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A 30 kW, 200 V DC shunt motor drawing a full load armature current of 140 A. The armature resistance is 0.1 N. If the machine speed is 540 rpm and to be braked by plugging, compute (a) The maximum values of initial armature current if additional series resistance is 2 N. (b) The initial value of the braking torque.

A 30 kW, 200 V DC shunt motor drawing a full load armature current of 140 A. The armature resistance is 0.1 N. If the machine speed is 540 rpm and to be braked by plugging, compute (a) The maximum values of initial armature current if additional series resistance is 2 N. (b) The initial value of the braking torque.

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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Question 4 A 30 kW, 200 Vv DC shunt motor drawing a full load armature current of 140 A. The armature resistance is 0.1 N. If the machine speed is 540 rpm and to be braked by plugging, compute (a) The maximum values of initial armature current if additional series resistance is 2 Q. (b) The initial value of the braking torque.
Transcribed Image Text:Question 4 A 30 kW, 200 Vv DC shunt motor drawing a full load armature current of 140 A. The armature resistance is 0.1 N. If the machine speed is 540 rpm and to be braked by plugging, compute (a) The maximum values of initial armature current if additional series resistance is 2 Q. (b) The initial value of the braking torque.
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