A 4-pole, 3 phase, 400 V, 50 Hz, 1470 rpm induction motorhas a rated torque of 30 Nm. The motor is used to drive alinear load with characteristic given by T = Ko, such thatthe speed equals rated value at rated torque. If a constantVolts/Hz control method is employed, calculate:• The constant K in the T -w characteristic of the load.Synchronous and motor speeds at 0.6 rated torque.• If a starting torque of 1.2 times rated torque is required, what should be thevoltage and frequency applied at start-up? State any assumptions made forthis calculation.

Given:rated torque = 30Nm4-pole , 3-ϕ, 400V, 50Hz , 1470rpmLinear load = Kwi)Trated torque =…

A 4-pole, 3 phase, 400 V, 50 Hz, 1470 rpm induction motor has a rated torque of 30 Nm. The motor is used to drive a linear load with characteristic given by T = Km, such that the speed equals rated value at rated torque. If a constant Volts/Hz control method is employed, calculate: • The constant K in the T1 -w characteristic of the load. Synchronous and motor speeds at 0.6 rated torque. • If a starting torque of 1.2 times rated torque is required, what should be the voltage and frequency applied at start-up? State any assumptions made for this calculation.

A 4-pole, 3 phase, 400 V, 50 Hz, 1470 rpm induction motor has a rated torque of 30 Nm. The motor is used to drive a linear load with characteristic given by T = Km, such that the speed equals rated value at rated torque. If a constant Volts/Hz control method is employed, calculate: • The constant K in the T1 -w characteristic of the load. Synchronous and motor speeds at 0.6 rated torque. • If a starting torque of 1.2 times rated torque is required, what should be the voltage and frequency applied at start-up? State any assumptions made for this calculation.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Concept explainers

Three Phase Induction Motor

The induction motor is an electric motor that runs on AC (alternating current) and it is of two type single phase motor that work on single-phase power supply and three-phase motor that work on three-phase power supply.

Question

A 4-pole, 3 phase, 400 V, 50 Hz, 1470 rpm induction motor
has a rated torque of 30 Nm. The motor is used to drive a
linear load with characteristic given by T = Ko, such that
the speed equals rated value at rated torque. If a constant
Volts/Hz control method is employed, calculate:
• The constant K in the T -w characteristic of the load.
Synchronous and motor speeds at 0.6 rated torque.
• If a starting torque of 1.2 times rated torque is required, what should be the
voltage and frequency applied at start-up? State any assumptions made for
this calculation.

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