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A 3 phase, 15 kW, 1750 rpm, Y- connected 460 V, 60 Hz, 4 poles, Y- connected induction motor has the following parameters: Rs=0.4 ohms, Rr = 0.2 ohms, Xs = 0.8 ohms, Xr = 0.8 ohms, Xm = 20 ohms. The no load losses are neglected. The rotor speed is assumed to be constant equal to 1750 rpm. The turn ratio of the rotor to stator winding is n=1. Note that the load torque is proportional to the square of the speed and is assumed to be equal to 99.18 N.m at the speed n= 1500 rpm. If the slip is equal to 0.167, then the slip power losses (across the added resistor) are equal to: a. None of these b. 4250W c. 1768W d. 3116.2W

A 3 phase, 15 kW, 1750 rpm, Y- connected 460 V, 60 Hz, 4 poles, Y- connected induction motor has the following parameters: Rs=0.4 ohms, Rr = 0.2 ohms, Xs = 0.8 ohms, Xr = 0.8 ohms, Xm = 20 ohms. The no load losses are neglected. The rotor speed is assumed to be constant equal to 1750 rpm. The turn ratio of the rotor to stator winding is n=1. Note that the load torque is proportional to the square of the speed and is assumed to be equal to 99.18 N.m at the speed n= 1500 rpm. If the slip is equal to 0.167, then the slip power losses (across the added resistor) are equal to: a. None of these b. 4250W c. 1768W d. 3116.2W

Introductory Circuit Analysis (13th Edition)
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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A 3 phase, 15 kW, 1750 rpm, Y- connected 460 V, 60 Hz, 4 poles, Y- connected induction motor has the following parameters: Rs=0.4 ohms, Rr = 0.2 ohms, Xs = 0.8 ohms, Xr = 0.8 ohms, Xm = 20 ohms. The no load losses are neglected. The rotor speed is assumed to be constant equal to 1750 rpm. The turn ratio of the rotor to stator winding is n=1. Note that the load torque is proportional to the square of the speed and is assumed to be equal to 99.18 N.m at the speed n= 1500 rpm. If the slip is equal to 0.167, then the slip power losses (across the added resistor) are equal to: a. None of these b. 4250W c. 1768W d. 3116.2W
Transcribed Image Text:A 3 phase, 15 kW, 1750 rpm, Y- connected 460 V, 60 Hz, 4 poles, Y- connected induction motor has the following parameters: Rs=0.4 ohms, Rr = 0.2 ohms, Xs = 0.8 ohms, Xr = 0.8 ohms, Xm = 20 ohms. The no load losses are neglected. The rotor speed is assumed to be constant equal to 1750 rpm. The turn ratio of the rotor to stator winding is n=1. Note that the load torque is proportional to the square of the speed and is assumed to be equal to 99.18 N.m at the speed n= 1500 rpm. If the slip is equal to 0.167, then the slip power losses (across the added resistor) are equal to: a. None of these b. 4250W c. 1768W d. 3116.2W
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