A compound generator has an efficiency of 87% at 200V, 10kW rated output. If the series field resistance of 0.03 ohm, armature resistance of 0.05 ohm and shunt field resistance is 50 ohms. Find the efliciency at half load
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A compound generator has an efficiency of 87% at 200V, 10kW rated output. If the series field resistance of 0.03 ohm, armature resistance of 0.05 ohm and shunt field resistance is 50 ohms. Find the efliciency at half load.
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- A shunt generator has a no-load terminal voltage of 270 and a voltage of 245 when it delivers 180 amp. Assume a straight-line characteristic and determine the following: the voltage when the current is 120 amp and What is the equivalent load resistance under this condition?A 110V shunt generator has a full load current of 100A, shunt field resistance of 55 ohms and constant losses of 500W. If full load efficiency is 88%, find the armature resistance. Assuming voltage to be constant at 110V, calculate the efficiency at half load. Find the load current.A 50 kW, 220 V, dc shunt generators has an armature resistance including brushes of 0.026 ohms. If the shunt field resistance is 52 Ω. Find the induced emf at rated load.
- A long shunt compound generator delivers 100 A at 250 V. The armature, shunt field and series field resistances are 0.02 Ohms, 50 Ohms and 0.05 Ohms respectively. If the Break Horse Power (BHP) or the power developed by the shaft torque of the driving engine is 40, determine the stray loss.Problem: The field current of a 100-kW, 250V shunt generator is 5A when delivering power at rated terminal voltage and rated load current. The combined armature and brush resistance is 0.1 ohm. 1.)Calculate the generated power in kW. 2.)What is the electrical efficiency? * Formatt: given required solution answerDetermine the e.m.f. generated of a short-shunt compound generator supplies 100 A at 400 V. If the field resistance, Rf =20 Ω, and the armature resistance, Ra =0.06 Ω. If you know that the volt drop in series winding is 2 V
- A 150-kW 250-volt compound generator is connected long shunt. If the shunt field resistance is 20 ohms, what is the series field-current at full load? (Ans.: 612.5 A) write diagram, given, etc6) A 15kW shunt generator having an Armature circuit Resistance of 0.2Ω and a field resistance of 200Ω, generates a terminal voltage of 220 V at full load. Find the Efficiency of the Generator at full load. Assume the Iron, Friction, and Windage losses are 0.5 kW.. A 480-V 200-kVA 0.8-power-factor-lagging 60-Hz two-pole Y-connected synchronous generator has asynchronous reactance of 0.25 Ω and an armature resistance of 0.03 Ω. At 60 Hz, its friction and windagelosses are 6 kW, and its core losses are 4 kW. The field circuit has a dc voltage of 200 V, and themaximum IF is 10 A. The resistance of the field circuit is adjustable over the range from 20 to 200 Ω.The OCC of this generator is shown in Figure P5-1.(a) How much field current is required to make VT equal to 480 V when the generator is running at noload?(b) What is the internal generated voltage of this machine at rated conditions?(c) How much field current is required to make VT equal to 480 V when the generator is running at ratedconditions?(d) How much power and torque must the generator’s prime mover be capable of supplying?
- A 10-kW, 120-V DC series generator has anarmature resistance of 0.1Ω and a series fieldresistance of 0.05Ω . Assuming that it is deliveringrated current at rated speed, find (a) the armaturecurrent and (b) the generated voltage.The armature winding resistance of a long shunt connected DC generator is 0.4ohm, the resistances of the shunt and serial field windings are 125 ohms and 0.1 ohms, respectively. While the generator supplies 8KW of power to the load it feeds, which is the voltage it produces since the output voltage is 250V?A long shunt cumulative compound dc generator delivers a load current of 60A at 440V. The shunt field resistance , series field resistance and armature resistance are 80, 0.9 and 0.4 respectively. Calculate the induced emf and load resistance.