Successful TPU-ECD replication !

[Jdo300]

Hi Roberto,

AWESOME TPU/ECD you have there! Also, nice partial sine waves on the collector! I'm going to have to scope across the phase wire next time, I was always looking at the ZERO line which may explain why I didnt see any sinusoids forming. Is your scope probe still connected to the circuit ground when the probe is on the PHASE wire or is the scope ground on the ZERO line?

Also, I see another 14-pin DIP on your circuit board along side the IRF7307, what is it?

God Bless,
Jason O

[Jdo300]

Hi Roberto,

One other thing looking at your scope shots. I find it quite remarkable that your partial sine wave seems to have a period of about 40 uS, which is only 25 kHz! This is amazing to see considering the extremely short lengths of wire on your TPU! Does the sine wave appear to be the same frequency for all your TPUs or does it, in fact, vary with the coil's circumference? This is a clear sign that there is something else going on than simple coil resonance!

Hopefully I won't be too far behind you in the testing department. There are just so many other life distractions slowing me down.

God Bless,
Jason O

[gn0stik]

Hi Roberto,

One other thing looking at your scope shots. I find it quite remarkable that your partial sine wave seems to have a period of about 40 uS, which is only 25 kHz! This is amazing to see considering the extremely short lengths of wire on your TPU! Does the sine wave appear to be the same frequency for all your TPUs or does it, in fact, vary with the coil's circumference? This is a clear sign that there is something else going on than simple coil resonance!

Hopefully I won't be too far behind you in the testing department. There are just so many other life distractions slowing me down.

God Bless,
Jason O

Tell me about it. Last night was my big chance, and couldn't get it going. I have an inspector coming up tomorrow for the people who are buying our house so I had to pack it all up to pick it up later. Couldn't get my fets to fire. Everything else was fine. dunno.

anyway, it'll prolly be mid next month before I can pick it up again. Ack.

Oh well.

Perhaps changes will take place that will allow me to do this a bit easier in that time.

A lot can happen in a month.

I'll get my TPU wired up, at any rate, and ready for feeding, as I'm sure it will be hungry by then.



Regards,
Rich

[ronotte]

@GK,

you are the MAESTRO: your assembly is remarkable..COMPLIMENT! please let me now your tests I'cant wait.

@Rich,

sorry you are not on line ...for the moment I'll wait for you just call me I'll give any help.

@Jason,

so sorry I meant it was clear that the point to probe were PHASE ...that's because of the name!  (it remembers the old electricians looking for phase with the neon screw-driver).

Your efforts are valuable please do continue the MOSFET box building. I followed a simpler way: just a small PCB with 2 drivers on-board.

@Darren,

your SPICE simulation is really nice and useful: if you like I can mesaure the coils parameters in order to make a more correct simulation. Unfortunately for us it cannot take in account the mag fields interactions into Mobius coils. I've also SPICE and have used it extensively in the past, now it is impossible because it will clobber my Notebooks...Hmmm I've to use another computer and reload it (I've PSPICE).


To all,

Hey it is easy! I've sinus conversion with just 1 coil (remember the Otto's 50 turns on two fingers...).  ....DO IT and help with the many coming extensions.




Ciao

Roberto

[Thedane]

@Darren,

your SPICE simulation is really nice and useful: if you like I can mesaure the coils parameters in order to make a more correct simulation. Unfortunately for us it cannot take in account the mag fields interactions into Mobius coils. I've also SPICE and have used it extensively in the past, now it is impossible because it will clobber my Notebooks...Hmmm I've to use another computer and reload it (I've PSPICE).

Ciao

Roberto

It is possible to simulate coupling(s) in SPICE/PSPICE - IF you "just" know the right parameters 
The mobius coil should be well described as it was modelled by a mathematician.

There's more interesting info about transformer coupling here:
http://dave.uta.edu/dillon/pspice/pspice06.htm