The no-load current of a 75KW, 4000v, 3-phase, 900rpm, 60HZ induction motor is one-thirdand starting current is six times the full-load current. Calculate (i) the approximate values offull-load current, starting current, and no-load current (ii) the output torque, synchronousspeed, and rotor power (air gap power) given that slip is 2%.

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Engineering

Electrical Engineering

The no-load current of a 75KW, 4000V, 3-phase, 900rpm, 60HZ indı

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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Single Phase AC Circuit

Alternating Current (AC) is a type of electric power in which the electric current changes, both in magnitude and direction, at regular intervals. This AC Circuits can deliver power in either a Single Phase system or a Three Phase system.

Question

The no-load current of a 75KW, 4000v, 3-phase, 900rpm, 60HZ induction motor is one-third
and starting current is six times the full-load current. Calculate (i) the approximate values of
full-load current, starting current, and no-load current (ii) the output torque, synchronous
speed, and rotor power (air gap power) given that slip is 2%.

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