A separately excited DC motor presents the following plate data. • armature voltage: V • amature current: I = 30 A = 220 V an an • speed: n = 3000 rpm • excitation voltage: V = 80 V excitation current: I = 4 A starting current: I = 180 A Neglecting the no load losses and the saturation of the magnetic circuit, evaluate: 1) the amature resistance Ra %3D 2) the coefficent between e.m.f. and speed [Vrad/s] 3) the rated torque [Nm] 4) the rated efficiency [%] 5) the speed when the motor delivers 1.5 T (constant flux) n = [rpm]
A separately excited DC motor presents the following plate data. • armature voltage: V • amature current: I = 30 A = 220 V an an • speed: n = 3000 rpm • excitation voltage: V = 80 V excitation current: I = 4 A starting current: I = 180 A Neglecting the no load losses and the saturation of the magnetic circuit, evaluate: 1) the amature resistance Ra %3D 2) the coefficent between e.m.f. and speed [Vrad/s] 3) the rated torque [Nm] 4) the rated efficiency [%] 5) the speed when the motor delivers 1.5 T (constant flux) n = [rpm]
Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter12: Power System Controls
Section: Chapter Questions
Problem 12.4P
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Question
![A separately excited DC motor presents the following plate data:
•armature voltage: V =220 V
an
• amature current: I = 30 A
an
• speed: n = 3000 rpm
excitation voltage: V = 80 V
2610021
excitation current: I = 4 A
starting current: I = 180 A
Neglecting the no load losses and the saturation of the magnetic circuit, evaluate:
1) the amature resistance
Ra =
%3D
2) the coefficent between e.m.f. and
speed
Ko
[Virad/s]
3) the rated torque
4) the rated efficiency
5) the speed when the motor delivers 1.5 T (constant flux)
n =](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5c943484-fef8-43d3-80f6-edbb4b4bec0e%2F2fa83f89-e1f6-4d83-a7f4-38eafa9e46ed%2Fo3zco4i_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A separately excited DC motor presents the following plate data:
•armature voltage: V =220 V
an
• amature current: I = 30 A
an
• speed: n = 3000 rpm
excitation voltage: V = 80 V
2610021
excitation current: I = 4 A
starting current: I = 180 A
Neglecting the no load losses and the saturation of the magnetic circuit, evaluate:
1) the amature resistance
Ra =
%3D
2) the coefficent between e.m.f. and
speed
Ko
[Virad/s]
3) the rated torque
4) the rated efficiency
5) the speed when the motor delivers 1.5 T (constant flux)
n =
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