A shunt DC motor rated at 30 HP, 200 V, 1000 RPM, 120 Amperes armature current. The amature resistance of the motor is RA=0.05 2 and the field resistance R, =160 2.The adjustable resistance in the field circuit Radi is curently set to 402. %3D Armature reaction may be ignored in this machine. The magnetization curve for this motor taken at a speed of 1000RPM is given in tabular form below: If, A EA.V 0.1 0.25 0.52 0.75 1.0 1.2 1.5 1.75 2.00 10 50 110 160 235 260 275 290 295 300 If the motor is operating at its rated conditions: What is the shaft speed of this motor? Select one: O a. Speed n = 1340 RPM %3D O b. None O c. Speed n = 746 RPM !! O d. Speed n=1000 RPM

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A shunt DC motor rated at 30 HP, 200 V, 1000 RPM, 120 Amperes armature current. The amature
resistance of the motor is RA =0.052 and the field resistance R, =160 2.The adjustable
resistance in the field circuit Radi is curently set to 402.
Armature reaction may be ignored in this machine.
The magnetization curve for this motor taken at a speed of 1000RPM is given in tabular form below:
If, A
EA.V
0.1
0.25
0.52
0.75
1.0
1.2
1.5
1.75
2.00
10
50
110
160
235
260
275
290
295
300
If the motor is operating at its rated conditions: What is the shaft speed of this motor?
Select one:
O a. Speed n = 1340 RPM
Ob. None
C. Speed n = 746 RPM
O d. Speed n=1000 RPM
Transcribed Image Text:A shunt DC motor rated at 30 HP, 200 V, 1000 RPM, 120 Amperes armature current. The amature resistance of the motor is RA =0.052 and the field resistance R, =160 2.The adjustable resistance in the field circuit Radi is curently set to 402. Armature reaction may be ignored in this machine. The magnetization curve for this motor taken at a speed of 1000RPM is given in tabular form below: If, A EA.V 0.1 0.25 0.52 0.75 1.0 1.2 1.5 1.75 2.00 10 50 110 160 235 260 275 290 295 300 If the motor is operating at its rated conditions: What is the shaft speed of this motor? Select one: O a. Speed n = 1340 RPM Ob. None C. Speed n = 746 RPM O d. Speed n=1000 RPM
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