A dc shunt motor runs at 900 rpm from a 460 V supply when taking an armature current of 25 A. Calculate the speed of which it will run from a 230 V supply when taking an armature current of 15 A. The resistance of the armature circuit is 0.8 ohm. Assume flux per pole at 230 V have to decrease to 75% of its value at 460 V
A dc shunt motor runs at 900 rpm from a 460 V supply when taking an armature current of 25 A. Calculate the speed of which it will run from a 230 V supply when taking an armature current of 15 A. The resistance of the armature circuit is 0.8 ohm. Assume flux per pole at 230 V have to decrease to 75% of its value at 460 V
Introductory Circuit Analysis (13th Edition)
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Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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A dc shunt motor runs at 900 rpm from a 460 V supply when taking an armature current of 25 A. Calculate the speed of which it will run from a 230 V supply when taking an armature current of 15 A. The resistance of the armature circuit is 0.8 ohm. Assume flux per pole at 230 V have to decrease to 75% of its value at 460 V
![A
B
D
A. 495
B. 485
C. 585
D. 595](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe0550107-d1d5-4a31-ad59-9f1cdcaee104%2Fac9e9e3f-142c-4566-bc46-d0689093730e%2F63i1tbg_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A
B
D
A. 495
B. 485
C. 585
D. 595
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