Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Magnetic Coil

Magnetic Coil

Magnetic Coil

A magnetic coil consists of 24.9 turns ( the last turn is not fully complete).
Is this coil of 24 turns or 25 turns ?

RE: Magnetic Coil

Thanks nbucka, so if we are going to wind bifiller centre tap secondary winding of a transformer, we can start with the centre tap and continue till we end up with two terminals. one will pass the centre tap ( N+.1} and the other terminal will end just before the centre tap (N-.1}.
Can we call these two windings magnetically equal and each has N turns ? neglect the small difference in the wire ohm resistance

RE: Magnetic Coil

The resistance determines the loss in the form of heat,
the voltage changes with the inductance which depends
on the magnetic force lines IN THE CORE.

For simplicity let's call the portion of the wire
which is perpendicular to the iron core "lead" and
the portion which surrounds the core "coil"

If you want equal voltage, make sure that the
angle between the beginnings and ends of both coils
are the same, in this case 24.9*360 = 8964 degree
and their distance from the core (diameter) is not
too different. The leads have no effect on the voltages

Plesae read FAQ240-1032
WEB: <http://geocities.com/nbucska/>

RE: Magnetic Coil

In normal 50 or 60 hertz or audio transformers, nuumber of turns is the number of turns that pass through the core. There are no 1/2 or 1/4 or 0.95 turns.
An exception is with an E-I core. In this case there can be a 1/2 turn, but the 1/2 turn will have high impedance.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close