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A three phase, 8 poles induction motor is excited by 60 Hz three phase source. At rated load and speed, the induction motor runs at 870 rpm and absorb 100kW power from the three phase AC input. The kinetic energy of all revolving parts is 300kJ at rated load and speed. 1. Calculate the slip of the motor at the rated speed. 2. If the voltage induced at rotor bar is 10V when the rotor is locked, what is the voltage induced at rotor bar when the motor has 5% slip? 3. If the winding and iron loss from stator of the motor is 5kW, what is the I^2R loss at rated load and speed? 4. if Plugging is applied to stop the induction motor, how much energy (in Joule) dissipated in the rotor circuit during this process?

A three phase, 8 poles induction motor is excited by 60 Hz three phase source. At rated load and speed, the induction motor runs at 870 rpm and absorb 100kW power from the three phase AC input. The kinetic energy of all revolving parts is 300kJ at rated load and speed. 1. Calculate the slip of the motor at the rated speed. 2. If the voltage induced at rotor bar is 10V when the rotor is locked, what is the voltage induced at rotor bar when the motor has 5% slip? 3. If the winding and iron loss from stator of the motor is 5kW, what is the I^2R loss at rated load and speed? 4. if Plugging is applied to stop the induction motor, how much energy (in Joule) dissipated in the rotor circuit during this process?

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 three phase, 8 poles induction motor is excited by 60 Hz three phase source. At rated load and speed, the induction motor runs at 870 rpm and absorb 100kW power from the three phase AC input. The kinetic energy of all revolving parts is 300kJ at rated load and speed. 1. Calculate the slip of the motor at the rated speed. 2. If the voltage induced at rotor bar is 10V when the rotor is locked, what is the voltage induced at rotor bar when the motor has 5% slip? 3. If the winding and iron loss from stator of the motor is 5kW, what is the I^2R loss at rated load and speed? 4. if Plugging is applied to stop the induction motor, how much energy (in Joule) dissipated in the rotor circuit during this process?
Transcribed Image Text:A three phase, 8 poles induction motor is excited by 60 Hz three phase source. At rated load and speed, the induction motor runs at 870 rpm and absorb 100kW power from the three phase AC input. The kinetic energy of all revolving parts is 300kJ at rated load and speed. 1. Calculate the slip of the motor at the rated speed. 2. If the voltage induced at rotor bar is 10V when the rotor is locked, what is the voltage induced at rotor bar when the motor has 5% slip? 3. If the winding and iron loss from stator of the motor is 5kW, what is the I^2R loss at rated load and speed? 4. if Plugging is applied to stop the induction motor, how much energy (in Joule) dissipated in the rotor circuit during this process?
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