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160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 ok Shunt field current, A 1000 2000 3000 4000 S000 6000 7000 Field mmf. A turns Figure 4(e) Terminal and generated voltage, V (c) The magnetization curve for a separately excited DC generator is shown in Figure Q4 (c). The generator is rated at 6 kW, 130 V, 50 A, and 1600 r/min. Its field circuit is rated at 5 A. The following data are known about the machine: RA = 0.18 N Radj = 0 to 40 N Ng = 1000 turns per pole VF = 130 V Rp = 20 N Answer the following questions about this generator, assuming no armature reaction. (i) Determine the range of voltage adjustments that can be achieved by changing Radj if this generator is operating at no load. (ii) Analyze the maximum and minimum no-load voltages in the generator if the field rheostat is allowed to vary from 0 to 40 N and the generator's speed is allowed to vary from 1400 to 2000 r/min. (iii) Analyse the field current that must be flowing in the generator if the armature current of the generator is 50 A, the speed of the generator is 1500 r/min, and the terminal voltage is 106 V.

160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 ok Shunt field current, A 1000 2000 3000 4000 S000 6000 7000 Field mmf. A turns Figure 4(e) Terminal and generated voltage, V (c) The magnetization curve for a separately excited DC generator is shown in Figure Q4 (c). The generator is rated at 6 kW, 130 V, 50 A, and 1600 r/min. Its field circuit is rated at 5 A. The following data are known about the machine: RA = 0.18 N Radj = 0 to 40 N Ng = 1000 turns per pole VF = 130 V Rp = 20 N Answer the following questions about this generator, assuming no armature reaction. (i) Determine the range of voltage adjustments that can be achieved by changing Radj if this generator is operating at no load. (ii) Analyze the maximum and minimum no-load voltages in the generator if the field rheostat is allowed to vary from 0 to 40 N and the generator's speed is allowed to vary from 1400 to 2000 r/min. (iii) Analyse the field current that must be flowing in the generator if the armature current of the generator is 50 A, the speed of the generator is 1500 r/min, and the terminal voltage is 106 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
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160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 ok Shunt field current, A 1000 2000 3000 4000 S000 6000 7000 Field mmf. A turns Figure 4(e) Terminal and generated voltage, V
Transcribed Image Text:160 150 140 130 120 110 100 90 80 70 60 50 40 30 20 10 ok Shunt field current, A 1000 2000 3000 4000 S000 6000 7000 Field mmf. A turns Figure 4(e) Terminal and generated voltage, V
(c) The magnetization curve for a separately excited DC generator is shown in Figure Q4 (c). The generator is rated at 6 kW, 130 V, 50 A, and 1600 r/min. Its field circuit is rated at 5 A. The following data are known about the machine: RA = 0.18 N Radj = 0 to 40 N Ng = 1000 turns per pole VF = 130 V Rp = 20 N Answer the following questions about this generator, assuming no armature reaction. (i) Determine the range of voltage adjustments that can be achieved by changing Radj if this generator is operating at no load. (ii) Analyze the maximum and minimum no-load voltages in the generator if the field rheostat is allowed to vary from 0 to 40 N and the generator's speed is allowed to vary from 1400 to 2000 r/min. (iii) Analyse the field current that must be flowing in the generator if the armature current of the generator is 50 A, the speed of the generator is 1500 r/min, and the terminal voltage is 106 V.
Transcribed Image Text:(c) The magnetization curve for a separately excited DC generator is shown in Figure Q4 (c). The generator is rated at 6 kW, 130 V, 50 A, and 1600 r/min. Its field circuit is rated at 5 A. The following data are known about the machine: RA = 0.18 N Radj = 0 to 40 N Ng = 1000 turns per pole VF = 130 V Rp = 20 N Answer the following questions about this generator, assuming no armature reaction. (i) Determine the range of voltage adjustments that can be achieved by changing Radj if this generator is operating at no load. (ii) Analyze the maximum and minimum no-load voltages in the generator if the field rheostat is allowed to vary from 0 to 40 N and the generator's speed is allowed to vary from 1400 to 2000 r/min. (iii) Analyse the field current that must be flowing in the generator if the armature current of the generator is 50 A, the speed of the generator is 1500 r/min, and the terminal voltage is 106 V.
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