Author Topic: Resonance WFC measurements  (Read 36839 times)

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Re: Resonance WFC measurements
« Reply #16 on: March 18, 2011, 13:23:27 pm »
Update: I did a few measurements.
First one was on a toroid 230V to 12V transformer 60VA in reverse. I DC pulsed the 12V side (0V=OFF 12V=ON) and measured the output @230V side.
This signal was PULSED going positive to negative and back @ 50% duty cycle.

My VIC coils primary and secondary doesn't give the same signal as the toroid when PULSED, no PULSE output.
When I found the resonance frequency of the VIC coil it was AC. On the toroid I couldn't find resonance, only PULSE.

I connected the toroid to the blocking diode, chokes and wfc.
I noticed a few thing when I started GATING the PULSE signal on the toroid transformer.
When the GATE duty cycle was small I started to see offset to almost DC PULSE on POS+ and NEG- at the 230V coil.

I tell you guys, it's the core material that gives PULSE as a PULSE transformer and the resistance of the chokes to get step-charge.
The step-charge isn't high enough due the few windings on the transformer. Total current was 10mA on the primary.

Problem I now have is that I don't have negative signal in this set-up due I don't have the chokes on one core, so more to solve.
(http://www.ionizationx.com/index.php?topic=1305.msg19005#msg19005)

@Donaldwfc, could you measure the output of the transformer made by Brian, to see if it's PULSED?

br,
Webmug
« Last Edit: March 18, 2011, 15:51:28 pm by webmug »

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Re: Resonance WFC measurements
« Reply #17 on: May 16, 2011, 15:40:24 pm »
Update:
Finally I got my coil 'values' the way I want them to be on a core 8) (measurement f=1kHz)

I used laminated metal plates for the core (15 x 13mm).
Stan used a very thin core. I would like to know what kind of ferrite type core it was to get those values!

When the primary is pulsed the signal at the secondary coil should also be pulsed (impulses) and stepped-up and I don't see pulses with my core. Instead I see AC signal when in resonance (Cpp and L). When pulsed the Sec coil should not go in resonance in 1Hz to about 15kHz range.
Pulses should go through the diode into the choke to the WFC. That's the PULSE TRANSFORMER what Stan talks about.

Any ideas?

Br,
Webmug
« Last Edit: May 16, 2011, 18:40:25 pm by webmug »

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Re: Resonance WFC measurements
« Reply #18 on: May 16, 2011, 19:07:51 pm »
nice vic!
i'm getting an ac signals as well,
 

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Re: Resonance WFC measurements
« Reply #19 on: May 17, 2011, 12:12:50 pm »
nice vic!
i'm getting an ac signals as well,
Interesting!
What kind of wire are you using, enameled copper wire or enameled aluminum wire.
I'm using enameled copper wire on laminated plates core.

Ferrite Manganese Zinc (Mn-Zn) or Nickel Zinc (Ni-Zn) core?
Can not see what kind of material it is on Don his photos of the VIC.

Br,
Webmug

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Re: Resonance WFC measurements
« Reply #20 on: May 18, 2011, 02:06:37 am »
I'm using copper, with the same kind of core material as you, but i'm about ready to start on my new vic.
Don said the core Stan used looked like hard ferrite, so since he used between 0 and 10 khz that would mean he was most likely using a Manganese Zinc ferrite, having permeability’s above 1000. 
 
Anyway, right now i'm getting an ac signal at resonance with 1000 volts across the cell. If I move out of resonance to a different frequency range I read a pulsing signal that switches between 0 volts and around 200 volts. I want to look into this further.
 
what kind of voltage are you getting with your vic?
 
here is a picture of my cores and bobbins

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Re: Resonance WFC measurements
« Reply #21 on: May 18, 2011, 21:19:23 pm »
I'm using copper, with the same kind of core material as you, but i'm about ready to start on my new vic.
Don said the core Stan used looked like hard ferrite, so since he used between 0 and 10 khz that would mean he was most likely using a Manganese Zinc ferrite, having permeability’s above 1000. 
 
Anyway, right now i'm getting an ac signal at resonance with 1000 volts across the cell. If I move out of resonance to a different frequency range I read a pulsing signal that switches between 0 volts and around 200 volts. I want to look into this further.
 
what kind of voltage are you getting with your vic?
 
here is a picture of my cores and bobbins
Isn't hard ferrite used for permanent magnets? If that core was a magnet it would be useless for pulse signals or not?

Soft ferrite: "The low coercivity means the material's magnetization can easily reverse direction without dissipating much energy"
Hard ferrite: "high coercivity and high remanence after magnetization"
http://en.wikipedia.org/wiki/Ferrite_%28magnet%29

Br,
Webmug

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Re: Resonance WFC measurements
« Reply #22 on: May 19, 2011, 22:57:49 pm »
Don did say it looked like hard ferrite, but I agree, thats why i'm using a soft ferrite.
 
 

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Re: Resonance WFC measurements
« Reply #23 on: May 22, 2011, 11:28:29 am »
I'm using copper, with the same kind of core material as you, but i'm about ready to start on my new vic.
Don said the core Stan used looked like hard ferrite, so since he used between 0 and 10 khz that would mean he was most likely using a Manganese Zinc ferrite, having permeability’s above 1000. 
 
Anyway, right now i'm getting an ac signal at resonance with 1000 volts across the cell. If I move out of resonance to a different frequency range I read a pulsing signal that switches between 0 volts and around 200 volts. I want to look into this further.
 
what kind of voltage are you getting with your vic?
 
here is a picture of my cores and bobbins
Isn't hard ferrite used for permanent magnets? If that core was a magnet it would be useless for pulse signals or not?

Soft ferrite: "The low coercivity means the material's magnetization can easily reverse direction without dissipating much energy"
Hard ferrite: "high coercivity and high remanence after magnetization"
http://en.wikipedia.org/wiki/Ferrite_%28magnet%29

Br,
Webmug


Webmug,

Using a magnet for core is possible.
Only if your coils are producing a greater magneticfield then the magnet.
That way you will notice a change in the magnetic field and my theory is that that also is doing something.
For Meyer cores, i would suggest to stay at cores that fits the frequency, raise and fall times.

Steve