Transformer connected to a shorted delay line

[Smudge]

I have started this topic in the hope that someone will take on the challenge of investigating this possibility.  Below is the paper I have just written showing that a delay line shorted at its far end connected across the secondary of a transformer offers OU performance.  That analysis used a 50 ohm delay line with a one-way delay of 7.5 uS which would be about 2000 meters of coax.  A more sensible approach is to build your own lumped constant delay line with a series of inductors and capacitors.  And build your own toroidal transformer using a ring core.  Any takers?

Smudge   

[Verpies]

Shouldn't the reflected pulse look like this ?


...not drawn to scale.

[Smudge]

Shouldn't the reflected pulse look like this ?
...not drawn to scale.

Not from my knowledge of delay lines, I stand by my interpretation.  But even if yours is correct that 2 amp value arriving back at the secondary when the primary current is 2 amp will drive the flux to zero and return all the input energy.  Leaving the delay line storing energy, it is still OU.

Edit.  And if you are correct the reflected positive current of 2 amp along with your reflected negative 50V represents an instantaneous negative resistance!!!!

[Verpies]

Not from my knowledge of delay lines,

Watch this video to see what happens to the polarity of the reflected pulse as the terminating resistance at the far end of the coaxial cable is adjusted below its characteristic impedance.

Edit.  And if you are correct the reflected positive current of 2 amp along with your reflected negative 50V represents an instantaneous negative resistance!!!!

You'd be correct if I drew it to scale.

Anyway, you are not accounting for the load energy represented by the secondary current.

[chief kolbacict]

Is it possible to reduce physical length of your delay line during of going pulse ?
It is impossible to change the physical length in such a short time, but it is possible to change its delay time by changing its parametric elements by varicaps e.g.. I think this.

[Verpies]

Is it possible to reduce physical length of your delay line during of going pulse ?

Yes, just short it somewhere else (e.g. midway) with a MOSFET.

[Smudge]

Watch this video to see what happens to the polarity of the reflected pulse as the terminating resistance at the far end of the coaxial cable is adjusted below its characteristic impedance.

That is for a pulse whose width is significantly less than the delay time which doesn't apply to my scheme.  I stand by my interpretation for a pulse width that is controlled to be slightly greater than twice the delay time.

Smudge

[Atti]

"I have started this topic in the hope that someone will take on the challenge of investigating this possibility. "

Energy reflection.
I don't want to mislead the idea or the topic. But years ago, I thought similarly and conducted some experiments.
I examined transformers excited not by impulse but by alternating polarity voltage.


You can see the information here.  :     
https://www.youtube.com/watch?v=sk_7MFYo7io

The description contains the results of the previous experiment.
If I am wrong or my comment is irrelevant, please ignore this comment.

Thank you. Atti.

[Smudge]

"I have started this topic in the hope that someone will take on the challenge of investigating this possibility. "

Energy reflection.
I don't want to mislead the idea or the topic. But years ago, I thought similarly and conducted some experiments.
I examined transformers excited not by impulse but by alternating polarity voltage.


You can see the information here.  :     
https://www.youtube.com/watch?v=sk_7MFYo7io

The description contains the results of the previous experiment.
If I am wrong or my comment is irrelevant, please ignore this comment.

Thank you. Atti.

I am sorry but that video with no voiceover description of what is going on tells me nothing.  Impressive work though and I envy your equipment and facilities.
Smudge   

[Smudge]

Where does the energy come from?
In power transformers, when dealing with efficiency or COP, there is an implied assumption that the output energy must come directly from the input energy.  That is not quite correct, the output energy comes from the flipping of the atomic magnetic dipoles within the ferromagnetic core.  If these dipoles were magnets that we rotated, that movement would require input mechanical energy due to forces on the magnet in the magnetic field from current in the secondary, classical generator action.  The fact that the way a transformer works eliminates that secondary field while at the same time forcing the primary to demand the current to do that elimination, does not detract from the output source being those dipole flips.  Once we train our minds to think of ferromagnetic material as an array of magnets that can be manipulated into giving out a series of energy pulses, we can ask is there any way that manipulation can occur without the primary input supplying that energy?  One answer could be to devise a scheme where the primary supplies the pulse in normal transformer action up to where the magnets have flipped but then arrange that the reverse flips back to their normal state returns that quantity of energy to the primary.  There doesn't seem to be a law of Nature that says this can't be done, and this is precisely what happens in this delay line scheme.

Smudge

[chief kolbacict]

Is there such a thing as negative wave resistance  ?