Q1. The following data refer to the O.c.C of a D.C separately excited generator at 1000 rpm.Field current in A0.20.40.60.81.2Amature voltage in Vv75100145178195204The machine is now connected as a shunt generator with a total field resistance of 200 n and driven at1000 rpm. Estimate graphically: (i) the voltage to which the generator 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 Ra to be 0.8 2. (i) Finally estimatethe steady state armature curent when the machine terminals are shorted.Q2. A shunt generator gave the following results in the O.C.C. test at a speed of (800 r.p.m).k in A1359.10E, in V90250300330350360The field resistance is adjusted to (50 2) and the teminal voltage is (300 V) on load. Annatureresistance is (0.1 2) and assuming that the flux is reduced by (5%) due to amature reaction, find theload supplied by the generator.Q3. The following data are taken to obtain the magnetization curve of a 15-kW, 150-V, 6-pole de machineat its rated speed of 1200 rpm.Ir in A0.51.52.53.3.54.5Eo in V70112130140145149152155158Sketch the magnetization curves for speeds of 1200 rpm and 800 rpm.

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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 curent in A 0.2 0.4 0.6 0.8 1.2 Amature voltage in V 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 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 armat ure resistance Ra to be 0.8 2. (i) Finally estimate the steady state armature curent when the machine teminals 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 1.2 Amature voltage in V 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 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 armat ure resistance Ra to be 0.8 2. (i) Finally estimate the steady state armature curent when the machine teminals 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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