Single layer Spiral coil

[Jeroi]

Aziz: what program do you use? I would be very glad to get used it in my engineeering studies. I would need still the inner coil reversed photo to think which configuration is better.

[Aziz]

Here is the classic concentric co-planar IB coil.
Cheers,
Aziz

[Davor]

True, but as they are separated further, they become more independent, and less mutually supporting. I aim for a system that comprises 4 coils in a kind of lucky clover design, and with the least possible spacing between them and with no overlapping. Hence the distance specified. Two and two coils in criss-cross will be arranged in antiseries and hooked respectively to Rx and Tx providing a perfect double balanced IB system. And electronics in a center of it all. Works perfectly in my head.

[Aziz]

other cross-section

[Aziz]

Yesss! That's it. A blue dot in between (to place PCB etc.)
..

Hi Davor,

if you increase the distance of the coils, the "blue dot" region grows. Below is the coil diameter distance of the coils.
Aziz

[Tinkerer]

Tinkerer, can you provide pohotos of concetric loops?

1. reverse current in inner half scale of outer dia of 25cm and inner about 12,5cm
2. same values but current in same direction in both coils.

Thanks alot for these nice pictures.

I think you mean the "classical concentric IB" configuration.

This would be about 20 turns outer TX and 5 turns Bucking coil inner.

It is Aziz, not me doing these fantastic visualizations, made with his own software.

Tinkerer

[Jeroi]

Tinkerer, can you provide pohotos of concetric loops?

1. reverse current in inner half scale of outer dia of 25cm and inner about 12,5cm
2. same values but current in same direction in both coils.

Thanks alot for these nice pictures.

[UFO]

That's pretty cool.

[Davor]

Yes, but no cigar Domains are not joining. There is something happening above, a minimum is pushed somewhat, but I think more slant will not be practical, at least for my purpose. It seem that more slant will not do much.

This is the very reason I am seeking a visualisation software that will run as smooth as it does for you.

Anyway, I got what I was looking for: a cold spot between coils to put kit and caboodle for underwater ... thing.

[Aziz]

Davor,

10 Degree rotated at y-Axis (symmetric)
Right so?

[Aziz]

Keeping the distance of the 2 bundle coils at about r/2 or r/3 should be OK then.

Thanks Aziz

Tinkerer

r/2 taken + high resolution

[Davor]

Yesss! That's it. A blue dot in between (to place PCB etc.)
I kinda hoped to see joining of the fields underneath in a middle a bit more pronounced, but there I have it. If you could be bothered a bit more, could you slant the coils a bit, so that the field domains get a bit more focus in a middle? I have no idea how much will be OK, but I guess just a little, some 10° each or something.

I'm thinking of a hydrodynamic drag to fit with self-contained MD, completely intrinsic with batteries and all, watertight and balanced to almost float in water to be pulled near seabed or a river bed. The most complicated bit was - where to put electronics. Now I know. Thanks.

[Aziz]

High resolution.

[Tinkerer]

Keeping the distance of the 2 bundle coils at about r/2 or r/3 should be OK then.

Thanks Aziz

Tinkerer

[Aziz]

With outer coil diameter being 1, I wish to see coils at rim to rim distance of 0.42, while for other parameters you may use anything you wish, say d/D=1/3, say 20 turns or something

See below.