Partnered Output Coils - Free Energy

[tinman]

My take is that the resonant voltage rise due to self resonance (distributed capacitance and inductance) of the unloaded secondary creates an apparent voltage gain, even in a 1:1 transformer, but only if the coupling is less than 100%.

The important thing is that an unloaded voltage gain is not the same as a power gain.

An ordinary transformer with !:2 ratio will exhibit a voltage gain but not a power gain.

In other words, the apparent voltage gain can occur in a 1:1 transformer where there is resonant voltage rise in the secondary. The primary is loaded and kept constant by the function generator's output amplifier, so the reflected rise will not be seen in the primary. Due to less than 100% coupling factor,  the secondary is decoupled enough to be allowed rise in voltage.

When properly loaded, the apparent voltage gain of the secondary should  diminish.

However if this rise occurs over the entire pass band, when loaded, not just at a few specific frequencies, we must look for a different effect.

When properly loaded, the apparent voltage gain of the secondary should  diminish.

I have just posted the open voltage sweeps,and will be doing a loaded sweep video soon.
I will be using 200 ohm resistors as the loads on the two secondaries-->would this be a proper load?. The reason for the 200 ohms is because i am only using my FG to drive the primary,and it is limited on power,and we will have both secondaries with loads across them.

[partzman]

Partzman:

I am sorry but I did not read the paper.  However you state:

I am wondering if this is just due to the normal ramping up of the current when you energize an inductor with a voltage source.  It's perfectly normal for the magnetic domains to be flipping as the miliseconds pass.  We don't want to mix apples and oranges here.  I am not talking at all about the time delay for the current to ramp up when you energize an inductor.  I am saying that the magnetic field strength inside an inductor is instantaneously proportional to the current flowing through the inductor and all talk of vorticies, waves, etc with respect to the magnetic field as measured inside the inductor is bunk.

MileHigh

MH,

The authors in their test I'm referring to actually use a stepped current source of 180ma into the primary of the transformer under test instead of a voltage source.  Again I would encourage you to read the paper and note the diffusion of flux into the core over time plus the rapid developing H field between the core limbs. 

partzman

[picowatt]

Here is the video on the frequency sweeps.
I split the sweeps up into various ranges,so as i wasnt chasing the time base all over the place.
Hope it was done right.

https://www.youtube.com/watch?v=bmmk80yysNY

Tinman,

Why did you stop the sweep at 500KHz?  It looked like the outer secondary's amplitude was beginning to rise and then you stopped the sweep.

Also, it would have been much easier to follow this video if you had set both scope channel sensitivities to 5V/div and just left them there throughout the video.

In lieu of having to make another video continuing the sweep to a higher frequency, you previously said that you swept the response up to 2.3MHz.  Did you observe a peak in the response of the outer secondary during that sweep?

PW

[tinman]

Tinman,





In lieu of having to make another video continuing the sweep to a higher frequency, you previously said that you swept the response up to 2.3MHz.  Did you observe a peak in the response of the outer secondary during that sweep?

PW

Why did you stop the sweep at 500KHz?  It looked like the outer secondary's amplitude was beginning to rise and then you stopped the sweep.

Post 5913
Quote:
To better understand what is going on with your xfmr, consider doing a sine sweep from 1KHz to 400KHz or so.

Also, it would have been much easier to follow this video if you had set both scope channel sensitivities to 5V/div and just left them there throughout the video.

OK-you know what-->im done here.

Thanks for all your help guy's,but it seems one can never get things right-even when following suggestions.

Cheers and good luck.

Brad

[picowatt]

Post 5913
Quote:
To better understand what is going on with your xfmr, consider doing a sine sweep from 1KHz to 400KHz or so.

OK-you know what-->im done here.

Thanks for all your help guy's,but it seems one can never get things right-even when following suggestions.

Cheers and good luck.

Brad

Tinman,

In more recent posts I stated that you will have to go higher in frequency.  I also explained that it was the response peaks and roll offs that were of interest and that you may need to go to 1MHz or higher. 

As for getting ticked off due to a scope operation suggestion, I do not know what to say.  It was an amplitude response sweep.  If you chase the amplitude response by changing the channel sensitivities during the sweep it is more difficult to follow. 

Again, I was only trying to be helpful.

PW