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- 6 shunt generators are running in parallel in a curtain generating station. Each generator supplies a load current of 500 A at 220 V. The shunt field current of each generator is 5 A and the armature resistance of each machine is 0.05 ohm. If one generator is suddenly switched off determine the percentage change in terminal voltage, the total load current being kept unchargedA dc generator is run at 500 rpm. The eddy current losses and hysteresis losses are found to be 100 and 200 W, respectively. At what speed will it be run to reduce the core losses by 20%?A wave wound armature of an eight-pole DC shunt generator has 51 slots, each
- A 6 pole DC lap wound generator has 41 armature conductors with flux per pole is 23 mWb and the e.m.f generated is 80 V, then the speed of the machine is O 0.74 rps O 84.84 rps O 7.43 rps 84.84 rpsA 6 pole DC lap wound generator has 32 armature conductors with flux per pole is 44 mWb and the e.m.f generated is 74 V, then the speed of the machine is O 3.28 rps 0.33 rps 52.56 rps O 52.56 rps arch opA DC generator with 8 pole, duplex lap winding excited with a flux of 3mWb/ pole. The number of parallel path in the winding is A 12 B 8 C 16 D 4
- Out of the following four sources of losses in a dc generator which one is minimum? Copper losses Hysteresis losses Winding losses Eddy current lossesA 100kW generator, 250V, 6 poles have a wave wound armature with 300 turns then the number of compensating winding turns per pole is if the ratio of pole arc/pole pitch is 0.72 bii 13 .approximately equal to ---- none of the mentioned. 18 8 50 O 16 O 36The emf induced in the dc generator armature winding is * O AC and DC O DC O None of the above O AC
- 1.Two identical shunt generators running in parallel, each with armature resistance of 0.02 ohms and field resistance of 50 ohms. The combined load current is 5000A. The field are so excited that the generated voltages of one machine is 610V and the other is 600V. The terminal voltage of this parallel combination will be. www Ish1 Rh1 a.350-360 V b.450-460 V c. 550-560V Rat www az G₂ Raz 5000 A Ish2DC shunt generator has a terminal voltage of 191 V and armature current of 0A (under no load), then the EMF generated is calculated asA four-pole, wave-wound generator has 220 coils of 10 turns each. The resistance of each turn is 0.02 2. Find the resistance of the armature winding.