 Hz,1000hp0.85PF leading four poles Y-connected synchronous motor has a synchronous reactance of 1.5Ω and neg
A 2500 V,50 Hz,1000hp0.85PF leading four poles Y-connected synchronous motor has a synchronous reactance of 1.5Ω and negligible armature resistance. Ignore its friction, windage, and core losses for the purposes of this problem. (i) If this motor is initially supplying 1000hp at 0.85PF lagging, determine the magnitudes and angles of EA and IA. (6 marks) (ii) Based on Q2(b)(i), sketch the phasor diagram of this motor. (4 marks) (iii) Calculate the torque that this motor is producing, τind and the maximum possible induced torque for this motor, τind,max. (5 marks) (iv) If the magnitude of the internal generated voltage, ∣EA∣ is increased by 15 percent, determine the new magnitude of the armature current and its new PF. (6 marks)