A 250 V dc shunt motor takes a current of 30A on a certain load. R= 12 and Rah= 125 Q. Find the resistance to be inserted in series with the armature to reduce the speed to 60% of its original value if the load torque is constant.

A 250 V dc shunt motor takes a current of 30A on a certain load. R= 12 and Rah= 125 Q. Find the resistance to be inserted in series with the armature to reduce the speed to 60% of its original value if the load torque is constant.

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 13RQ: A squirrel-cage induction motor is operating at 1175 RPM and producing a torque of 22 Ib-ft. What is...

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A 250 V de shunt motor takes a current of 30A on a certain load. R= 12 and Rsh=
125 Q. Find the resistance to be inserted in series with the armature to reduce the
speed to 60% of its original value if the load torque is constant.

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