three phase induction motor with supply frequency of 60 Hz, 8 poles. If the slip is 2.5 % at a certain load, determine (a) the synchronous speed, (b) the speed of the rotor (c) the frequency of the induced

three phase induction motor with supply frequency of 60 Hz, 8 poles. If the slip is 2.5 % at a certain load, determine (a) the synchronous speed, (b) the speed of the rotor (c) the frequency of the induced

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.

See similar textbooks

Related questions

Q: Q1: A single-phase induction motor is rotating at a speed of 1790 rpm. Its rated nameplate is;…

A: Forward slip=Ns-NrNs. Reverse slip=Ns+NrNs. Where Ns is the sycronous speed Nr is roror speed.

Q: {Q.1} A three-phase induction motor runs at almost 1198 revolutions per minute (rpm) at no load…

Q: Q1/Prove that the power developed by a three-phase induction motor is maximum when the equivalent…

A: The Thevenin equivalent circuit of a 3 phase induction motor can be represented as, now,…

Q: b. Sketch typical torque - speed characteristics for the following classes of Single-Phase Induction…

A: Given following cases of single phase induction motor: Capacitor-Start Induction motor…

Q: (b) A three-phase, 50 Hz, four poles induction motor runs at a no-load speed of 1350 r/min and…

Q: The full-load slip of a 4-pole, 60 Hz, 440 V (line-to-line) three-phase induction motor is 0.05.…

A: Given data, s=0.05f=60 HzP=4VL-L=440 V output = 90 hp at 1732 rpm, Rotational loss = 10,100 W…

Q: Q1 (a) With aid of suitable diagram, explain the losses and power-flow of an induction motor. (b) A…

Q: A 2300-V, 3-phase, wye - connected, round rotor synchronous motor has a synchronous reactance of 3…

Q: A three phase induction motor with supply frequency of 60 Hz, 6 poles. If the slip is 2.5 % at a…

A: (a) The synchronous speed of the three-phase induction motor is given by the expression as shown…

Q: A three-phase induction motor used for a commercial application in Oman runs at 586 rpm at no load…

Q: Q.2 a) Explain requirement of V/f control method of the induction motor for the below and above the…

Q: EXAMPLE 4.3. A 3-phase, 6-pole, 50 Hz induction motor has a slip of 1% at no load, and 3% at full…

Q: A three phase induction motor with supply frequency of 60 Hz , 6 poles. If the slip is 5 % at a…

Q: The full-load slip of 4-pole,60Hz,440v

Q: A three-phase induction motor used for a commercial application in Oman runs at 586 rpm at no load…

A: Given Data N = 586 full load speed = 546 oman frequency = 50 Hz

Q: 22- With neat diagram explain slip ring rotor of 3-phase induction motor. Also draw and explain the…

A: Slip ring rotor of 3-phase induction motor :- The rotor of this motor consists of a cylindrical…

Q: Q1: A single-phase induction motor is rotating at a speed of 1790 rated nameplate is; 150-V, 60-Hz,…

A: Let Ns be synchronous speed =120×604=1800 rpm Nr be rotor speed =1790 We will use fallowing formulae…

Q: This question refers to a three-phase induction motor. which statement are false (A) The slip speed…

A: According to question:

Q: Explain the difference between single phase and three phase induction motors with their application…

A: Explain the difference between single phase and three phase induction motors with their application…

Q: QI Prove that the power developed by a three-phase induction motor is maximum when the equivalent…

Q: The amount of torque developed by a 3-phase squirrel-cage induction motor from no-load to rated-load…

A: A simple question on electrical machines shbject . I provided the detailed solution for the same.…

Q: E-1). The amount of torque developed by a 3-phase squirrel-cage induction motor from no-load to…

A: There are three descriptions are given about the induction motor.

Q: A three-phase induction motor operating from a power supply of constant frequency can be used to…

A: Three phase induction motor is convert electromechanical energy and rotor current induced a magnetic…

Q: How to reduce eddy current losses produced in a three phase induction motor? O a. All given choices…

A: The hyterisis loss and the eddy current loss are present is in three-phase induction motor. it is…

Q: Q17. What will be the locked rotor torque developed at unity machine constant by single phase…

A: Given, Zm =1.5+j2.5Za =8+j8so,Im =1201.5+j2.5=41.60∠-59.03oIa =1208+j8=10.60∠-45o

Q: a) Why the slip of induction motor is never zero, b) What happens if the slip of induction motor is…

A: (a) Slip of induction motor will be zero ,if speed of rotor is equal to synchronous speed. For slip…

Q: Q1: A single-phase induction motor is rotating at a speed of 1790 rpm. Its rated nameplate is;…

Q: A single-phase induction motor with a 4-pole, 50-Hz, 130-V, is rotating in the clockwise direction…

A: Single phase induction motor have 4 pole, 50Hz frequency, Rotor speed N= 1450rpm Determine the per…

Q: Q2 i) Explain with sketch the working of the three phase slip ring Induction Motor with a special…

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…

Q: Explain torque speed/torque slip characteristics of 3 phase induction motor

A: Gives details about difference of torque and slip The ratio of difference of synchronous speed Ns…

Q: a) In the cage structure rotors, in which mechanism are the bar conductors short- circuited? b) How…

A: The induction motor is available in two types,1. squirrel cage induction motor.2. wound rotor…

Q: ii) Analyse the superiority of the V/f method of speed control for three phase Induction Motor With…

A: The induction machine for the variable speed applications, especially the cage rotor type, is mostly…

Q: 5. (a) What would be the effect on the speed-torque characteristics of an induction motor produced…

A: (a) The torque developed in the induction motor is directly proportional to the square of the supply…

Q: The rotor of a 50 Hz, 4 pole synchronous motor is directly coupled to rotor of 50 Hz, 6 pole…

A: Given- 50 Hz, 4 pole synchronous motor, 50 Hz, 6 pole induction motor. To Find- The value of a…

Q: question A single-phase induction motor with a 4-pole, 50-Hz, 130-V, is rotating in the clockwise…

A: per unit slip in forward direction is Ns-NrNs. per unit slip in backward direction is Ns+NrNs.…

Q: 14) the difference between internal generated voltage and output voltage in synchronous generator…

A: As per guidelines given to us,we can only provide the solution of first question in multiple type of…

Q: A three-phase induction motor used for a commercial application in Oman runs at 580 rpm at no load…

A: Given: A three phase induction motor No load speed = 580 rpm Speed at full load = 552 rpm To…

Q: Problem 1 The rotor resistance and reactance of a squirrel-cage induction motor rotor at standstill…

A: (a) Write the expression for the value of the slip of the motor at the start. As rotor speed is…

Q: d) What measures can be taken to reduce Eddy losses? e) How does the starting torque change if the…

A: Eddy current losses are generally seen in transformers

Q: See attached.

A: The given points for three-phase induction motor:

Q: Q2: A single-phase induction motor with a 4-pole, 50-Hz, 130-V, is rotating in the clockwise…

A: Slip=Ns-NrNs. Nr is rotor speed Ns is sycronous speed of rotating magnetic field. Forward slip is…

Q: Q2: A single-phase induction motor with a 4-pole, 50-Hz, 130-V, is rotating in the clockwise…

A: Slip of Induction motor is sycronous speed-rotor speedsycronous speed Forward branch resistance…

Q: 22. A) Why is the power factor of a lightly loaded 3-phase squirrel-cage induction motor very low?…

A: A. the power factor of a lightly loaded 3-phase squirrel-cage induction motor very low

Q: Select the answer Questions: 1. Synchronous motor for power factor correction operates at a. No…

A: 1 we know that synchronous motor acts as synchronous condensor under over excited…

Q: Three phase induction motor Leakage Reactance five times Resistance for stator and rotor and…

A: Three phase induction motor Leakage Reactance five times Resistance for stator and rotor and…

Q: A three-phase induction motor used for a commercial application in Oman 50HZ runs at 584 rpm at no…

A: No-load speed = 584 rpm Full load speed = 546

Q: 1. The rotor resistance and reactance per phase of a three-phase wound rotor induction motor are…

A: In this question induction motor is given....We have to find out full load speed , speed at maximum…

Q: Indicate the relevant changes in induction motor performance (output power, speed, efficiency, power…

A: We are authorized to answer three subparts at a time.Since you have not mentioned which part you are…

Q: Q.14. What is slip in an induction motor? Q.15. What is the value of slip at start in an induction…

A: Solution: (14) In INduction Motor sleep is defined as the ratio of the difference in synchronous and…

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 three phase induction motor with supply frequency of 60 Hz, 8 poles. If the slip is 2.5 % at a certain load, determine (a) the synchronous speed, (b) the speed of the rotor (c) the frequency of the induced e.m.f in he rotor and (d) speed of the induction motor if the slip changes to 6 %

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.

Similar questions

Would a positive-rotating harmonic or a negative-rotating harmonic be more harmful to an induction motor? Explain your answer.
{Q.1} A three-phase induction motor runs at almost 1198 revolutions per minute (rpm) at no load and 1112 rpm at full load when supplied from a 60-Hz, three-phase source. (a) How many poles does this motor have? (b) What is the slip in percent at full load? (C) What is the corresponding frequency of the rotor currents? (D) What is the corresponding speed of the rotor field with respect to the rotor and with respect to the stator?
A three-phase induction motor used for a commercial application in Oman runs at 586 rpm at no load and at 546 rpm at full load. a) How many poles do this motor have? b) What is the percentage slip at full load? c) The frequency of the rotor currents when slip is 7 % d) The frequency of the rotor currents at standstill.
A three-phase induction motor, operating at rated voltage and frequency, has a startingtorque of 1.35 times and a maximum torque of 2.2 times, both with respect to its rated-loadtorque. Ignoring the effects of the stator resistance and rotational losses and assumingconstant rotor resistance, determine the slip rated load, and the rotor current at starting (as a percentage of the rotor current at rated load). The slip at maximum torque is 0.343 if that helps.
Design and develop equivalent circuit model of a single phase Induction motor with th consideration of core losses present with the parameter consideration of stator resistance R1 and reactance X1 and two rotor parameters which includes r2,x2 and magnetising reactance xm. (Illustration is required) Draw by hand please
A 6-pole, 50-Hz squirrel-cage induction motor runs on the load at a shaft speed of970 rpm. Calculate a) the percentage slip and b) the frequency of the inducedcurrent in the rotor.
Select the answer Questions: 1. Synchronous motor for power factor correction operates at a. No load with over-excited fields b. No load with under-excited fields c. Normal load with minimum excitation d. Normal load with zero excitation 2. What happens if field winding of the synchronous motor is short circuited? a. First, starts as induction motor then run as synchronous motor b. Not start c. Motor will burn out d. Run as induction motor e. Other: (specify)
A three-phase induction motor is supplied with power from a 60-Hz source. At full load the motor speedis 1728 rpm, and at no load the speed is nearly 1800 rpm. At full-load conditions, determine thefollowing: 1. speed of rotor field wih respect to the rotor 2. speed of rotor field with respect to the stator 3. speed of rotor field with respect to the stator field.
A three-phase 60 Hz induction motor connected to a three-phase bus at rated voltage isoperating at a low slip condition (i.e s < 20%) resulting in a steady state speed of 1090 rpm.(a) How many poles does the motor have?(b) What is the percentage slip at the operating speed?(c) What is the corresponding frequency, (fr) of the currents and voltages induced in therotor winding?
14 P.14 - A three-phase induction motor with 4 magnetic poles, 60 Hz, rotates with a speed of n=1750 rpm In order to achieve a quick stop we can use a proper swap of 2 phases which normally corresponds to an inversion of rotation direction. For fast crossing, the technique of inversion of the direction of rotation by changing 2 phases is used. At the precise moment we swap the 2 phases, what are the slip, s, and the rotor current frequency, fR, like?
A star-connected 3-phase synchronous motor operates at a frequency of 50 Hz and a line voltage of 380 V and serves a load of 20 kW at a single load factor of 0.8. The field winding has 4 poles. If the synchronous reactance of the motor is 1 Ohm and the armature resistance is neglected determine: a. Difference between synchronous motor and induction motor b. induced voltage in the armature and torque angle of the motor c. motor speed if motor load is reduced to 5 kW
1.why the slip of induction motor is never zero, 2.what happens if the slip of induction motor is one, 3.what is the value of the slip for an induction motor at on load and full load