G1-2G2-4G3-2G4-7G5-2G6-1G7-2 04 (a) Indicate the relevant changes in induction motor performance (output power,speed, efficiency, power factor etc.) to the following changes in operation ormotor characteristics:(i) An increase in the supply frequency.(ii) An increase in the rotor resistance.(iii) An increase in the iron loss resistance.(v)An increase in the leakage reactance.Parameter ValueUnitsХм12Re44R.Xe100mf2800R.82Table Q4bA 3 phase 4 pole star connected induction machine operates from a 2G-0 V(phase voltage) and 5G4 Hz supply. Given the equivalent circuit parametersshown in Table Q4b, and assuming the friction and windage loss isnegligible, calculate the following parameters when operating at a slip of0.03:(b)The actual motor speed (rpm).(i)(ii)(iii)(iv)(v)The mechanical power (W).The torque (Nm).The efficiency (%).The no load current (A).SpecificationValueUnitsFull Load slip0.025Stator Copper Loss = Rotor Copper loss = Iron Loss| 1.90.325No Load CurrentANo Load Power FactorTable Q4cA hoist manufacturer requires a 6 pole 3 phase induction motor to meet thespecification outlined in Table Q4c when operation from a phase voltage ofIG:0 V and supply frequency 6Gs Hz.(c)(i) Neglecting leakage reactance and friction and windage loss determinethe required per phase equivalent circuit values to meet theserequirements(ii)Calculate the mechanical power when operating at full load.

Since you have asked more than one question, I will answer the first question and all its subparts.…

Answered: Indicate the relevant changes in…

Indicate the relevant changes in induction motor performance (output power, speed, efficiency, power factor etc.) to the following changes in operation or motor characteristics:

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...

See similar textbooks

Related questions

Q: a) What is the operating principle of induction motor? b) Differentiate between induction motor and…

A: Induction motor works on the principle of Faraday's law of Electromagnetic Induction. Operating…

Q: Which of the following option is correct for 3-phase induction motor drive? O a. Only voltage is…

A: In this question we will see indictor motor speed control above rated speed...

Q: Q1) Under what condition will an induction motor work as an induction generator?

A: In this question, we will describe how induction motor will work as an induction generator..

Q: The power input to a 500V, 50Hz, 6 pole, 3 phase squirrel cage induction motor running at 975 RPM is…

Q: H.W/ Draw and Explain Power flow diagram for an induction motor

A: Power flow diagrams help us to understand how power is flowing within an electromechanical device.…

Q: What are the various losses in an Induction motor? On what factors do they depend?

A: the fallowing are the various losses that occur in induction motor:

Q: 6.36 A 440 V, 3-phase, 50 Hz, 6-pole, 945 rpm, delta connected induction motor has following…

Q: A 20kW, 4-pole induction motor is designed to operate from a 440V, 50Hz, three-phase supply, and…

Q: What is the effect of load on the efficiencY of an induction motor?

A: the effect of load on efficiency of an induction motor is as fallows:

Q: PASSAGE Choose the correct option.(Marksc) Evaluate the no load speed at sip Assuming ari induction…

A: Given:Induction motorf=50 HzP=6s=3% or.03

Q: How can we calculate the speed of the induction motor provided that the induction motor drive keeps…

A: Speed Control of IM There are many methods to control the speed of IM. Variable Voltage Control…

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: 1. What is the effect of the Y/ DELTA stator connection in an induction motor motor?

A: In this question we need to anst what is the effect of the star/ DELTA stator connection in an…

Q: The operating region of an induction motor is split into 3, namely low slip, medium slip and high…

A: The rotor frequency (fr) = slip (s) times the supply frequency (f) fr = s f

Q: 2. What is the speed of an induction motor of six poles at 60 HZ, if the percent slip is 2.5 %?

Q: in Three Phase Induction Motor Load Test , Plot the relationship between the current and all the…

A: 3-phase Induction Motor- When a three-phase stator displaced by 120 degrees (in the space of 120…

Q: amount of power that the motor produces.

A: Three Phase Induction machine- This Induction machine comprises of rotor and stator as it basic…

Q: Consider a 3-phase, 4 Pole, AC induction motor being driven at 75 Hz. Initially, the motor is…

A: Given, number of poles P= 4 frequency f= 75 HzSynchronous speed Ns = 120×fPNs=120×754Ns=2250 rpm

Q: Discuss the ratios of no load current, and starting current of three phase induction motor to its…

A: The explanation and answer are as follows.

Q: A three-phase induction motor is rated at 5 hp, 1760 rpm, with a line-to-line voltage of 220 Vrms.…

A: Speed regulation is independent of motor rating and voltage The only things needed are no load and…

Q: what is the synchronous speed (rpm) given a six-pole induction motor with 40 cycles/second?

A: In this question we need to find a synchronous speed of the given induction motor.

Q: d) Explain the difference between locked motor torque and the pull up torque of an induction motor.…

A: Locked rotor torque : The torque generated by an electrical motor, when it begins at rest or zero…

Q: What do you mean by circle diagram of a 3-phase induction motor? Answer the following: What is its…

A: Circle diagram of induction motor The complete performance of induction motor can be obtained by…

Q: Draw the equivalent circuit of Induction motor and explain its different parameters.

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

A: To know how the power flow in the case of an induction machine we need to draw power flow diagram.…

Q: List five important specifications to be considered (besides cost) in selecting induction motors.…

A: Concept: An electrical machine that converts electrical energy into mechanical energy which is…

Q: Explain in detail the Starting of Induction Motors

Q: Outline the locked rotor and no load tests for an induction motor

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: c) What is the physical meaning for each of the following induction motor parameters: R1 „R2 ,Rc ,X1…

Q: induction

Q: Question 3 Explain in detail the Starting of Induction Motors

A: According to question we have to explain in detail the starting of Induction Motors.

Q: a) Briefly explain basic operating principle of an induction motor.

A: In this question we will write working principle of induction motor....

Q: Q4) discuss two of the following:- a) principle operation of (1Ø induction motor)? b) why is the…

A: The 1-φ induction motor are also called as Fractional horse power or fractional kilo watt motor.…

Q: What is the effect of load on the efficiency of an induction motor?

A: The explanation is as follows.

Q: What type of DC motor would you prefer to be used in future coming electric vehicles? Give…

A: Electric vehicles are very useful to control the pollution for survival of future generation. The…

Q: Stator Voltage Control of an Induction Motor using PWM The objective: The objective of this…

A: The speed control of an induction motor can be achieved by various methods. The used methods majorly…

Q: What is the reason of the high starting current in the 3-phase induction motor? Explain in short.

A: Solution: The approximated equivalent circuit of the three-phase induction motor is, From the…

Q: f. An induction motor is running at the rated conditions. If the shaft load is now increased, how do…

A: If the shaft load of the induction motor is increased then how other quantities change ?

Q: 1.) Why are the rotor rods of squirrel cage induction motor placed in a crosswise manner? 2.) What…

A: The rotor bars of the squirrel cage induction motor is skewed because of the various advantages.

Q: Q4 (a) Indicate the relevant changes in induction motor performance (eg output power, forque,…

A: According to the question we have to discuss all the given conditions.

Q: Question 3:7 Discuss improvements that could be made to both motors. *Discuss improvements that…

A: An electric motor (sometimes known as the electrical motor) is a mechanism that transforms…

Q: An induction motor that was running at 5OHZ in Jordan shows a no-load speed of 1500rpm. If this…

A: Given: AN induction motor with N1=1500 rpmf1=50 Hzf2=60 Hz

Q: A 3-phase 400 V, 50 Hz, 6-pole star connected induction motor develops maximum torque at a speed of…

A: Given a 3-phase induction motor having, Number of poles, P= 6 Frequency, f= 50 Hz Speed at maximum…

Q: I. What is the effect of load on the efficiency of an induction motor?

A: Effect of load on the efficiency of induction motor: efficiency of motor is defined as the ratio of…

Q: Define the working of the Three phase induction motor with the properly labelled diagrams

A: Three Phase induction motor is a widely used machine for any industrial and domestic purposes. it is…

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: (1) Explain why induction motors are preferred for industrial use. (2) Explain the principle of an…

A: "Since you have asked multiple questions, we will solve the first question for you. If you want any…

Concept explainers

Synchronous Generator

In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.

Salient Pole Rotor

Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.

Question

G1-2 G2-4 G3-2 G4-7 G5-2 G6-1 G7-2

04 (a) Indicate the relevant changes in induction motor performance (output power,
speed, efficiency, power factor etc.) to the following changes in operation or
motor characteristics:
(i) An increase in the supply frequency.
(ii) An increase in the rotor resistance.
(iii) An increase in the iron loss resistance.
(v)
An increase in the leakage reactance.
Parameter Value
Units
Хм
12
Re
44
R.
Xe
100
mf2
800
R.
82
Table Q4b
A 3 phase 4 pole star connected induction machine operates from a 2G-0 V
(phase voltage) and 5G4 Hz supply. Given the equivalent circuit parameters
shown in Table Q4b, and assuming the friction and windage loss is
negligible, calculate the following parameters when operating at a slip of
0.03:
(b)
The actual motor speed (rpm).
(i)
(ii)
(iii)
(iv)
(v)
The mechanical power (W).
The torque (Nm).
The efficiency (%).
The no load current (A).
Specification
Value
Units
Full Load slip
0.025
Stator Copper Loss = Rotor Copper loss = Iron Loss
| 1.9
0.325
No Load Current
A
No Load Power Factor
Table Q4c
A hoist manufacturer requires a 6 pole 3 phase induction motor to meet the
specification outlined in Table Q4c when operation from a phase voltage of
IG:0 V and supply frequency 6Gs Hz.
(c)
(i) Neglecting leakage reactance and friction and windage loss determine
the required per phase equivalent circuit values to meet these
requirements
(ii)
Calculate the mechanical power when operating at full load.

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

Step 2

Step 3

Step 4

Step 5

Step 6

Step by step

Solved in 6 steps

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

The full-load slip of 4-pole,60Hz,440v (line -to-line) three phase induction motor is 0.05. i.What is the speed of the rotating stator field?What is the frequencey (in Hz) of the rotor current. ii.When the output power of the motor is 90 hp at a speed of 1732rpm,rotational losses(which includes frictional and core losses) are 10,100W,while copper losses for both rotor and stator total 3700W.Determine the motor efficiency and line current,assuming the motor has a 0.8 pf lagging under these conditions.
The full load slip of a 4-pole, 60Hz, 440V (line-to-line) three phase induction motor is 0.05. (i). What is the speed of the rotating stating? What is the frequency (in Hz) of the rotor current? (ii). When the output power of the motor is 90 hp at a speed of 1732 rmp, rotational losses (which include frictional and core losses) are 10,100W, while copper losses for both the rotor and stator total 3700W. Determine the motor efficiency and line current, assuming the motor has a 0.8pf lagging under the conditions.
base on below mentioned Comparison of the performance indexes discuss and advice best induction motor.
In one or two paragraphs, describe the construction and principles of operation for a sixpole 60-Hz three-phase synchronous motor.
B. What are differences in term of construction and working principle between Shaded Pole Induction Motor and Capacitor Start Induction Motor?
A three-phase, Y-connected, 220 V, 5 kVA, salient-pole synchronous generator is employed to supply power to a load with unitary fp. By means of a slip test, the direct-axis synchronous reactance is determined to be 12 Ω and the quadrature-axis synchronous reactance, 7 Ω. Consider that the rated current is delivered to the load at the rated voltage and that the armature resistance is negligible. (a) Calculate the corresponding value of the excitation voltage. (b) What is the value of the internal phase shift angle? (c) What is the value of the power angle?
What are the Induction motor Performance Parameters?
(b) A three phase, 5-hp, 60Hz, 115V, 4-pole induction motor is operating at rated voltage, rated frequency, and 125 percent rated load has an efficiency of 85.4 percent. The stator conductor loss, rotor copper loss and core loss are 223.2W, 153W, and 114.8W respectively. Sketch the power flow diagram, enter the given data, and determine i) shaft speed ii) shaft torque
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 at the maximum torque;
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.
2-Could you give examples where fast breaking of induction motor is required?
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