UrbanPro
Login Ask & Answer Success Stories Paid Courses Free Classes Tuition & Classes Fees Write a Review All Categories Help Center
Post your Learning Need Signup as a Tutor
✕

Popular Cities

Bangalore

Hyderabad

Delhi

Mumbai

Chennai

Pune

Kolkata

Gurgaon

Ahmedabad

Jaipur

Noida

✕

Take BTech Tuition from the Best Tutors

  • Affordable fees
  • 1-1 or Group class
  • Flexible Timings
  • Verified Tutors

Book a Free Demo

BTech Tuition > Learn BTech Tuition > In ac machines, why is the stator winding for phase-b...
✕

Search in

In ac machines, why is the stator winding for phase-b placed 120 degree ahead of phase-a whereas the phasors for phase-b (such as Vb) lag behind the corresponding phasors for phase-a ?

Asked by Last Modified  

8 Answers

Learn BTech Tuition

Follow 0
Answer

Please enter your answer

electrical

Dear fairooz, I don't now with reference to what u are asking. in case of generator, rotor rotates and as the field windings are on rotor, field is said to be rotating or rotating magnetic field. since the flux cuts the stationary conductors emf is induced in the stationary windings.and...
read more
Dear fairooz, I don't now with reference to what u are asking. in case of generator, rotor rotates and as the field windings are on rotor, field is said to be rotating or rotating magnetic field. since the flux cuts the stationary conductors emf is induced in the stationary windings.and emf phase sequence depends on how 3 phase windings are placed.if they are 120 degree apart then only it satisfies a 3 phase system otherwise it is not.leading or lagging of phasors depend on field rotation (if field is rotating) .in case of synchronus motor if we give 3 phase balanced supply rmf produced in stator if and only iff windinds are pl aced in 120 apart otherwise not.stator field is now rotating but rotor flux is stationary.so no motion of rotor in synchronus motor. read less
Comments
Dislike Bookmark

I have very good subject knowledge in all the electrical subjects..i can cover to gate level.. And i can teach mathematics and java too.

Basic concept in polypahse AC machine is to generate RMF. The rmf can be developed in any machine except single pahse machine . if you increase the no of pahses strength of the rmf will increase but there more advantage if you use for 3 phase system instead of 2phase system.. As compared to other ez...
read more
Basic concept in polypahse AC machine is to generate RMF. The rmf can be developed in any machine except single pahse machine . if you increase the no of pahses strength of the rmf will increase but there more advantage if you use for 3 phase system instead of 2phase system.. As compared to other ez 4,5 phase system strength of rmf increase but very less value .. That requires details derivation... The steangth of rmf decides the stator rmf which will incfluence the rotor rmf ie speed of rotor .. So from the advantage of 3 phase system compared to other phase system the widings in eachpahse are diaplced 360/3 = 120 degress .. Let me know if you have more doubts? read less
Comments
Dislike Bookmark

Tutor

It is all reference system. Its like if you are seeing rotor from outside then if you watching it moving clockwise. Then if we imagine you are standing on rotor, then u ll feel the surroundings are moving anticlockwise, think in this context. IT is what happens in actual.
Comments
Dislike Bookmark

In ac machine, rotating magnetic field (rmf) is required. By using 3 phase ie 120 degree displacement rmf is produced. now, we place Va-Vb-Vc in this sequence because Va start from zero.
Comments
Dislike Bookmark

Electrical Engineering ,gate

Its not always necessary that phase b is lag...it is just an examples we saw in books...for machines to rotate there should always a condition...that it rotates from leading axis to lagging axis.....
Comments
Dislike Bookmark

What you are saying about laging behind is a 3 ph voltage .. one phase voltage lags the other bt 120.. and physically windings are kept 120 apart to produce rmf.. Dont confuse with mechanical design and 3 phase supply
Comments
Dislike Bookmark

Student's Badhsha

in order to produce rotating magnetic filed b/w rotar and stator
Comments
Dislike Bookmark

Electrical Enthusiastic

to produce a constant rotating magnetic flux the manufacturer designed with 120 degrees phase shift
Comments
Dislike Bookmark

View 6 more Answers

Related Questions

Please give me information regarding mechanical engineering.
It is the branch of engineering dealing with the design, construction, and use of machines.
Venkata
Which technology is better to learn for doing project for campus drive placement.either web development or Android?
Both are good and have their own importance. It depends on your interest also. I think what ever technology u will choose be a proficient in that technology that is important . Android is more popular...
K
What is the expected cutoff of the Navy 10+2 BTech Entry 2018?
70% and above.
Parna
0 0
5
Are tuitions mandatory in the class 10 CBSE to score a 98%?
No, if you are strong in all subjects and can take guidance from your parents.
Brahma
0 0
6
I have just entered class 11. How should I start preparing for the IIT-JEE and board exams?
It is just the suitable time to begin your JEE and Board exam preparation. Start studying from NCERT books. They are a pre-requisite and will build a foundation for competitive exams. Divide the number...
Neha
0 0
7

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

A note for students
For students seeking education in school, all you need to know is that knowledge is more important than your marks. So, whenever you have your exams on the head, you start cramming up everything and end...

Ruby K.

0 0
0
Try to clear up the basics, if basics are clear then you can go ahead with any difficult problem
Hey guys, To all the students i just want to convey that just clear up your basics so that they can help you solve anyu problem and you would achieve a great success. Regards, Ishani Chakraborty

Ishani Chakraborty

0 0
0
What Is The Difference Between Scope And Lifetime?
Scope of a variable is defined as the block of code from where we can refer or access it. On the other hand the life time of a variable is defined as the time in between allocating memory for it and relinquishing...

Shiladitya Munshi

1 0
0
Radiation: Full Concept
Heat transfer mechanism in which no medium is required is called radiation. It refers to the movement of heat in waves, as it does not need molecules to travel through. The object need not be in direct...

Debraj Paul

0 0
0
Economic Design vs Compromise
Today,the structural design world is pressurized for economy and more economy!.There is a limit to economize if one want to abide by the codes of practice and also if one want the building to be robust...

Premjit Vasudevan

0 0
0

Recommended Articles

Tuitions for Professional courses - Does...

MBA, Medicine and engineering are the three main professional courses in India. Engineering is still one of the highly sorted after professional courses in the under graduate level, while MBA is favoured as a preferred post graduate course. To shine in these courses, one needs to work and study hard. Engineering as a...

Read full article >

Finding Tuitions for Bachelor of Engineering...

According to a recent survey conducted by the NCAER (National Council of Advanced Economic Research), engineering is the most sought after course in India. Some engineering courses are offered as BE or Bachelor of Engineering while some as Bachelor in Technology or B.Tech. Since engineering is a professional course, the...

Read full article >

Science, Arts Or Commerce - Which One To Go For?

Once over with the tenth board exams, a heavy percentage of students remain confused between the three academic streams they have to choose from - science, arts or commerce. Some are confident enough to take a call on this much in advance. But there is no worry if as a student you take time to make choice between - science,...

Read full article >

The Trend of E-learning and it’s Benefits

E-learning is not just about delivering lessons online. It has a much broader scope that goes beyond manual paper or PowerPoint Presentations. To understand the reach of E-learning and how the whole process works in developing the Educational system, we will discuss a few points here. Let us find out how this new learning...

Read full article >

Find BTech Tuition near you
BTech Tuition in Hyderabad
BTech Tuition in Bangalore
BTech Tuition in Delhi
BTech Tuition in Chennai
BTech Tuition in Mumbai
BTech Tuition in Pune
BTech Tuition in Kolkata
BTech Tuition in Noida
BTech Tuition in Gurgaon
BTech Tuition in Ghaziabad
Online Btech Tuitions

Looking for BTech Tuition ?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you
X

Looking for BTech Tuition Classes?

The best tutors for BTech Tuition Classes are on UrbanPro

  • Select the best Tutor
  • Book & Attend a Free Demo
  • Pay and start Learning

Take BTech Tuition with the Best Tutors

The best Tutors for BTech Tuition Classes are on UrbanPro

This website uses cookies

We use cookies to improve user experience. Choose what cookies you allow us to use. You can read more about our Cookie Policy in our Privacy Policy

Accept All
Decline All

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 55 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 7.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more

ThinkVidya Learning Pvt Ltd © 2010-2025 All Rights Reserved