Re: [TCML] new toroid capacitance

[Steve Ward <steve.ward@xxxxxxxxx>]

Your shape still approximates the standard toroid pretty closely, id imagine
its capacitance is within 20% of a regular toroid of the same OD and height.

If you want an answer about capacitance to higher confidence, you can
determine it with some free FEM software:

http://www.femm.info/wiki/HomePage

There's some learning curve (both software and general E&M), but its a great
tool.  It can also tell you electric field intensity, so you might know
ahead of time whether this toroid design will be problematic at the expected
top terminal voltage.

Steve

On Thu, Mar 17, 2011 at 10:10 AM, Reverend Fuzzy
<cmayeux@xxxxxxxxxxxxxxxxx>wrote:

> Good try, but as stated, this toroid is slightly odd shaped, (as per the
> linked diagram), and the spreadsheet you refer to only has
> the calculation for a standard toroid shape.  Thanks for trying, though,
> Bob.
> ---
> Reverend Fuzzy
> Pastor, MSB Ministries
> Hattiesburg, MS
>
> > -----Original Message-----
> > From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of Bob Wroblewski
> > Sent: March 16, 2011 8:39 PM
> > To: Tesla Coil Mailing List
> > Subject: Re: [TCML] new toroid capacitance
> >
> > Hi Rev Fuzzy,
> >
> > Do a web search for QTC.xls then you can save it and use it locally.
> > It is a spreadsheet program from Ed Sonderman modified by Ross
> Overstreet. I've
> > used it quite often over the years. It has a toroid capacitance estimator
> based
> > on two dimensions of the toroid. My two cents worth. Good luck.
> >
> > Bob Wroblewski
> > Dracut, MA
>
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