Re: Aw: Re: AW: Re: [EVGRAY] Low Lenz in plain sight

Body

Hi Sven,

Here is a video showing ferroresonance in a circuit consisting of several inductors and capacitors:
Ferroresonance and AM-FM: https://www.youtube.com/watch?v=naJkLzGEXcI https://www.youtube.com/watch?v=naJkLzGEXcI

Having several components makes it possible to have several modes of oscillations just like if a transformer in the grid drops its inductance and becomes ferroresonant. This may start ringing at several different frequencies. The drop in inductance can be a very fast phenomena and is like hitting the circuit with a hammer to make it ring. Waves returning from different parts of the circuit may cause the inductance to drop at different periods in time and thus sustain the ferroresonant oscillations. On the grid with power plants supplying the energy the transformer may explode when the current isn't interrupted or limited.

In the video there is a resistor between the generator (amplifier) and the ferroresonant circuit. This will limit the amount of power to a safe level. When a transformer is supplied directly from the grid and its impedance drops to only the Ohmic resistance of the winding (plus the inductance of the primary becoming like an air core) the current will become very great and make everything in the vicinity ring at their resonant frequencies. This must be avoided in a public grid as the destruction of equipment can be expensive.

The following video shows spurious ringing when the core saturates:
Resonans in ferrite core. HD version: https://www.youtube.com/watch?v=Z2vrfyqmYvU https://www.youtube.com/watch?v=Z2vrfyqmYvU.
 
This gives a more random signal even though the input signal is fixed. The high voltage peaks could destroy other circuits that were powered by the same input signal. This is why ferroresonance is avoided on the grid.

Regards
Ole
 

---In [email protected], <s.friedrich@...> wrote :

 Hello Norman,

Maybe we'll continue, I've filmed both transformers in resonance you hear the sound once from the original FR transformer and once as I try several times to bring the three-phase transformer in resonance then works the same as a FR transformer only with the large Magnetic shunt in leg B.

Sometimes I feel like the noise you hear is different. Of course I can drive the transformer with even more capacity but the iron core gets very hot and only the current increases. The voltage remains constant.

I just want to create this phenomenon with minimal input power, I think with simple sine wave AC of 50Hz this will not work.
That's why I'm working on a freely adjustable square-wave control with high-performance mosfets that works trouble-free.

 I once made a 2 videos of my transformers.

 

 https://youtu.be/vNDTM6sBY0w https://youtu.be/vNDTM6sBY0w
 

 https://www.youtube.com/watch?v=tN02vwf2ABE https://www.youtube.com/watch?v=tN02vwf2ABE

 

 

regards

Sven