Answer Happy

Posted: **Tue Jul 12, 2022 8:39 am**

: C A Separately Excited Dc Generator Is Rated At 172 Kw 430 V 400 A And 1800rpm Its Magnetization Curve Is Shown In Fig 1 (39.77 KiB) Viewed 29 times

: C A Separately Excited Dc Generator Is Rated At 172 Kw 430 V 400 A And 1800rpm Its Magnetization Curve Is Shown In Fig 2 (14.37 KiB) Viewed 29 times

: C A Separately Excited Dc Generator Is Rated At 172 Kw 430 V 400 A And 1800rpm Its Magnetization Curve Is Shown In Fig 3 (39.69 KiB) Viewed 29 times

c) A separately excited DC generator is rated at 172 kW,430 V,400 A and 1800rpm. Its magnetization curve is shown in Figure Q4(c). The generator's characteristics are: RA=0.05ΩRF=20ΩRadj=0 to 300Ω VF=430 VNF=1000 turns per pole (i) Sketch an equivalent circuit of the generator with proper labels. (2 marks) (ii) If Radj=63Ω, and the prime mover is driving at 1500rpm, calculate the generators' no-load terminal voltage. (3 marks) (iii) Calculate the terminal voltage if a 360 A load is connected to its terminal. Assuming the generator does not have compensating winding. Its armature reaction at this load is 450 A. turns. The prime mover is driving at 1500rpm. (4 marks)
For Q4(c)(iii), the terminal voltage is lower than no-load terminal voltage calculated from Q4(c) (ii). Investigate the adjustment of field current, IF and Radj to raise for the terminal voltage to match the no-load terminal voltage. (6 marks)
Internal eenerated volta2e E... V