A 450-V-rms, 50-Hz eight-pole delta-connected synchronous motoroperates with a developed power (including losses) of 150 kW and apower factor of 0.9 lagging. The synchronous
reactance is Xs = 1.6 ?. How much must the field current beincreased to produce 100 percent power
factor? Assume that Br is proportional to If with no magneticsaturation.
(I would be very grateful if you could write neatly :) )
