Consider a shunt DC motor with an armature resistance RA=0.2 ohm and terminal voltage VT = 160 V. The motor rated speed is 1800 RPM. The total field resistance 240 ohm. Assume No armature reaction in this machine. The variation of the armature terminal voltage as a function of the field current is measured under no-load conditions and shown below: Consider a shunt DC motor with an armature resistance RA=0.2 N and terminal voltage VT = 160 V. Themotor rated speed is 1800 RPM. The total field resistance 240 Q. Assume No armature reaction in thismachine.The variation of the armature terminal voltage as a function of the field current is measured under no-loadconditions and shown below:IF (A)EA (V)0.00.10.20.30.40.50.60.70.80.91.0306085102115125132137140141These values were taken at speed n= 1800 RPMIf the motor is driving a load at an armature current IA= 60 A, its rotational speed is 1517 RPM, withrotational losses of 848 Watt.What torque is induced by this motor?Select one:O a. Induced Torque = 62 N.mO b. NoneO c. Induced Torque = 56 N.mO d. Induced Torque = 51 N.m.

Given Data: VT = 160 V Ra = 0.2 ohm Ia = 60 A N = 1517 rpm Ploss = 848 Watt

Answered: Consider a shunt DC motor with an…

Introductory Circuit Analysis (13th Edition)

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Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

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Consider a shunt DC motor with an armature resistance RA=0.2 ohm and terminal voltage VT = 160 V. The motor rated speed is 1800 RPM. The total field resistance 240 ohm. Assume No armature reaction in this machine. The variation of the armature terminal voltage as a function of the field current is measured under no-load conditions and shown below:

Consider a shunt DC motor with an armature resistance RA=0.2 N and terminal voltage VT = 160 V. The
motor rated speed is 1800 RPM. The total field resistance 240 Q. Assume No armature reaction in this
machine.
The variation of the armature terminal voltage as a function of the field current is measured under no-load
conditions and shown below:
IF (A)
EA (V)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
30
60
85
102
115
125
132
137
140
141
These values were taken at speed n= 1800 RPM
If the motor is driving a load at an armature current IA= 60 A, its rotational speed is 1517 RPM, with
rotational losses of 848 Watt.
What torque is induced by this motor?
Select one:
O a. Induced Torque = 62 N.m
O b. None
O c. Induced Torque = 56 N.m
O d. Induced Torque = 51 N.m.

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