Q4 A 7.48 kW, 220 V, 990 rpm shunt motor has a full load efficiency of 88%, the armature resistance is 0.08 ohm and shunt field current is 2 A. If the speed of this motor is reduced to 450 rpm by inserting a resistance in the armature circuit, find the motor output, the armature current, and overall efficiency. (23 mark)
Q4 A 7.48 kW, 220 V, 990 rpm shunt motor has a full load efficiency of 88%, the armature resistance is 0.08 ohm and shunt field current is 2 A. If the speed of this motor is reduced to 450 rpm by inserting a resistance in the armature circuit, find the motor output, the armature current, and overall efficiency. (23 mark)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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![Q4 A 7.48 kW, 220 V, 990 rpm shunt motor has a full load efficiency of 88%, the
armature resistance is 0.08 ohm and shunt field current is 2 A. If the speed of this motor
is reduced to 450 rpm by inserting a resistance in the armature circuit, find the motor
output, the armature current, and overall efficiency.
(23 mark)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F48472935-3848-41ac-9c9f-ad0b7b4b54a1%2Ffdb5e197-8034-4bcd-aa64-ce21fe19b3f5%2Fdbie2x_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Q4 A 7.48 kW, 220 V, 990 rpm shunt motor has a full load efficiency of 88%, the
armature resistance is 0.08 ohm and shunt field current is 2 A. If the speed of this motor
is reduced to 450 rpm by inserting a resistance in the armature circuit, find the motor
output, the armature current, and overall efficiency.
(23 mark)
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