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Q.2- A 4-pole, 500V, 100 hp, wave connected motor has 492 conductors. The flux per pole is 50 mWb and full-load efficiency is 92%. Its shunt field resistance is 250 N and armature circuit resistance is 0.1 2, calculate for full load: a. motor speed. b. the useful torque developed (output torque). Ans. 590 r.p.m. , 1207 N.m

Q.2- A 4-pole, 500V, 100 hp, wave connected motor has 492 conductors. The flux per pole is 50 mWb and full-load efficiency is 92%. Its shunt field resistance is 250 N and armature circuit resistance is 0.1 2, calculate for full load: a. motor speed. b. the useful torque developed (output torque). Ans. 590 r.p.m. , 1207 N.m

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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Q.1- A d.c. shunt machine has armature and field resistances of 0.025 2 and 80 2 respectively. When connected to const 400 V bus-bars and driven as a generator at 450 r.p.m. it delivers 120 Kw. Calculate its speed when running as a motor and absorbing 120 Kw from the same bus-bar. Also, deduce the direction rotation of this machine when it is working as a motor assuming clockwise rotation as a generator. Ans. 435 r.p.m. Q.2- A 4-pole, 500V, 100 hp, wave connected motor has 492 conductors. The flux per pole is 50 mWb and full-load efficiency is 92%. Its shunt field resistance is 250 2 and armature circuit resistance is 0.1 Q, calculate for full load: a. motor speed. b. the useful torque developed (output torque). Ans. 590 r.p.m. , 1207 N.m
Transcribed Image Text:Q.1- A d.c. shunt machine has armature and field resistances of 0.025 2 and 80 2 respectively. When connected to const 400 V bus-bars and driven as a generator at 450 r.p.m. it delivers 120 Kw. Calculate its speed when running as a motor and absorbing 120 Kw from the same bus-bar. Also, deduce the direction rotation of this machine when it is working as a motor assuming clockwise rotation as a generator. Ans. 435 r.p.m. Q.2- A 4-pole, 500V, 100 hp, wave connected motor has 492 conductors. The flux per pole is 50 mWb and full-load efficiency is 92%. Its shunt field resistance is 250 2 and armature circuit resistance is 0.1 Q, calculate for full load: a. motor speed. b. the useful torque developed (output torque). Ans. 590 r.p.m. , 1207 N.m
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