A 3 phase, 50 Hz, 6 pole induction motor has a full load slip of 8 %. The Totor resistance is 0.005 S2/ph and the standstill reactance 0.008/ph. Find the ratio of maximum to full load torque the speed at which the maximum torque occurs.

A 3 phase, 50 Hz, 6 pole induction motor has a full load slip of 8 %. The Totor resistance is 0.005 S2/ph and the standstill reactance 0.008/ph. Find the ratio of maximum to full load torque the speed at which the maximum torque occurs.

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.

Question

A 3 phase, 50 Hz, 6 pole induction motor has a full load
slip of 8 %. The Totor resistance is 0.005 S2/ph and the
standstill reactance 0.008/ph.
Find
the ratio of maximum to full load torque
the speed at which the maximum torque occurs.

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