Currents in shorted coils

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  • Last Post 17 December 2018
Vidura posted this 14 December 2018

In this thread i will post some experiments related to the currents induced in shorted coils.
As a first test in response to the video from YT channel ismael342, which was posted by MrBlobby, the title is:

Barbosa y Leal primera incógnita , primera prueba

I have made a few short tests with a 50W of the shelf transformer with secondary removed. The primary is connected to 230v poweroutlet thru a 1 ohm currentsense resistor.Here the results:

the upper trace is the voltage induced in open circuit(50mV/div), the sineshaped trace  is the input voltage , the triangle shaped input current(100mA/div)

As in my Transformer the inputcurrent is only about 30ma, the induced current is much lower as in the video shown using a MOT , which drawed 2.7 A at the input. When I connected the scope on the secondary in open circuit it showed a small voltage around 10mV in phase with the inputvoltage. I guess the effect could be produced by Fluxleakage , as the wire is very thick gauge a minimal induced voltage would give arise to a huge current.
I still did not came to any conclusion if this currents, or asociated magnetic fields could be used for any practical implementation.If it could be harnessed without loading the source it might be possible.

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Chris posted this 14 December 2018

Excellent experiment Vidura!

May I ask, if you had to bullet point your key points that you have learned, what would they be?

Thank you for sharing! All work is very important!

   Chris

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Chris posted this 14 December 2018

Hey Vidura,

In every Transformer, the Magnetic Flux Φ or sometimes φ, which translates to Phi, is mostly contained in the core. What is left behind is a Field called the Magnetic A Vector Potential.

The Magnetic A Vector potential is described in detail in the attached pdf document. It looks like the following:

 

The Magnetic A Vector Potential is a very interesting Field to study. It is a Force Field, and it obeys the Inverse Square Law. What is it? It is a wake, like a Boat leaves a wake, like a bullet leaves a wake:

 

 

Magnetism is a by product of the Current, the Current, very fast moving Charged Particles! In some Coaxial Cables, the Signal is approximately 78.18% of the Speed of Light. Current is always only just behind the Voltage... We saw, in our Thread: Impulse Pressure Wave, exactly this! Again we see this in the Following Video:

 

Right there, The Fluidic Aether!

NOTE: The Bullet can be thought of as the Fast Moving Charged Particle! The Shock Waves, are the Magnetism, a by product of the Velocity of the Charged Particle.

Also NOTE: A stationary Charged Particle has Zero associated Magnetic Field, the Charged Particle has to have Velocity, be moving!

Magnetism is directly proportional to the Current, in other words, the more the Current, the more the Shock Waves, or Magnetic Field. Concentric Rings are an Artefact of bad Experiment, as when Iron Filings become Magnetised, they in-fact change the underlying Conditions of the Experiment!

 

Ref: youtube   /watch?v=c53hozdkpno

 

After all, what's the Cross Section of a Cone?

 

 

 

Current is 90 Degrees to the Magnetic Field, in which direction are Magnetic Particles ( Iron Filings / Compass ) going to align?

The Lorentz Force is the Inertial Turbulence, drive your car behind a Truck and get pulled along, drive past it and feel the push away from it! 

Concentric Rings my goodness, BAD Science!..

There you have it, we have solved one riddle in Science!

 

We have our answer. Fast moving Charged particles produce Fields, it is the wake, the Field is of the Aether. All these Fields are the result of Velocity, and the Charges on the Charges Particle.

So, outside a Trans former, we have the same Changing Magnetic A Vector potential as we do inside. Less intensity on the outside, as we are further away, the inverse Square Law, but it is there.

   Chris

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Vidura posted this 14 December 2018

thanks,Chris, great info the document from Feynman, I will study it.sure it will help me for a deeper understanding of the A vector potential.

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Vidura posted this 14 December 2018

Regarding Your question about most important things I think I've leared on the forum , it is certainly about electromagnetic induction, and also the understanding of timing current vs. voltage and properties of EM waves.

Regards Vidura

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mrblobby posted this 14 December 2018

Hi Vidura, are you going to try a direct copy of the demonstration in the video?

i.e. using a MOT and a SINGLE loop around the transformer rather than a coil?
I wish I had all the equipment here to attempt these tests myself.

 

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Vidura posted this 14 December 2018

MrBlobby, I wanted to try the principles more than an exact replication, also I didn't have a MOT at hand this moment, wirh a single loop the current was very small, due to the small power of my transformer, but I will test with a big one from a welding machine soon, for comparison. It is fine if you want to try some experiments, you can start very simple, without expensive equipment, some meters , and materials from scratch also can lead to interesting discoveries. Regards Vidura.

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Vidura posted this 17 December 2018

Here is another test in which I have used an fluorescent tube ballast on which i have wrapped around 300 turns of 0.5 mm magnetic wire in perpendicular position to the inductor winding.

As this ballasts are made to connect in series with the heating filament of the tubes I used a 150w incandescent bulb to limit the current. In this test i didn't get a current measurement with the hall effect clamp meter, neither using a thicker wire, but I got an interesting effect when I tested the open circuit voltage.

There can be observed in first place a frequency multiplying effect, which is said to be present in Paraformers with laminated silicone steel core. The second observation is the area with many spikes in the wave , which can be attributed to the Barkhausen effect(flipping of the magnetic domains). It is in the area of peak currents= peak of magnetic field.

I will pick up this device later for the transformer thread.

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