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A 50-hp, 250-V, 1200-rpm DC shunt motor has an armature resistance (including the brushes, compensating windings and interpoles) of 0.06 O. Its field circuit has a total resistance Radj + RF of 50 Q, which produces a no-load speed of 1200 rpm. Given that the armature reaction at full load is equivalent to 0. 7 A.field-current. The magnetization data at 1200 rpm is tabulated in TABLE Q1. Calculate the speed and output torque of this motor when its input current is 200 A for the following conditions: а. With compensating windings b. Without compensating windings С. Discuss the different of speed and torque obtained in part (a) and part (b). Justify your answer. TABLE Q1 Ea, (V) 100 230 250 290 Ii, (A) 1.6 4.3 5.0 8.9

A 50-hp, 250-V, 1200-rpm DC shunt motor has an armature resistance (including the brushes, compensating windings and interpoles) of 0.06 O. Its field circuit has a total resistance Radj + RF of 50 Q, which produces a no-load speed of 1200 rpm. Given that the armature reaction at full load is equivalent to 0. 7 A.field-current. The magnetization data at 1200 rpm is tabulated in TABLE Q1. Calculate the speed and output torque of this motor when its input current is 200 A for the following conditions: а. With compensating windings b. Without compensating windings С. Discuss the different of speed and torque obtained in part (a) and part (b). Justify your answer. TABLE Q1 Ea, (V) 100 230 250 290 Ii, (A) 1.6 4.3 5.0 8.9

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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A 50-hp, 250-V, 1200-rpm DC shunt motor has an armature resistance (including the brushes, compensating windings and interpoles) of 0.06 Q. Its field circuit has a total resistance Radj + RF of 50 Q, which produces a no-load speed of 1200 rpm. Given that the armature reaction at full load is equivalent to 0. 7 A.field-current. The magnetization data at 1200 rpm is tabulated in TABLE Q1. Calculate the speed and output torque of this motor when its input current is 200 A for the following conditions: a. With compensating windings b. Without compensating windings С. Discuss the different of speed and torque obtained in part (a) and part (b). Justify your answer. TABLE Q1 Ea, (V) 100 230 250 290 It, (A) 1.6 4.3 5.0 8.9
Transcribed Image Text:A 50-hp, 250-V, 1200-rpm DC shunt motor has an armature resistance (including the brushes, compensating windings and interpoles) of 0.06 Q. Its field circuit has a total resistance Radj + RF of 50 Q, which produces a no-load speed of 1200 rpm. Given that the armature reaction at full load is equivalent to 0. 7 A.field-current. The magnetization data at 1200 rpm is tabulated in TABLE Q1. Calculate the speed and output torque of this motor when its input current is 200 A for the following conditions: a. With compensating windings b. Without compensating windings С. Discuss the different of speed and torque obtained in part (a) and part (b). Justify your answer. TABLE Q1 Ea, (V) 100 230 250 290 It, (A) 1.6 4.3 5.0 8.9
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