Coil Analysing Software

[Aziz]

During last days, unsleepy nights and weeks, I improved my coil analyser software. This will help us, to understand and improve search coil configurations in the future. Give me more time, to finish the software coding. It is really impressive to change the 3D-Display in real-time.

Following screen shot of current software.
Aziz

[Aziz]

A lot of work is done during last days but not enough to get a good software to analyse the MD coils. I am still working on it.
Interesting double toroid coil arrangement (see below). But nothing for MD - just for education.

[bbsailor]

Coil Analysis Software Question

Aziz,

Could your coil analysis software demonstrate the field strength pattern of a DD coil, especially the overlap region and what happens as the overlap region is made larger or smaller?

Thanks

bbsailor

[Aziz]

Hi bbsailor,

Aziz,

Could your coil analysis software demonstrate the field strength pattern of a DD coil, especially the overlap region and what happens as the overlap region is made larger or smaller?

Thanks

bbsailor

DD form factor coils are not implemented yet. It is just a matter of some investing hours to do this. I will do this as quick as I can arrange this. This was anyway intended my me.
At the moment, I can design elliptical, circle, cylindrical, flat spriral, toroid and spider coils. I have to analyse the DD form factor how to calculate the coil wire pieces and to define the parameters properly.

Coming soon with facts.
Aziz

[Aziz]

Hi bbsailor,

I just implemented the coil design software to generate DD-coils. It was easier than I have expected. I have combined two different elliptical coils with Radius a, b and a2 (short Radius). The this gives a more practical coil form factor. Indeed, the cross section magnetic strength field looks like very interesting. Without analysing deeper, I put two cross sections (x-Axis, y-Axis) of same coil configuration. 10 windings, 1 A. Winding directions see wire parts on graphics.

For further analysis, I need the following feedback:
- Radius A (big elliptical radius towards x-axis)
- Radius B (big elliptical radius towards y-axis)
- Radius A2 (small elliptical radius towards - x-axis = negative x-axis direction)
- Number of windings of each coil + direction
- Current flow (same?)

Aziz

[chemelec]

Hi Aziz, Just curious, Are you going to make this software available as "freeware, shareware or for Buying it", when you have it complete?

[bbsailor]

AZIZ,

It looks like a DD coil pattern matches what a DD coil field pattern should look like. DD coils have a wider field pattern than a mono coil field pattern that is more pointed in the center.

Try this. Make the TX coil 300 to 350uH and the RX coil 450 to 500uH. Start with making them round at an 8" inside diameter at about 5 ohms for the TX coil and 7.5 ohms for the RX coil. Overlap the two coils and show how the output of the RX coil goes positive, null, and then negative as the overlap region is changed. The RX coil should be loaded by approximately 1K ohm damping resistor and the TX coil should be loaded by approximately 750 ohm damping resistor.

What is interesting is looking at the field strength of areas in and around the coil overlap region as well as the RX output null voltage. The when you introduce a metal target within the overlap region field, see how that affects the output voltage of the RX coil.

This would be a practical application of your software that experimenters could appreciate when different target signatures are developed to stimulate the coil.

Nice job!

bbsailor

[Aziz]

bbsailor,

give me more time, to implement new graphics functions. Due to the asymmetry of the coil arrangement, I want to display cylindric rotated cross section fields. Then I will start analysing some of the configurations, that you mentioned above.
Indeed, the magnetic fields caused by two transmitter coils, gives a more depth range possibility. Of course, this applies not for DD-coils with only one TX coil and one RX coil.

The graphics on DD coils above are individually log-scaled. On the next graphics I will do equal scaling for all graphics, that can be compared easily together (same color for magnetic strength).

chemelec,
I do not know, what I am going to do with the software. It is just a tool for me to find good coil configurations. It is far away to be assumed a product. May be in the future, I will put a demo version for some coil configurations. A lot of work has to be done till then.

Aziz

[Sean_Goddard]

WOW Aziz, U GENIUS!!

I'd buy a copy of that software ANY day of the week if it's priced right.

BTW can it analyse FULLY resonant coils like are used on the Nexus (apparently)?

[Aziz]

BTW can it analyse FULLY resonant coils like are used on the Nexus (apparently)?

Not yet. This software is just using magneto-static characteristics. Any dynamic behavior (e.g. time-domain changes) are not taken into considaration at the moment. But if I need one day some functionality, then I will continue coding.
On the next step, I want to compute the inductance and the capacitance of any coupled coil configuration. So this will also enable calculating the induced voltage on the coils.

Aziz

[Sean_Goddard]

How much would you like for a copy that I can start evaluating, let me know your email address via PM and I'll Paypal you the money no problem.

[Aziz]

How much would you like for a copy that I can start evaluating, let me know your email address via PM and I'll Paypal you the money no problem.

The software is in experimental state, so I have to tidy up the whole code. And there are'nt existing documentation yet and it has too many settings. For an unexperienced user, it would be quite difficult to work with. This could be a work for month, that would prevent my current coil development. So the selling of the software as a product is not intended at the moment.

Aziz

[Aziz]

Please excuse my beeing late. The DD coil analysis will be delayed for some time. I have to rewrite the graphics parts of the software. Windows GDI (Graphics Device Interface) s.u.c.k.s and is really too slow for my taste. So I have decided to implement some important primitives (polygon, etc.) with improved capabilities (alpha blending, z-buffer, gouraud shading, etc.) and speed enhancements (for real-time display). The rendered graphics output will then be superb.
Aziz

[Unregistered]

Dynamic magnetic fields analysis software

Hello Aziz,

Your software allready looks impressive...compliments to you

I remember from a former workplace that physicians used a software called
MAFIA based on FEM Finite element modelling and that works also for dynamic models
from DC to terraHz they say...

I wanted to give it a try then to simulate elecrtric guitar pickups but finally never did

But maybe you know it allready

http://www.cst.com/Content/Documents/Products/mafia.pdf

Hope it might inspire you and keep on the good work