Single layer Spiral coil

[vbeeeks]

just my 2 cents - follow - http://www.falstad.com/vector3dm/ - some java source that can be fiddled with specifically for md.

[Davor]

Ah! So it is a no go. OK.

[Aziz]

How about defining a size of a passive coil that overlaps two spiral or plain old coils to obtain IB? It will be a mere small shorted coil, and it will be placed on top of the both neck-to-neck spiral (or simple) coils.

I guess there must be some area ratio that must work universally, but I am not aware of any analytic approach to do it on paper - perfect candidate to squeeze some juice from your software.

This does not give any significant benefits (I've tried this already). Although it works (IB balancing and detection operation), it's more prone to magnetic minerals. The balancing is critical as mutual coupling effects cause more noise (oscillations).

Aziz

[Davor]

How about defining a size of a passive coil that overlaps two spiral or plain old coils to obtain IB? It will be a mere small shorted coil, and it will be placed on top of the both neck-to-neck spiral (or simple) coils.

I guess there must be some area ratio that must work universally, but I am not aware of any analytic approach to do it on paper - perfect candidate to squeeze some juice from your software.

[Aziz]

BTW guys,

I do not hide an interesting coil idea. I have shared all my coil related results with you.
Comeon guys, let's invent another valuable coil ideas. There must be some left over.

Aziz

[Davor]

I fondly share your point of view. I've seen my share of ****ty patents even before joining this great forum and MD hobby as such, but the amount of bull**** patents written in scholarly Trollish in MD technology is just appalling.

There are some great patented ideas, and even ones that my heart sings when looking at them, thank you Carl, and they are NOT Trollish at all.

[Aziz]

Is there any partcular reason why dont you provide closed source version of your program for free? This way you get to keep your code and people may use your work as it seems to be so brilliant. Could you provide a bit more practical reason why you prefer to keep such program only for you?

I my self support open source programming but that said, they usually are gui based programs for something and not pshusics calculation software. But since opensource rivals closed source programming and it benefits from user base growing and adding features fast where in counter closed source tend to keep things going slowly.

But that said, I dont see any reason why would you not take credit of building such outstanding magnetic simulation software as closed source?

Jeroi,

the visualisation of magnetic fields is one of the very trivial tasks in the numerical electro-magnetics. See the Biot-Savart Law for more details. But the software I have written can do a lot more in the art of metal detecting.

I do not want the patent trolls in the metal detecting business to use my software (either free, open-source, closed-source or licen$ed ver$ion). That's the crucial point. We want to share the coil ideas (& inventions) and use them license-free (not patented). Patent trolls do the other way round. Monopolising the market and squeezing out the customers driven by pure f$k'n greed.

Credits? I couldn't give a $hit.
F$k the evil patent trolls.

Cheers,
Aziz

[Jeroi]

Is there any partcular reason why dont you provide closed source version of your program for free? This way you get to keep your code and people may use your work as it seems to be so brilliant. Could you provide a bit more practical reason why you prefer to keep such program only for you?

I my self support open source programming but that said, they usually are gui based programs for something and not pshusics calculation software. But since opensource rivals closed source programming and it benefits from user base growing and adding features fast where in counter closed source tend to keep things going slowly.

But that said, I dont see any reason why would you not take credit of building such outstanding magnetic simulation software as closed source?

[Aziz]

Hello Aziz.

I have worked on open source software for many years. Putting a license on your software would free you from patent trolls. You could even publish your source code and put your software on the internet with the correct license. For example the GPL license will require people who improve your code to publish it. This way you will always benefit. Just my 2 cents...

Regards,
Joop

Hi Joop,

I do not want the patent trolls to use my software.
Aziz

[joop]

I hate patent trolls!!!

Hello Aziz.

I have worked on open source software for many years. Putting a license on your software would free you from patent trolls. You could even publish your source code and put your software on the internet with the correct license. For example the GPL license will require people who improve your code to publish it. This way you will always benefit. Just my 2 cents...

Regards,
Joop

[bernte_one]

hello aziz

i can understand you,

the offer you made is a word for me

i go to measure my coils and give you the data for calculating, many thanks.

regards

[Aziz]

hello aziz

i like your coil calculations since first time i see them

can you show visualisation for our homemade coils?
would calculate it by my own but without any help and no program i cant show result.

why do you sit on your knowledge and dont share, many thinks would be easier in live if we had the right tools. make a comercial product from it.

regards

Hallo Bernte,

specify your coil (exactly and not wishy-washy! ) and you will get the visualisation of it (for free). It must be published in the public domain however. Deal?

Nobody could operate the software without the extensive knowledge of the software internals and electro-magnetics (EM). To write a manual for the software would cost me a long time and big effort (for nothing).

On the other hand, the coil software has some potential for finding novel coil inventions (as happened on the 1. April 2012 ). I don't want to give it to the f$kn evil patent trolls. These inventions should be available to everyone instead. And I can guarantee the publication of it. So every coil design, which is suggested for analysis will be published in the public domain to avoid it's possible patenting.

The coil analysis causes a lot of work and I do it for free of course. I think this is a fair deal.

Cheers,
Aziz

I hate patent trolls!!!

[bernte_one]

hello aziz

i like your coil calculations since first time i see them

can you show visualisation for our homemade coils?
would calculate it by my own but without any help and no program i cant show result.

why do you sit on your knowledge and dont share, many thinks would be easier in live if we had the right tools. make a comercial product from it.

regards

[Funfinder]

Great stuff - with this visual calculators it should be
possible finding the strongest field concentrations!

because we wanna reach most distant metal by induction this info may helpful:

http://en.wikipedia.org/wiki/Wireless_energy_transfer#Electromagnetic_induction

also called: inductive power transfer (short: IPT)

What I don't understand:
Why the bucking coil B should "push" the field of coil A and
doesn't weaken or disturb it.

Vice versa seen the field of coil A could also pushes the
bucking coils B field so that one extends.

Electromagnetically seen the at say 10kHz pulsing and if both
coils are connected to the same TX source and pushing each
others EM field alternates all the time.

So I think the bucking coil only can work if it
has a steady magnetical field / current flow.

Or does the bucking has just half of the windings
compared with the working one?

Otherwise it results same as the electronical noise canceling
system used in helicopters -negative and positive sound
vibration amplitutes are deleting each others.

And not only the bucking coil "pushes" the field but also
the main working coil pushes the bucking coils EM field
into upper direction - but this only applies to the
short distance inbetween those coils; if the bucking
coils negative magnetical field reaches through the
working coil and beyond it, it will weaken the at that time
positive magnetical field which the working coil wants
to spread at the same time into this direction.

And what a role could ferrite play in this game?

btw. afaik an electromagnet with soft-iron-core reaches more
attraction than an "air-coil". Transformers too use such stuff
to reach higher efficiency. But thats 50-60 Hz and not 10 kHz
so I don't know.

Couldn't work a slighty like sat.-dish shaped spiral-coil
pointing down as focus to keep the EM-field directional?

[Aziz]

Aziz: what program do you use? I would be very glad to get used it in my engineeering studies.

This software program isn't available. Nowhere in the universe.
I have written this software.

Aziz

PS: No, I do not sell it either.