FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups 
 ProfileProfile   PreferencesPreferences   Log in to check your private messagesLog in to check your private messages   Log inLog in 
Forum index » Science and Technology » Physics » Electromagnetics
inductance vs skin effect
Post new topic   Reply to topic Page 2 of 2 [16 Posts] View previous topic :: View next topic
Goto page:  Previous  1, 2
Author Message
operator jay
science forum Guru Wannabe


Joined: 29 Apr 2005
Posts: 142

PostPosted: Thu Jun 09, 2005 5:13 pm    Post subject: Re: inductance vs skin effect Reply with quote

"Francois Grieu" <fgrieu@francenet.fr> wrote in message
news:fgrieu-605EBB.17592906062005@news5-e.proxad.net...
Quote:
In article <DQWoe.2753$mN.31518@news1.mts.net>,
"operator jay" <none@none.none> wrote:

y =
e^(-x) , 0<=x<=1
e^(x-2) , 1<=x<=2

This would show a symmetrical current density profile in a finitely
thick
conductor of rectangular section

but there is a sharp discontinuity (change of sign) of the derivative
at x=1, when there is physically nothing special at that point.
That's why I suggest
e^(-x) + e^(x-2), 0<=x<=2

then I renormalize by integrating, just the way you do.
This gives nearly the same result for a conductor that is either
much thicker or much thinner than the skin depth, but a very
different result around the skin depth.


François Grieu

Adding the extra term bothers me. What do you do for a (square) four sided
section? Use four terms? Eight sided? Use eight terms? Circular?

I agree that discontinuity you spotted does seem out of place, but, there it
is in a round conductor too, I think, and the approximation (if that's what
it is) is still used.

Of course, this is just food for thought. Once again I really can't say
anything of certainty. Maybe you'd have to do the calcs all the way through
with differential equations to get the actual distribution.

j
Back to top
Google

Back to top
Display posts from previous:   
Post new topic   Reply to topic Page 2 of 2 [16 Posts] Goto page:  Previous  1, 2
View previous topic :: View next topic
The time now is Thu Nov 15, 2018 9:31 pm | All times are GMT
Forum index » Science and Technology » Physics » Electromagnetics
Jump to:  

Similar Topics
Topic Author Forum Replies Last Post
No new posts Effect of temperature on pH of acid? Paucceri Chem 0 Wed Aug 16, 2006 5:50 pm
No new posts " f o f = g ; f a half effect of g " alain verghote Math 7 Mon Jul 17, 2006 3:02 pm
No new posts New Inductance The Real Chris Electromagnetics 96 Sat Jul 15, 2006 6:38 am
No new posts HPLC/UV Effect of Flow rate on Area Count denise.pattavina@gmail.co Analytical 1 Thu Jul 06, 2006 3:43 pm
No new posts Effect of Flow Rate on Area Count denise.pattavina@gmail.co Analytical 3 Thu Jul 06, 2006 2:32 pm

Copyright © 2004-2005 DeniX Solutions SRL
Other DeniX Solutions sites: Electronics forum |  Medicine forum |  Unix/Linux blog |  Unix/Linux documentation |  Unix/Linux forums  |  send newsletters
 


Powered by phpBB © 2001, 2005 phpBB Group
[ Time: 0.0129s ][ Queries: 16 (0.0026s) ][ GZIP on - Debug on ]