(c) A 200 V, 1000 rpm, 100 A DC separately excited motor has an armature resistance of 0.05 Ohm. The motor is set to be braked by plugging from an initial speed of 1200 rpm. Determine; (i) the resistance to be placed at the armature circuit to limit the braking current to twice of the full load value.
(c) A 200 V, 1000 rpm, 100 A DC separately excited motor has an armature resistance of 0.05 Ohm. The motor is set to be braked by plugging from an initial speed of 1200 rpm. Determine; (i) the resistance to be placed at the armature circuit to limit the braking current to twice of the full load value.
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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Question
Do C (i), (ii) and (iii) calculation
Transcribed Image Text:(ii) the braking torque
(iii) the torque when the speed is fallen to zero.
Transcribed Image Text:(a) (i) Explain the concepts of constant speed drive and variable speed drive in
electric machine applications.
(ii) List THREE (3) types of motor used in electrical drives.
(b) Explain the concept of motoring and braking conditions of machine motor. By
appropriate expressions and diagrams might be required to support your
explanations.
(c) A 200 V, 1000 rpm, 100 A DC separately excited motor has an armature
resistance of 0.05 Ohm. The motor is set to be braked by plugging from an
initial speed of 1200 rpm. Determine;
(i) the resistance to be placed at the armature circuit to limit the braking
current to twice of the full load value.
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