Problem A 2 pole three-phase induction motor is connected in Y and is fed from a 60 Hz, 208 V (L-L) system. Its equivalent one phase rotor resistance is Rr = 0.1125Q. At what speed and slip is the developed torque 28NM?

Problem A 2 pole three-phase induction motor is connected in Y and is fed from a 60 Hz, 208 V (L-L) system. Its equivalent one phase rotor resistance is Rr = 0.1125Q. At what speed and slip is the developed torque 28NM?

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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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.

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Problem
A 2 pole three-phase induction motor is connected in Y and is
fed from a 60 Hz, 208 V (L-L) system. Its equivalent one phase
rotor resistance is Rr = 0.1125Q. At what speed and slip is the
developed torque 28NM?

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