[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

*To*: Tesla Coil Mailing List <tesla@xxxxxxxxxx>*Subject*: Re: [TCML] inductance Vs diameter Vs height*From*: DC Cox <resonance@xxxxxxxxxxxx>*Date*: Wed, 11 Aug 2010 17:23:20 -0500*Delivered-to*: teslaarchive@xxxxxxxxxx*Delivered-to*: tesla@xxxxxxxxxx*In-reply-to*: <10201F829D4B4F39BCEAD876EF17300C@Phillaptop>*List-archive*: <http://www.pupman.com/pipermail/tesla>*List-help*: <mailto:tesla-request@pupman.com?subject=help>*List-id*: Tesla Coil Mailing List <tesla.pupman.com>*List-post*: <mailto:tesla@pupman.com>*List-subscribe*: <http://www.pupman.com/mailman/listinfo/tesla>, <mailto:tesla-request@pupman.com?subject=subscribe>*List-unsubscribe*: <http://www.pupman.com/mailman/listinfo/tesla>, <mailto:tesla-request@pupman.com?subject=unsubscribe>*References*: <4C61B015.7090106@xxxxxxxxx> <10201F829D4B4F39BCEAD876EF17300C@Phillaptop>*Reply-to*: Tesla Coil Mailing List <tesla@xxxxxxxxxx>*Sender*: tesla-bounces@xxxxxxxxxx

It works out to 0.9. I you build coils this way they will definitely flashover top to base. Dr. Resonance On Wed, Aug 11, 2010 at 12:34 PM, Phil Tuck <phil@xxxxxxxxxxx> wrote: > Scott: > > I came across this post the other day while looking for something related: > http://www.pupman.com/listarchives/2009/Mar/msg00178.html > I do not know if it is correct though !! > > Phil > > It says "The ABSOLUTE MAXIMUM Inductance from a given length of wire, the > section should be circular and the with a ratio of a = 2.575r where a is the > radius of the circular axis of the coil and r is the radius of the > cross-section - eg a torus... > The inductance is L = 5.35 * PI * N² * a * 10-³ microhenries > where N = total turns > > For a SINGLE LAYER coil (ie classic tesla coil) where the turns are close > wound, the maximum inductance for a given wire length is: > diameter/ breath = 2.415 > which is probably why tesla's magnifier was so fat and squat - maximum > inductance and hence maximum coupling and energy transfer to the secondary > before being fed to the extra coil...? > > For a FLAT CIRCULAR COIL - the lowest resistance - and hence max time > constant/maximum inductance of a flat circular coil is is obtained when > inner radius r1 is about 0.4 of the outer radius r2. > This coil has 99% of the maximum efficiency when r1/r2 < 0.7. > > I have not verified these sizes and shapes and equations personally - but > they should be easy enough to plot on a spreadsheet.. the best way to do > this would be to have a constant turns per inch ration and this simplifies > the terms need to plot. then the basic inductance equation adopts the form > D²*Length with everything else being constant..... " > > > From: Scott Bogard > Sent: Tuesday, August 10, 2010 9:01 PM > To: Tesla Coil Mailing List > Subject: [TCML] inductance Vs diameter Vs height > > > Hey all, > Off the top of your heads can anybody tell me the most efficient > surface area to inductance ratio of single winding solenoids? What I > mean is the most efficient surface area to volume ratio for cylinders is > 1 to 1 diameter to height, I am wondering if this applies to inductors > also, or if a single turn of huge diameter is better, or perhaps zero > diameter and infinite turns or somewhere in between. So for a given > wire length, what configuration yields the highest inductance for single > layer I guess is what I am asking, just curious and thought someone > might know a short answer, and have any thoughts as to if this could > apply to coiling in any way. > > Scott Bogard. > _______________________________________________ > Tesla mailing list > Tesla@xxxxxxxxxx > http://www.pupman.com/mailman/listinfo/tesla > Regards > Phil Tuck > > www.hvtesla.com > _______________________________________________ > Tesla mailing list > Tesla@xxxxxxxxxx > http://www.pupman.com/mailman/listinfo/tesla > _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla

**References**:**[TCML] inductance Vs diameter Vs height***From:*Scott Bogard

**Re: [TCML] inductance Vs diameter Vs height***From:*Phil Tuck

- Prev by Date:
**Re: [TCML] MMC Caps** - Next by Date:
**Re: [TCML] America's Got Talent** - Previous by thread:
**Re: [TCML] inductance Vs diameter Vs height** - Next by thread:
**Re: [TCML] inductance Vs diameter Vs height** - Index(es):