Running at 1200 rpm from a 280-V source, a series-connected dc motor draws an armature current of 25 A. The field resistance is 0.2 Ω and the armature resistance is 0.3 Ω. Assuming that the flux is proportional to the field current, determine the speed at which the armature current is 10 A.

Running at 1200 rpm from a 280-V source, a series-connected dc motor draws an armature current of 25 A. The field resistance is 0.2 Ω and the armature resistance is 0.3 Ω. Assuming that the flux is proportional to the field current, determine the speed at which the armature current is 10 A.

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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Concept explainers

Three Phase Induction Motor

The induction motor is an electric motor that runs on AC (alternating current) and it is of two type single phase motor that work on single-phase power supply and three-phase motor that work on three-phase power supply.

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Running at 1200 rpm from a 280-V source, a series-connected dc motor draws an armature current of 25 A. The field resistance is 0.2 Ω and the armature resistance is 0.3 Ω.
Assuming that the flux is proportional to the field current, determine the speed at which the armature current is 10 A.

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