7-6. A three-phase, 60-Hz, four-pole induction motor runs at a no-load speed of 1790 r/min and a full-load speed of 1720 r/min. Calculate the slip and the electrical fre- quency of the rotor at no-load and full-load conditions. What is the speed regulation of this motor [Equation (4-68)]?

7-6. A three-phase, 60-Hz, four-pole induction motor runs at a no-load speed of 1790 r/min and a full-load speed of 1720 r/min. Calculate the slip and the electrical fre- quency of the rotor at no-load and full-load conditions. What is the speed regulation of this motor [Equation (4-68)]?

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

7-6. A three-phase, 60-Hz, four-pole induction motor runs at a no-load speed of 1790
r/min and a full-load speed of 1720 r/min. Calculate the slip and the electrical fre-
quency of the rotor at no-load and full-load conditions. What is the speed regulation
of this motor [Equation (4-68)]?

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