cComega virtual coil

[Esteban]

Thank you Esteban
Very informative.
Seems as one of multi-frequency stuff?
Thanks

This runs near 20 Khz.

[Aziz]

Update:
Coil software runs now faster (better for me! ). Calculation of L, XL, QL, Magnetic Flux (Φ Phi) etc. finished. Voltage induction is in progress.

It is interesting to place a target, calculate the induction (like eddy current) of target and then calculating back the effects for the receive coil. So I can compute a sensitivity map for a given target.
The picture below is not the sensitivity map. But it shows the mag. field strength at a given distance (z=100 mm). The target must be placed allways on the max. sensitivity position (x,y-parts), to compare different coil configurations properly. So this causes it a bit more software implementation.
Happy easter,
Aziz

[Aziz]

During some software tests for inductivity and induction calculations, a nice excel sheet for inductivity calculations is done.
If you like, then use it. The sheet is protected (empty password for unprotecting). Just enter coil parameter on white fields. Yellow fields are calculated. Ignore all coil software parameters (particularly second table below).
Soon I will have some very interesting results. I have implemented the TX (transmit), RX (receive) and Target (secondary TX) model simulations. So all induced currents on the Target model will have effects to RX coil. This will be shown as a decibel factor or sensitivity map.

Aziz

[Aziz]

Hi,

I got it now! I have modeled a target model and can extract sensitivity map. It is proven, that the higher the magnetic field strength on target position is, the higher will be the induced voltage and the influence to the RX (receive) coil. It depends additionally on the RX flux area (where the RX coil is placed). The graphics below show, that the maximum sensitivy eare is a place between the axial center position of the RX coil and the max. magnetic field strength. The max sensitiv position depends on the target height.

Soon, I will be able to get more deeper physical coil analysis. But I have to implement more code.

Model data:
Frequency f=15 kHz
Current I=1 A

[Aziz]

Another view of cross section of sensitivity map (y=0).
Happy analysing..
Aziz

[Aziz]

Ok, I forgot to upload the image!

[WM6]

Hi Aziz, seems target coming with some copper oxide?

[Aurificus]

Aziz,
Great stuff!!, thanks for sharing your hard work.

cheers, Aurificus.

Yesterday, I stood on a precipice..........

............................................... Today, I took a major step forward...

[Aziz]

Hi Aziz, seems target coming with some copper oxide?

Hi WM6,

yes, it looks like so. On newer models, I have changed the color to precious yellow! I also took the resistance parameters for gold (very good conductor). Its not easy, to model the gold ring. But gives a good approximation result.

Now enough coded the coil software. I will simulate more coil configurations in the future.
Aziz

[Aziz]

Now enough coded the coil software. I will simulate more coil configurations in the future.
Aziz

What a humble sight! I will leave the quasi static model and will enter the frequency domain. Also, I will prepare the software for eddy current effects. So all currents, voltages etc. will be computed in a complex (amplitude+phase) manner in the future. Otherwise, I will not be accurate enough. I have to continue the coding...
Regards,
Aziz

[Davor]

So - what happened?
You got me interested all over and ... puff. It stops.