I need the answer as soon as possible A 230 V DC shunt motor has a full-load efficiency of 89.9%. Rated (full) load is 40 hp.Motor losses, expressed as a percentage of output power are as follows: rotational losses -3.7%; armature copper loss - 3.9%; and, field copper loss - 2.5%. Stray load losses can beneglected. At full load, the motor speed is 1150 rpm. Neatly sketch an equivalent circuitfor the DC shunt motor, and determine:the field current;the armature current at full load;the armature current at half load;the armature current at no load; and,the shaft torque at full load.a.b.с.d.e.18

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Engineering

Electrical Engineering

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Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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Question

I need the answer as soon as possible

A 230 V DC shunt motor has a full-load efficiency of 89.9%. Rated (full) load is 40 hp.
Motor losses, expressed as a percentage of output power are as follows: rotational losses -
3.7%; armature copper loss - 3.9%; and, field copper loss - 2.5%. Stray load losses can be
neglected. At full load, the motor speed is 1150 rpm. Neatly sketch an equivalent circuit
for the DC shunt motor, and determine:
the field current;
the armature current at full load;
the armature current at half load;
the armature current at no load; and,
the shaft torque at full load.
a.
b.
с.
d.
e.
18

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