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H.W1 The following figures give the open circuit characteristics of a dc shunt generator at 300 rpm. (A) 0.2 0.3 0.4 0.5 0.6 0.7 V(V) 7.5 93 135 165 186 202 215 The field resistance of the machine is adjusted to 354.5 Q and the speed is 300 rpm. The voltage drop across the armature resistance, I R is 12 volts. 1-Determine graphically the no-load voltage 2-Determine the full load voltage. Neglect armature reaction effects 3-Repeat (2), assuming that the effect of armature reaction at full load is equivalent to 0.05 field amperes 4-Determine the critical resistance 5-Determine the critical speed for the given field resistance 6-What additional resistance must be inserted in the field circuit to reduce the load voltage to 175 V.

H.W1 The following figures give the open circuit characteristics of a dc shunt generator at 300 rpm. (A) 0.2 0.3 0.4 0.5 0.6 0.7 V(V) 7.5 93 135 165 186 202 215 The field resistance of the machine is adjusted to 354.5 Q and the speed is 300 rpm. The voltage drop across the armature resistance, I R is 12 volts. 1-Determine graphically the no-load voltage 2-Determine the full load voltage. Neglect armature reaction effects 3-Repeat (2), assuming that the effect of armature reaction at full load is equivalent to 0.05 field amperes 4-Determine the critical resistance 5-Determine the critical speed for the given field resistance 6-What additional resistance must be inserted in the field circuit to reduce the load voltage to 175 V.

Introductory Circuit Analysis (13th Edition)
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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H.W1 The following figures give the open circuit characteristics of a dc shunt generator at 300 rpm. (A) 0.2 0.3 0.4 0.5 0.6 0.7 V(V) 7.5 93 135 165 186 202 215 The field resistance of the machine is adjusted to 354.5 0 and the speed is 300 rpm. The voltage drop across the armature resistance, I R is 12 volts. 1-Determine graphically the no-load voltage 2-Determine the full load voltage. Neglect armature reaction effects 3-Repeat (2), assuming that the effect of armature reaction at full load is equivalent to 0.05 field amperes 4-Determine the critical resistance 5-Determine the critical speed for the given field resistance 6-What additional resistance must be inserted in the field circuit to reduce the load voltage to 175 V.
Transcribed Image Text:H.W1 The following figures give the open circuit characteristics of a dc shunt generator at 300 rpm. (A) 0.2 0.3 0.4 0.5 0.6 0.7 V(V) 7.5 93 135 165 186 202 215 The field resistance of the machine is adjusted to 354.5 0 and the speed is 300 rpm. The voltage drop across the armature resistance, I R is 12 volts. 1-Determine graphically the no-load voltage 2-Determine the full load voltage. Neglect armature reaction effects 3-Repeat (2), assuming that the effect of armature reaction at full load is equivalent to 0.05 field amperes 4-Determine the critical resistance 5-Determine the critical speed for the given field resistance 6-What additional resistance must be inserted in the field circuit to reduce the load voltage to 175 V.
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