A 241-V shunt motor has an armature resistance of 0.4 ohm and a field resistance of 100 ohm. At no-load the motor takes armature current of 7A while running at 1239 rpm. If the armature current at full-load is 58 A, what is the full- load speed in rpm? Answer:

A 241-V shunt motor has an armature resistance of 0.4 ohm and a field resistance of 100 ohm. At no-load the motor takes armature current of 7A while running at 1239 rpm. If the armature current at full-load is 58 A, what is the full- load speed in rpm? Answer:

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 19RQ: Why is the starting torque per A of starting current of a wound-rotor motor higher than that of a...

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Concept explainers

Single Phase Induction Motor

The single-phase induction motor or engine consists of a single rotating phase in the stator and a rotating cage in the rotor. When phase one supply is connected to the stator winding, a magnetic field is generated. In the pulsating field, the rotor does not rotate due to inertia. So, a single-phase import motor does not start and requires some initial methods.

Question

A 241-V shunt motor has an armature resistance of 0.4 ohm and a field resistance of 100 ohm. At no-load the motor
takes armature current of 7A while running at 1239 rpm. If the armature current at full-load is 58 A, what is the full-
load speed in rpm?
Answer:

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