Q5//Answer for the following question: 1- Can we get maximum torque at start in an induction motor, how? Which type of motor develops higher starting torque? 2- Sketch the torque slip characteristic of single phase induction motor Why the value of starting torque is equal to zero. 3- Classify 3-phase induction motors on the basis of their construction. Which one is generally preferred and why? 4- What are the factors on which speed of an induction motor depends? 5- Derive the condition for maximum torque in a 3-phase induction motor under normal operation, and then find the maximum torque equation.

Q5//Answer for the following question: 1- Can we get maximum torque at start in an induction motor, how? Which type of motor develops higher starting torque? 2- Sketch the torque slip characteristic of single phase induction motor Why the value of starting torque is equal to zero. 3- Classify 3-phase induction motors on the basis of their construction. Which one is generally preferred and why? 4- What are the factors on which speed of an induction motor depends? 5- Derive the condition for maximum torque in a 3-phase induction motor under normal operation, and then find the maximum torque equation.

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter35: Harmonics 916

Section: Chapter Questions

Problem 3RQ: Would a positive-rotating harmonic or a negative-rotating harmonic be more harmful to an induction...

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Similar questions

Would a positive-rotating harmonic or a negative-rotating harmonic be more harmful to an induction motor? Explain your answer.
Torque-speed characteristics for three phase induction motor 4. Discuss the following (rated torque, starting torque, break down torque).
What are the various losses in an induction motor? On what factors do they depend? IV. V. List the different types of stray load losses in an induction motor.
5. (a) What would be the effect on the speed-torque characteristics of an induction motor produced by: (i) halving the applied voltage with normal frequency (ii) halving both the applied voltage and frequency Also, draw and explain the speed- torque characteristics of three phase induction motor.6
Q.14. What is slip in an induction motor? Q.15. What is the value of slip at start in an induction motor?
B/ Fill in the blanks: TV ezur 1- In a three-phase induction motor iron losses in stator will be..... that in rotor. 2- In three-phase induction motors sometimes copper bars are placed deep in the rotor to........... 3- Blocked rotor test on induction motors is used to find out. R..., ke, X. 4- The maximum torque in an induction motor depends on .............and .....
What is a single - phase induction motor? How does a single- phase induction motor work? How do you test a single phase motor? Which capacitor is used in single phase motor? What are the advantages of single phase induction motor? What are the applications of single phase induction motor? How does an induction motor start? What are the differences between single and three phase I.M ? What are the types of induction motor? What is the difference between induction motor and normal motor? Why three-phase induction motor self start while single phase motor does not self start?
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
1. What is the formula for torque production in a single-phase induction motor? Draw a vector diagram for capacitor start single-phase induction motor.2. Which type of starter is popular for using in induction motor and why?
g) What is an advantage if the starting Torque of the induction motor is higher than the nominal load Torque? h) What are the main differences when the equivalent circuits of transformer and asynchronous motor are examined?
Q3) Mention Methods of starting of three phase induction motors and Single phase motors Discuss with Drawing only one of them ?
Derive the torque equation for a three phase induction motor, with the help of torque speed characteristics curve briefly explain how an induction motor can operate in stable region.