Question 2 (20 marks) (a) A separately excited dc generator is shown in Figure 1. The generator is initially running ste

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Question 2 20 Marks A A Separately Excited Dc Generator Is Shown In Figure 1 The Generator Is Initially Running Ste 1 (78.66 KiB) Viewed 26 times

Question 2 (20 marks) (a) A separately excited dc generator is shown in Figure 1. The generator is initially running steady-state conditions at V1 = VE = 200 V and nm = 2000 r/min, with a field resistance of 50 2. The rotor of the generator has a moment of inertia of 5 kg.m? IL W RA TE VFV VT LF Figure 1 i. Calculate the torque of the generator, t, given that the (5 marks) generator's speed increases to 2500 r/min in 5 s. ii. Determine the change in kinetic energy of the generator (5 marks) for part (i). iii. Calculate the generator power, P, if the speed of the (4 marks) generator is 2200 r/min. (b) Using diagrams and all terms for rotation where necessary, (6 marks) discuss the operation of a real dc machine used as a dc generator when an external torque is applied to the rotor in the direction of rotation while it is initially running at no-load steady-state conditions.