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(b) A 200 kW, 200 V, 4-pole, 800 rpm, separately excited DC generator is suggested to deliver the rated load at the rated voltage in a factory. The generator has the following details: Ra= 0.03 2, RF = 20 92, VF = 100 V, NF = 400 turns per pole, and Prot+Pcore= 8 kW. The demagnetising MMF due to armature reaction is 20% of the armature current. Its magnetisation curve is shown in Figure Q4(b). (i) Determine the induced EMF at full load. (ii) Identify the power developed. (iii) Discover the torque developed.

(b) A 200 kW, 200 V, 4-pole, 800 rpm, separately excited DC generator is suggested to deliver the rated load at the rated voltage in a factory. The generator has the following details: Ra= 0.03 2, RF = 20 92, VF = 100 V, NF = 400 turns per pole, and Prot+Pcore= 8 kW. The demagnetising MMF due to armature reaction is 20% of the armature current. Its magnetisation curve is shown in Figure Q4(b). (i) Determine the induced EMF at full load. (ii) Identify the power developed. (iii) Discover the torque developed.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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(b) A 200 kW, 200 V, 4-pole, 800 rpm, separately excited DC generator is suggested to deliver the rated load at the rated voltage in a factory. The generator has the following details: Ra= 0.03 92, RF = 20 92, VF = 100 V, NF = 400 turns per pole, and Prot + Pcore = 8 kW. The demagnetising MMF due to armature reaction is 20% of the armature current. Its magnetisation curve is shown in Figure Q4(b). (i) Determine the induced EMF at full load. (ii) Identify the power developed. (iii) Discover the torque developed.
Transcribed Image Text:(b) A 200 kW, 200 V, 4-pole, 800 rpm, separately excited DC generator is suggested to deliver the rated load at the rated voltage in a factory. The generator has the following details: Ra= 0.03 92, RF = 20 92, VF = 100 V, NF = 400 turns per pole, and Prot + Pcore = 8 kW. The demagnetising MMF due to armature reaction is 20% of the armature current. Its magnetisation curve is shown in Figure Q4(b). (i) Determine the induced EMF at full load. (ii) Identify the power developed. (iii) Discover the torque developed.
(iv) Point out the applied torque. (v) Analyse the efficiency of this generator under the armature reaction effect. Figure Q4(b) 0 1 2 3 4 Field current (A) 5 6 7 8 9 10 10 Induced EMF (V) 320 360 400
Transcribed Image Text:(iv) Point out the applied torque. (v) Analyse the efficiency of this generator under the armature reaction effect. Figure Q4(b) 0 1 2 3 4 Field current (A) 5 6 7 8 9 10 10 Induced EMF (V) 320 360 400
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