Talk-Polywell.org

Hey guys, I’ve spent the last couple of days working on a 3D magrid magnetic field viewer using Mathematica only. I just finished generating the 3D winding geometry for tombo’s single winding spherized octahedron configuration. It took me a lot of trial and error just to figure out how to get the co...

R. Peters,

I tried to run all three versions of Radia on my copy of Mathematica but my version will not work with any of the available Radia distributions.

Oh well...

~Randy

rjaypeters wrote:Randy,
I don't have Mathematica, not sure I can convince my spouse to spend $2500 (or even $250 for M. Home which might not work?). Drat.

...been there dude. But family always comes first... The rest is just your hobby.

~Randy

Randy, FEMM looks like a 2-D program, but don't we need a 3-D analysis? The FEMM site points to Radia, a 3-D program. ... I am toying with learning FEMM or Radia to do the analyses. Because of my ignorance of things magnetic, I'm not the best choice for the job. ... rjaypeters, Yes FEMM is a 2D pro...

Hi Everyone, For calculating the magnetic forces between two coils I use an FEA program called FEMM. The FEMM program is free to the public and dirt simple to learn to use. I use it to calculate the forces on the rotors of magnetic bearings. After you have entered the geometry of the problem, the pr...

Hi Aero, For calculating the magnetic forces between two coils I use an FEA program called FEMM. The FEMM program is free to the public and dirt simple to learn to use. I use it to calculate the forces on the rotors of magnetic bearings. After you have entered the geometry of the problem, the progra...

I really don’t want to give my power transistors away unless we can come up with a system that can at least produce some measurable deuterium fusions (neutron radiation). D2O can be concentrated by simply boiling water slowly at the boiling point. D2O is heavier than H20, so it will boil off at a sl...

... If someone has a big enough, good enough chamber and power supply, I'd be willing to wind a number of potential designs. I'm thinking about 30cm radius but only 16ish turns. Anyone? Don't all answer at once! ;) Hi Kiteman, I know you’ve been looking for parts to make a prototype magrid testing ...

try removing every other coil. i.e. all "north out" coils, since like you said adjacent coils in this are going in the same direction, the three neighboring edges of the "north in" coils will provide the necessary current for the "north out" field. then you get rid of those funky "saddle" cusps. wh...

So, for ANY magrid design you will have a set of faces where the magnetic field goes inward and a set of faces where the magnetic field comes outward. In this respect the octahedron configuration of which I’ve spoken earlier is no different than a WB6 (truncated cube) or WB7 (rectified cube). The on...

(A+) Kiteman,

Nice progressive set of examples.

First: magnetic field of a loop (of which a solenoid is a special case) is just F1) {number of turns} * current * mu-nought inside the loop, outside it is reduced by 2 * pi * d^2. If there are multiple loops, you just vector sum the effect of all of them at any point you choose. The formula acquire...

You are only proving you don't understand the software you are using. Explain what I don't understand - Please do so - because I do want to understand. What you are graphing is exactly the graph of a 4-wire system - such a system has NO poles. Technically, in an electromagnet, there are never any p...

There are no "VIRTUAL COILS" because those rings are not complete. The "cusps" are merely places where the outgoing magnetic field lines concentrate, because of the geometry of the coils. Physics-212 stuff, guys. Chapter 28 of my first year physics text (Giancoli, 2008). I'm sure you are only getti...

icarus wrote:Problem, the regions you refer to in your above plots as "virtual poles" are actually rings, ...

What do you call a 'ring' here? I mean - what is the definition of a (magnetic?) ring?