Author Topic: My new approach  (Read 62540 times)

Login to see usernames, Login to see usernames and 38 Guests are viewing this topic.

Online Login to see usernames

  • Global Moderator
  • Hero member
  • ****
  • Posts: 4181
Re: My new approach
« Reply #472 on: May 26, 2024, 02:32:46 am »
I finally decided how I’m going to do the coils

I’m printing some more pieces to directly hold the acrylic tube on the coil Machine

Also a ring that will make the lenght adjustable

And also separators to slide in once each coil is ready

The coil will have 25mm diameter inside and outside 60mm

Than I will try to make 50turns per layer till the end

The idea is to limit the voltage difference per layer after all if I put 5kv on a coil having 2500 turns its 2v per turn times 50 would be 200v difference between the layers ends

Make six of this with separator having 3mm thick

They may be connected in parallel or series but I plan parallel

What is important is the wire diameter the finer the greater will be the efficiency of the magnetic field being generated

But once the wire is selected adding them in series or parallle is indiferente because what is important is current times voltage for power

Above them there must be another coil with a single layer and can be a even finer wire because will not be in resonance

This coils should cancel the other coils voltage like the bifilar would do for the feedback of water signal be possible to be extracted cleaned

I think with this amount of magnetic fields will be easier to get pressure waves feedback






« Last Edit: May 26, 2024, 02:49:03 am by sebosfato »

Online Login to see usernames

  • Global Moderator
  • Hero member
  • ****
  • Posts: 4181
Re: My new approach
« Reply #473 on: May 26, 2024, 13:48:52 pm »
I will make another live now with the new transformer on the bifilar coil and showing how I’m doing the coils

If you want to make comments will be nice to have a talk with who’s interested…

I will be answering or try to answer your questions

Hope we get somewhere

Stay tune for the time may be around mid day in Brazil

« Last Edit: May 26, 2024, 14:48:04 pm by sebosfato »

Online Login to see usernames

  • Global Moderator
  • Hero member
  • ****
  • Posts: 4181
Re: My new approach
« Reply #474 on: May 26, 2024, 19:06:44 pm »
The transformer works really great

It simply puts out the power now very efficiently

The regenerative snubber worked perfectly with 20nf on it now the snubber itself don’t even get hot

The clamp coil is set to its maximum turns so I can also reduce with the Taps that make the peak caused by the capacitor to be sharper and higher

Here is a drawing of it

I could pulse up to 150w with half the power

And I mean all this goe to the load probably 95% or higher efficient because there was any heat anywhere only the bifilar got hot

So finally with power in hands we can do some magic

I didnt counted the Turns much precisely

But seem I get 1:5 or 1:10 if I connect the secondary in paralllel or series respectively

One thing that is interesting is that if they are in parallle and they are slightly different in voltage one will be acting slightly as a load to the other making some current flow

However its current induce on the other secondary an even higher voltage

It’s a kind of feedback  so actually it should not really consume much power

I think that could do something


There was a 120ohm resistor on the secondary too! So it was probably taking some of the power too during pulse on


Obs on this drawing there is omitted the diode that is in parallel with the igbt (it’s already inside the igbt packed)

I hope you don’t get me wrong but I feel like I found a very important thing that is the coil really need to be make in this way to get power out

When Stan places in his drawing that dual primary coil on fig 6.1 I think he is using it like this or simply as a forwardconverte with a diode like I was doing before … however this way of using it as regenerative snubber seems a much better way to get the real juice on the load and with efficiency

Basically all the power was going out very few magnetizing current with open circuit

That would be because the primary is farther as possible from the core right in the middle of the coil

So the secondary and the chokes get most of it coupling with the core before the primary


Also the choice to use it as CI reduced the unused core length

Now my ideas are to test with some more pure water

Increase the gap on the transformer and see if I can get more juice out of it by reducing its output impedance

And lastly

I’m planing on making some big bifilar coil with that same wire but now on the core and make the primary over it and the secondary shorted on one of the coils to make current flow and I want to see if I can get any restriction of amps and increase in voltage in that configuration


I will probably do in two coils being the bifilar at the bottom belowe the primaries and having a secondary over each coil

So one of the secondaries should be shorted with the bifilar coils and the other pass thru the bifilar other coil and goe to the cell



Maybe a capacitor close the other circuit so it can resonate





« Last Edit: May 26, 2024, 22:23:27 pm by sebosfato »

Online Login to see usernames

  • Global Moderator
  • Hero member
  • ****
  • Posts: 4181
Re: My new approach
« Reply #475 on: May 27, 2024, 14:21:09 pm »
The resistor was Burned so it was not interference so it’s a good news too as at least the Vic burn something now

Today I’m staying the big coils soon I post some photo

Online Login to see usernames

  • Global Moderator
  • Hero member
  • ****
  • Posts: 4181
Re: My new approach
« Reply #476 on: May 28, 2024, 00:16:11 am »
I’m thinking of another experiment to do with this bifilar coil

I will place it with the core and actually pulse with a primary and have a secondary over the primary that will make the current flow thru the bifilar under the primary

And I want to check if water resonance voltage can be increased somehow

When we put water cell in resonance with a coil the coil usually have much higher voltage than the cell I mean applying ac

The voltage of coil normally increases while the cell voltage don’t increase equally

I’m wondering if having a high magnetic field on the bifilar having concurrent currents could cause the electric field to be retarded or kind of compressed by this magnetic field and that perhaps could show up as an effect on water …

I’m just wondering what else those bifilar could be doing there

The point is that if one is used as resonant tank and the other as impedance maybe some unknown effect may come to live

Today I did a tensioner for working with the finer wire 28awg it’s in the end I guess I will know when i measure the resistance and calculate with the length but since it has ,33mm I guess I received the wrong wire

Anyway will work the same but consume little more power for same magnetic field

I build the tensioner using positioning sensors so I could maybe use it to adjust the current of the dc motor automaticaly so I can set the tension as a force number and it track automaticaly

This improvements are needed to get it to work with increasing thinner wire.

I’m now printing some separators for the coil each one takes 46 minutes hope I can make each coil section within this time


I changed filament and finally is printing better again I guess it was a shitty material

Online Login to see usernames

  • Global Moderator
  • Hero member
  • ****
  • Posts: 4181
Re: My new approach
« Reply #477 on: May 28, 2024, 02:08:10 am »
I did 550 turns and the tensioning motor started to fume

It’s a starter motor for high rotation and torque but short time use

I guess I’m frying the graphite contacts

Need to find some stronger motor like this to get the wire tensioned but with lower heat

Maybe the motor could be replaced with an induction motor from a ventilator or pre washing machine

Today I need to find a solution to substitute it because I burned it

I found one similar to sell used for 50 dollars but I’m going to try to find a cheaper one

And also I need to fix this one I burned
« Last Edit: May 28, 2024, 09:46:54 am by sebosfato »

Online Login to see usernames

  • Global Moderator
  • Hero member
  • ****
  • Posts: 4181
Re: My new approach
« Reply #478 on: May 28, 2024, 11:27:13 am »
I fixed the motor problem

It had fry the plastic that hold the graphites contact

I had to clean and make it slide again

The wire in the motor is like 18awg so it won’t burn on that side I guess

It seem now it’s working a little better because I disconnected the button and maybe the graphite contacts with wire  got improved by soldering well

It’s a relief not having to buy other motor… anyway I may need a stronger one to use it pushing lighter


Online Login to see usernames

  • Global Moderator
  • Hero member
  • ****
  • Posts: 4181
Re: My new approach
« Reply #479 on: May 28, 2024, 16:44:36 pm »
After 15 layers I start getting some defects on the coils so I thought a little better and decided to start again but reduce to 10mm wide coils having 1500 turns each

That will reduce the needed voltage to max the fields and will also reduce dramatically the inductance of the coils

They are going to be connected in parallel so I’m thinking to place a sort of conductive plane on the side of the tube and solder the wires on start all together in this copper plane I will need to add some tape over it than start the coils

Another way would’ve winding the coils in opositor direction and connecte them in series but than I would need a 15kv

The best thing would be if the coils could slide in and out but is not easy task

I would need to cut precisely some polyester to make at least one turn below the coils such that hopefully it can slide easier because after coil is ready it will have lot of pressure over it


If it don’t work I will reduce the turns to 20 and the size of the beast and make them in series