A certain 110 V shunt generator has an armature and brush resistance of 0.06 ohm at full load of 85 A. The resistance of the shunt field is 45 ohms, and the stray power losses are found to be 897 watts. Determine the efficiency.
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A certain 110 V shunt generator has an armature and brush resistance of 0.06 ohm at full load of 85 A. The resistance of the shunt field is 45 ohms, and the stray power losses are found to be 897 watts. Determine the efficiency.
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- Problem: A shunt generator delivers 1,000 W at 142 V to a load. If the armature resistance is 0 Ω, and the shunt field resistance is 73 Ω, calculate the shunt field current in ampere (up to four decimal places).A 30 kW, 300 V , 4- pole lap series generator has 160 conductors and the resistance of each conductor is 0.005 Ω if mechanical efficiency is 95% and electrical efficiency is 95.45% Find: a- The losses in armature resistance. b- The resistance of series field. c-rotational lossesA series generator having a combined armature and field resistance of 04. Ohms is running at 1000 rpm and delivering 5.5 kW at a terminal voltage of 110V. If the speed is raised to 1500 rpm and the load adjusted to 10 kW. Find the new terminal voltage.
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- In a 110 V compound generator, the resistance of armature, shunt and series field winding are 0.06 Ω, 25 Ω and 0.04 Ω respectively. The load consists of 100 lamps, each rated as 55 W at 110 V. Find the total electromotive force and armature current when the machine is connected as (i) long shunt and (ii) short shunt.The DC shunt generator with the terminal voltage 300 V, armature drop 9 V and the total brush drop 4 V, then the value of generated emf isA shunt generator delivers 195 A at 250 V. The armature resistance and shunt field resistance are 0.02 Ω and 50 Ω respectively. The iron and friction losses are 950 W. Find overall efficiency a) at half load b) at ¼ full load