Q. 40 A separately excited dc machine is coupled to a 50 Hz, three-phase, 4-pole
induction machine as shown in figure. The dc machine is energized first and
the machines rotate at 1600 rpm. Subsequently the induction machine is also
connected to a 50 Hz, three-phase source, the phase sequence being consistent
with the direction of rotation. In steady state
(A) both machines act as generator
(B) the dc machine acts as a generator, and the induction machine acts as a
motor
(C) the dc machine acts as a motor, and the induction machine acts as a
generator
(D) both machines act as motors
Answer:(C)
Explanation:
