1. 414 Volt, 60 Hz, 600 hp, 0.6 pf-leading, four-pole triangleconnected synchronous motor has 0.9Ω synchronous reactance.Friction; wind; core losses and armature resistance areneglected.
a) If the motor is operating under magnitude of phase current (ia)234 Ampere and power factor of 0.6 lagging,
1. Find the input power of motor in hp (10p)
2. Find the generated voltage, EA (10p)
3. Find the torque and the maximum inducible torque in currentstate. (10p)
b) If EA is increased by 18% find,
1. Magnitude of new armature current (ia), (10p)
2. New power factor of motor. (10p)
(X is the last two digits of your student number × 2. For example:If student number is 20-156-120, X=54. Motor voltage is found360+(54*2) = 468V.)
(Please use at least 4 digits after decimal point in yourcalculations. Otherwise, there may be problems about exactanswers.)
