[Q4 A] A 3 phase, 440v, 1740 rpm, 60Hz, 4-pole, SRIM. has the following parametersper phase: R₁-0.250, R₂e=0.202, X₁-X2e=0.5, Xm-302, the rotational losses are1700W, with the motor terminals short circuited. Find: Starting torque. Motor efficiencyn

The given information about a 3-phase, SRIM is shown below.Stator supply voltage is V1=440 Volts…

[Q4 A] A 3 phase, 440v, 1740 rpm, 60Hz, 4-pole, SRIM. has the following parameters per phase: R₁-0.252, Rze-0.20, X₁-X2e-0.502, Xm-3052, the rotational losses are 1700W, with the motor terminals short circuited. Find: Starting torque. Motor efficiency

[Q4 A] A 3 phase, 440v, 1740 rpm, 60Hz, 4-pole, SRIM. has the following parameters per phase: R₁-0.252, Rze-0.20, X₁-X2e-0.502, Xm-3052, the rotational losses are 1700W, with the motor terminals short circuited. Find: Starting torque. Motor efficiency

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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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

[Q4 A] A 3 phase, 440v, 1740 rpm, 60Hz, 4-pole, SRIM. has the following parameters
per phase: R₁-0.250, R₂e=0.202, X₁-X2e=0.5, Xm-302, the rotational losses are
1700W, with the motor terminals short circuited. Find: Starting torque. Motor efficiency
n

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Step 2: Drawing the equivalent circuit and simplifying the circuit.

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Step 3: Calculating synchronous speed and slip at the time of starting.

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Step 4: Calculating the starting torque.

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Step 5: Calculating the full-load efficiency.

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[Q4 A] A 3 phase, 440v, 1740 rpm, 60Hz, 4-pole, SRIM. has the following parameters -Per phase: R₁=0.250, R₂e=0.20, X₁-X2e-0.50, X-300, the rotational losses are 1700W, with the motor terminals short circuited. Find: Starting torque. Motor efficiency at full load