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Problem 1: A DC machine is rated 10 KW, 250 V, 1750 rpm and has armature and field winding resistances of 0.2 0 and 125 0, respectively. The machine is self-excited and is driven at 1750 rpm. The data for magnetization curve are E, (V) It (A) 15 50 100 150 188 212 250 275 305 330 0.1 0.2 0.3 0.4 0.5 0.75 1.0 1.5 2.0 a) Determine the generated voltage with no field current b) Determine the resistance of the field rheostat if the no-load terminal voltage is 250 V

Problem 1: A DC machine is rated 10 KW, 250 V, 1750 rpm and has armature and field winding resistances of 0.2 0 and 125 0, respectively. The machine is self-excited and is driven at 1750 rpm. The data for magnetization curve are E, (V) It (A) 15 50 100 150 188 212 250 275 305 330 0.1 0.2 0.3 0.4 0.5 0.75 1.0 1.5 2.0 a) Determine the generated voltage with no field current b) Determine the resistance of the field rheostat if the no-load terminal voltage is 250 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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O File D:/RedRi... Not syncing of 1 Electrical Machines 1 Assignment on DC Generator Shunt Generator Problem 1: A DC machine is rated 10 KW, 250 V, 1750 rpm and has armature and field winding resistances of 0.2 0 and 125 Q, respectively. The machine is self-excited and is driven at 1750 rpm. The data for magnetization curve are E, (V) It (A) 15 50 100 150 188 212 250 275 305 330 0.1 0.2 0.3 0.4 0.5 0.75 1.0 1.5 2.0 a) Determine the generated voltage with no field current b) Determine the resistance of the field rheostat if the no-load terminal voltage is 250 V Problem 2: The self - excited DC machine in the previous problem delivers rated load when driven at 1750 rpm. The rotational loss is 450 W. Determine: a) The field current b) The armature current c) The generated voltage d) The efficiency of the generator Problem 6: A 10 KW, 120 V DC shunt generator has an armature circuit resistance of 0.2 Q and a field circuit resistance of 240 Q. The generator delivers rated current at rated voltage and rated speed. Determine: a) The armature current b) The armature induced voltage hl_A3_Separatle.pdf an file
Transcribed Image Text:O File D:/RedRi... Not syncing of 1 Electrical Machines 1 Assignment on DC Generator Shunt Generator Problem 1: A DC machine is rated 10 KW, 250 V, 1750 rpm and has armature and field winding resistances of 0.2 0 and 125 Q, respectively. The machine is self-excited and is driven at 1750 rpm. The data for magnetization curve are E, (V) It (A) 15 50 100 150 188 212 250 275 305 330 0.1 0.2 0.3 0.4 0.5 0.75 1.0 1.5 2.0 a) Determine the generated voltage with no field current b) Determine the resistance of the field rheostat if the no-load terminal voltage is 250 V Problem 2: The self - excited DC machine in the previous problem delivers rated load when driven at 1750 rpm. The rotational loss is 450 W. Determine: a) The field current b) The armature current c) The generated voltage d) The efficiency of the generator Problem 6: A 10 KW, 120 V DC shunt generator has an armature circuit resistance of 0.2 Q and a field circuit resistance of 240 Q. The generator delivers rated current at rated voltage and rated speed. Determine: a) The armature current b) The armature induced voltage hl_A3_Separatle.pdf an file
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