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A d.c. shunt motor is rated 100 hp, 600 V, 1800 r.p.m., and is 88 % efficient when operating at rated conditions. The armature circuit resistance is 0.05 N and the field resistance is 75 N. Find: i. The rated shaft torque ii. The developed power at rated conditions iii. The developed torque at rated conditions iv. The external resistance required to limit the starting armature current to 150 % of the rated armature current

A d.c. shunt motor is rated 100 hp, 600 V, 1800 r.p.m., and is 88 % efficient when operating at rated conditions. The armature circuit resistance is 0.05 N and the field resistance is 75 N. Find: i. The rated shaft torque ii. The developed power at rated conditions iii. The developed torque at rated conditions iv. The external resistance required to limit the starting armature current to 150 % of the rated armature current

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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A d.c. shunt motor is rated 100 hp, 600 V, 1800 r.p.m., and is 88 % efficient when operating at rated conditions. The armature circuit resistance is 0.05 N and the field resistance is 75 . Find: i. The rated shaft torque ii. The developed power at rated conditions iii. The developed torque at rated conditions iv. The external resistance required to limit the starting armature current to 150 % of the rated armature current The developed torque at starting. v.
Transcribed Image Text:A d.c. shunt motor is rated 100 hp, 600 V, 1800 r.p.m., and is 88 % efficient when operating at rated conditions. The armature circuit resistance is 0.05 N and the field resistance is 75 . Find: i. The rated shaft torque ii. The developed power at rated conditions iii. The developed torque at rated conditions iv. The external resistance required to limit the starting armature current to 150 % of the rated armature current The developed torque at starting. v.
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