A 240 V, 4 -pole shunt motor has an armature resistance Of 0.42 and a field resistance of 2402. When driving at 700 r.p.m. aload, the torque of which is proportional to the speed, the armature current is 20A. It is desired to rise the speed from 700 to 900 r.p.m., what resistance must be inserted in the shunt field circuit, assuming the magnetization curve to be a straight line?
A 240 V, 4 -pole shunt motor has an armature resistance Of 0.42 and a field resistance of 2402. When driving at 700 r.p.m. aload, the torque of which is proportional to the speed, the armature current is 20A. It is desired to rise the speed from 700 to 900 r.p.m., what resistance must be inserted in the shunt field circuit, assuming the magnetization curve to be a straight line?
Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter32: Three-phase Motors
Section: Chapter Questions
Problem 6RQ: Name three factors that determine the torque produced by an induction motor.
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