A 3 phase, 2300V, 100kVA, 60Hz, 6 pole sync. generator has stator reactance 7.9 ohm & magnetising reactance 56.5 ohm. Winding resistance neglible. Immediately after machine synchronised on bus, field current=23A, power input at prime mover = 3.75kW.
a) Determine Field current when generator supplying rated output at 0.9 lagging power factor?
b) What is Internal torque developed by machine when delivering output current of 15A and field current=20A?
c) what is power input at shaft required to drive machine out of synchronism at 20A field current?
Please can anyone help? I've been stuck on this question for a couple of weeks now!
a) Determine Field current when generator supplying rated output at 0.9 lagging power factor?
b) What is Internal torque developed by machine when delivering output current of 15A and field current=20A?
c) what is power input at shaft required to drive machine out of synchronism at 20A field current?
Please can anyone help? I've been stuck on this question for a couple of weeks now!
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