Author Topic: Resonance WFC  (Read 47940 times)

0 Members and 5 Guests are viewing this topic.

Offline Login to see usernames

  • Hero member
  • ****
  • Posts: 980
Re: Resonance WFC
« Reply #56 on: February 06, 2011, 23:08:01 pm »
the circuit you are building is for the 3-23 vic, i tried to make this vic, but i didn't match things, and i didn't have a decent circuit to pulse it... i will try again after i build some other things, but we have a close up picture of stans 3-23 vic from dynodon now, so i would try and make it as close to that as possible, the C1 C2 and Sec are all the same, and all the coils use the same wire size, i am sure there are some details to the design of this coil that require some careful consideration, i am sure your simulations will help you there too

Offline Login to see usernames

  • Moderator
  • Sr. member
  • ***
  • Posts: 434
Re: Resonance WFC
« Reply #57 on: February 13, 2011, 18:03:12 pm »
the circuit you are building is for the 3-23 vic, i tried to make this vic, but i didn't match things, and i didn't have a decent circuit to pulse it... i will try again after i build some other things, but we have a close up picture of stans 3-23 vic from dynodon now, so i would try and make it as close to that as possible, the C1 C2 and Sec are all the same, and all the coils use the same wire size, i am sure there are some details to the design of this coil that require some careful consideration, i am sure your simulations will help you there too
Found a interesting book about pulse forming networks.
(the PFN and charging choke are designed so that their combined impedance matches the output load as nearly as possible when the network is switched. The output line therefore appears as an infinity long transmission line when the switch is closed).

http://babel.hathitrust.org/cgi/pt?seq=458&view=image&size=100&id=uc1.b251410&u=1&num=436

Also a patent, how to make laminated core for a transformer.

I measured stans 3-23 vic with help of the db9 serial connector (estimate values).

br,
Webmug
« Last Edit: February 19, 2011, 14:37:25 pm by webmug »

Offline Login to see usernames

  • Moderator
  • Sr. member
  • ***
  • Posts: 434
Re: Resonance WFC
« Reply #58 on: February 18, 2011, 15:01:10 pm »
Different Resonance Cell VIC simulation in LTspice...
If you have a LTspice transformer model with core material that would be great to put it here!
Primary, Secondary, Choke 1 and Choke 2 are coupled.

br,
Webmug

Offline Login to see usernames

  • Global Moderator
  • Hero member
  • ****
  • Posts: 3607
Re: Resonance WFC
« Reply #59 on: February 18, 2011, 15:31:30 pm »
Nice simulator! Thanks a lot man.

Offline Login to see usernames

  • Moderator
  • Sr. member
  • ***
  • Posts: 434
Re: Resonance WFC
« Reply #60 on: February 18, 2011, 17:23:29 pm »
Found interesting fact about the chokes.
Choke 1 and 2 are not identical!
What Stan shows us in his schematic we see a adjustable choke 2 (wiper arm?).
Why is shown in my screen shot below. If chokes are doing something of equal voltage potential to the wfc cell they must be different...
When we alter a choke inductance the resistance is also changed, so voltage potential too. Choke 1 and 2 are matched to voltage potential (see below). Don't know what happens when blocking diode is added in circuit?

That's why Stan has adjustable Choke 2. (equal and opposite voltage)
You can see the step-up and charging choke strengthen the input signal.

More to learn...

Update:
More precise plot (frequency response) of coils on resonance (not pulsed) L1 and L2 overlapped.
Depends on inductance and resistance of coils and water!

br,
Webmug
« Last Edit: February 18, 2011, 19:30:47 pm by webmug »

Offline Login to see usernames

  • Hero member
  • ****
  • Posts: 980
Re: Resonance WFC
« Reply #61 on: February 19, 2011, 07:09:23 am »
you get an overlapping frequency response with different choke parameters?

*thinks*

Offline Login to see usernames

  • Moderator
  • Sr. member
  • ***
  • Posts: 434
Re: Resonance WFC
« Reply #62 on: February 19, 2011, 14:58:42 pm »
you get an overlapping frequency response with different choke parameters?

*thinks*
Yes, that's just what we see in the picture. It doesn't make sense... 8)
Stan adjusted the choke2 (fine tuned potential) (why did he adjust choke2, which factor determents choke2 become different?)
The two chokes have (almost?) the same wire length and resistance.
He calls it Dual in line RC network. Chokes are pulsing on the same core.

br,
Webmug

Offline Login to see usernames

  • Sr. member
  • ***
  • Posts: 363
Re: Resonance WFC
« Reply #63 on: February 19, 2011, 16:22:43 pm »
In my recent test,I have found that the positive choke is the only one that part of the LC resonance.The negative choke has no effect on the frequency for resonance.I added a capacitor across the chokes in parellel,as well as the cell,and found out that the frequency for resonance would change when put across the positive choke and the cell,but not the negative choke.The test was done using only one capacitor across one item only.
 
Putting the extra cap across the negative choke had no effect on the resonance frequency.So that leads me to believe that the negative choke has no effect on LC resonance.
Don