Q1. The following data refer to the O.C.C of a D.C separately excited generator at 1000 rpm.Field current in A0.20.40.60.811.2Amature voltage in V575100145178195204The machine is now connected as a shunt generator with a total field resistance of 200 Sn and driven at1000 rpm. Estimate graphically: (i) the voltage to which the generat or will build up at no load. (ii) thearmature, field and load currents when the teminal voltage is found to be 150 V. Neglect the effect ofarmature reaction and brush drop and assume armature resistance Rato be 0.8 2. (iii) Finally estimatethe steady state armature curent when the machine terminals are shorted.

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QI. The following data refer to the O.C.C of a D.C separately excited generator at 1000 rpm. Field curent in A 0.2 0.4 0.8 12 0.6 Amature voltage in v 5 75 100 145 178 195 204 The machine is now connected as a shunt generator with a total field resistance of 200 2 and driven at 1000 rpm. Estimate graphically: (1) the voltage to which the generator will build up at no load. (ii) the armature, field and load currents when the teminal voltage is found to be 150 V. Neglect the effect of armature reaction and brush drop and assume armature resistance Rato be 0.8 2 (ii) Finally estimate the steady state armature curent when the machine terminals are shorted.

QI. The following data refer to the O.C.C of a D.C separately excited generator at 1000 rpm. Field curent in A 0.2 0.4 0.8 12 0.6 Amature voltage in v 5 75 100 145 178 195 204 The machine is now connected as a shunt generator with a total field resistance of 200 2 and driven at 1000 rpm. Estimate graphically: (1) the voltage to which the generator will build up at no load. (ii) the armature, field and load currents when the teminal voltage is found to be 150 V. Neglect the effect of armature reaction and brush drop and assume armature resistance Rato be 0.8 2 (ii) Finally estimate the steady state armature curent when the machine terminals are shorted.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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QI. The following data refer to the O.c.C of a D.C separately excited generator at 1000 rpm. Field current in A 0.2 0.4 0.6 0.8 1.2 Amature voltage in V 5 75 100 145 178 195 204 The machine is now connected as a shunt generator with a total field resistance of 200 2 and driven at 1000 pm. Estimate graphically: (i) the voltage to which the generat or will build up at no load. (ii) the amature, field and load curents when the teminal voltage is found to be 150 V. Neglect the effect of armature reaction and brush drop and assume armature resistance Rato be 0.8 2 (iii) Finally estimate the steady state armature current when the machine terminals are shorted.
In a 4 pole DC shunt generator with a shunt field resistance of 100 ohms and an armature resistance of 1 ohm has 378 wave connected conductors in its armature. The flux per pole is 0.02 Wb. If a load resistance of 10 ohms is connected across the load terminals and the generator is driven at 1000 rpm, calculate the power absorbed by the load.
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State two reasons why a self-excited shunt dc generator may fail to build up a voltage. In each (both) case, briefly explain what can be done to correct the problem. Reason #1 Solution #1 Reason #2 Solution #2
Please see attached picture