Author Topic: My new approach  (Read 62559 times)

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Re: My new approach
« Reply #488 on: June 02, 2024, 05:23:16 am »
The same can be done with a small flyback core placing the primary on one led and secondary and feedback on the other leg

We need it to have a high impedance output so maybe 30:1

Also some resistance is interesting to reduce the current out of the tuned condition


And here the primary need some fixed impedance maybe some 30ohm in parallel with the primary with
 a diode

Need to think some more on it but it’s getting really interesting now


In the case of the singe cell with Vic around only the length need to be tuned

With multiple cels you get each cell with a drive and they all share same clock

So first you tune the coil to it with one cell than all other cells will work when switched on with their plls


Hum


« Last Edit: June 02, 2024, 05:44:03 am by sebosfato »

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Re: My new approach
« Reply #489 on: June 02, 2024, 05:33:31 am »
I wrote two correct things and two incorrect

What were them?

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Re: My new approach
« Reply #490 on: June 02, 2024, 06:17:47 am »
How would you know the current drop to zero?

Well the secondary voltage will peak

The series variable inductor should go to the Lowe’s t value

Any series inductor or resistor would have a drop in voltage so would not be useable

So the way to go seem Stan splited the system into a resonating coil that is tuned to the cell and the Vic that finds and tune to the cell frequency

And on this Vic he uses this low coupling to advantage and make the phase zero when the current is zero so the feedback winding start making sense I guess if I’m not confused

Anyone ideas about?




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Re: My new approach
« Reply #491 on: June 02, 2024, 12:18:56 pm »
How about active filtering or active signal processing

For example a very tiny core with two coils one primary one secondary pulse with 5v and connect in series with the power secondary

If the current on the power secondary is zero the phase will be zero on the tiny secondary

Now we put a resistive wire on the secondary

It will do what? Well the secondary voltage will only be similar to the input voltage when current is zero or very low

So it may be a manner to simply detect the resonance and lock to that frequency on water

I was asking gpt about it and seems the feedback coil would get more coupled to the primary mutual inductance so it would not present a lag when anothe coil on the core is loaded


So it need to be connected in series to get useable signal


If for example it has 10v induced and 100ohm a 100ma signal would be able to distort the phase very well

But as we increase the resistance on primary or secondary we get more sensitivity




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Re: My new approach
« Reply #492 on: June 02, 2024, 18:06:15 pm »
I just finished one coil it went very well but the motor kind smokes I added a capacitor to try lowering the voltage and better use the rectifier 10mf 67v seem to help have more force with less voltage applied

So I took the former out and the coil kind of got some loose but it’s ok according to the theory

With 54 ohms it will consume up to 5 w with 200m amps each coil in resonance

Has 5koh at 10khz so it mean a Q factor close to 100 considering one coil only

I decided to start again as the wire got loosy and now I’m going to use something to glue in between the layers so the coil stay in form when I take the pressure out

I added the separator before now to avoid having the coil to open

Forgot to put on the left side to though but I hope the glue keeps in place or maybe I don’t take the thing out at all or maybe just cut a piece out since is 3d printer is easy to cut a slice


It’s like a dream coming true



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Re: My new approach
« Reply #493 on: June 02, 2024, 20:44:32 pm »
This  200ma should give 1000 volts on the coils

So considering all the coils 1.2amps this make the impedance 9 ohms

So if the primary coil let’s say have 50v for it it would need a 1:5 step down because it need to have 11v to apply this current …

As we have 1501 turns on the secondaries and they are all in parallel I imagine they will get the same induced voltage but as this is an air core probably the wire length matters


This coil had 196m of wire in it

I used cianoacrilato to make it hard as it is wound randomly on the layers

My wire has the size of a 28awg but the resistance of a 29awg they sold me it as if it was 29

It may be a bad copper purity so basically is a 28agw but it’s a little more resistive like it was a 29

I will have to live with it

It take a long time to cool down the machine… I decided to add some ventilation to help the variac that is suffering and the motor

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Re: My new approach
« Reply #494 on: June 02, 2024, 21:32:02 pm »
So the great finding is that the secondary will have a higher voltage or peak when I get the water tune if has a low coupling

This will help find the right spot

Basically one way to trap it is to have the secondary on this small transformer so that it is vey losely coupled to the primary

And than pulse it sweeping at the tuned point

If the feedback coil is ove the secondary it will be more coupled to it than to the primary so it should captur the phase of the secondary coil (need a good gap between the coils

The primary can have a input resistor to limit the voltage it will also help the voltage peak when current drops


Basically I need to look this seondary voltage phase in relation to primary when there are in phase the current dropes

In my setup I can change the cavity length so I’m going for a fixed resonance frequency maybe just a very small variable coil to change it a little once I find the correct one

The first thing is to make the coils very well balanced

I hope having the same number of turns and being in parallel should help

Interalating them rediuce the coupling with eachother while favor the coupling with the opposite coil seems to be the correct way of doing

Or maybe if connecting the coils in series could be useful too as would rise the series resistance I may try in series next time I’m going with parallel because I thought it first and seem simpler

To make them in series would be something more complicated

I mean to have them well coupled

Makes sense? Thinking About that a Thinner coil would couple even better

But than we start having less turns so lower inductance
« Last Edit: June 02, 2024, 21:51:49 pm by sebosfato »

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Re: My new approach
« Reply #495 on: June 05, 2024, 19:26:17 pm »
Lot of  work this days

I blame myself that I didnt discovered all this before if it was so simple .