RE: [TCML] NST Measurements

[Jim Lux <jimlux@xxxxxxxxxxxxx>]

Yes.. For the tc world, there are fem programs out there with limitations that are acceptable (e.g. Axisymmetric layouts.)  there's some electron optics codes that do nice field calcs for things made of coaxial tubes, cylinders, rings etc

-----Original Message-----
From: "Kurt Schraner" <k.schraner@xxxxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: 1/21/09 09:31
Subject: Re: [TCML] NST Measurements

One of those free finite element programs Jim Lux is mentioning, is David 
Meekers FE method magnetics simulator FEMM. I was using it for some of my 
induction coils, and it was not really hard to learn, giving results of i.e. 
L1,L2, which were in good agreement with my measured values.

http://femm.foster-miller.net/wiki/HomePage

Citing David Meeker:
"A Windows finite element solver for 2D and axisymmetric magnetic, 
electrostatic, heat flow, and current flow problems with graphical pre- and 
post-processors."

Well, my induction coils are axisymmetric, and there may be some error in 
modeling transformers as 2D. (The program version I was using is 3.2 of Dec 
3, 2002 while the actual Version is 4.2).

Regards, Kurt

jimlux wrote:
> Godfrey Loudner wrote:
>> It's too bad we can't get hold of the sophisticated software
>> companies use to design transformers. The ones I saw advertised on
>> the web cost about $80,000 or can be rented. They seem to use finite
>> elements to deal with the horror of the differential equation
>> involved. The programs can even deal with the thermodynamics of the
>> transformers. I'm beginning to believe that the details of the

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