Q1. 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 0.6 0.8 1 1.2 Ammature 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: (i) 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 Ra to be 0.8 n (ii) Finally estimate the steady state armature current when the machine terminals are shorted.

Q1. 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 0.6 0.8 1 1.2 Ammature 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: (i) 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 Ra to be 0.8 n (ii) Finally estimate the steady state armature current 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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Q1. 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 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 Sn and driven at 1000 rpm. Estimate graphically: (i) the voltage to which the generat or 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. (iii) Finally estimate the steady state armature curent when the machine terminals are shorted.
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