A 3-phase 400 V (line-to-line) wye-connected synchronous motor has X, = 1.0 ohm/phase and a negligible armature resistance. The field current is so adjusted that the internal (induced) voltage is 270...

Extracted text: A 3-phase 400 V (line-to-line) wye-connected synchronous motor has X, = 1.0 ohm/phase and a negligible armature resistance. The field current is so adjusted that the internal (induced) voltage is 270 V/phase, while the motor draws 40 kW power from the source. Calculate the (a) power factor of the motor; and (b) reactive power supplied by the motor to the source. 6.66. Ans. (a) 0.87 leading; (b) -22.72 kvar