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Overunity Machines Forum



Shorting coil gives back more power

Started by romerouk, February 18, 2011, 09:51:45 PM

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0 Members and 3 Guests are viewing this topic.

forest

What is the input current ? if input power is below 4Watts then self-runner is possible imho

romerouk

Test with measurements.
Shorting the coil seems that is not affecting the speed or the power used to drive the rotor.
I am working to replace the reed with mosfets and a hall sensor.


http://www.youtube.com/watch?v=33IQaN-M27U

dekoratör

Hi everyone, I just did a little experiment.
This tool is very beautiful. but it does not work itself. only a very low amps and high voltage.  you can try to charge a(220 uf 400volt) cap takes a long time ...
  Connect the battery to drive the output of coil with diodes.

then follow with a voltmeter voltage falls.

nevertheless romrouk friend thank you very much for sharing.

I wish you success in your work ...
(sorry my bad english..(google translate)) :-)
best regards ...

dekoratör

perhaps the same as the inverter is running...

gyulasun

Hi Conrad,

If I may chime in, here is a video from which you can get some explanation:
http://www.youtube.com/watch?v=QRyKVU6YzYw

So shorting (not shortening) a coil means just bridging the two wire ends of a coil together at will with a piece of wire (i-e- with a reed switch or with a MOSFET etc), when the induced voltage in it is just at its peak values (both at the positive and the negative peaks).

When you use an air coil then you surely have a much lower coil inductance than in case of a soft iron cored coil. Hence the voltage spike should surely be lower versus a iron cored coil. (Normal induction law.)

I think the higher L you use with the lowest copper resistance, the bigger kick you get back from the coil after the shorting moment. This means multiturn coils wound with thick wire. I think coils made for audio cross-over filters are a good example for higher L and less ohmic losses, especially, if you deliberately use soft iron core in them.  ;)

rgds,  Gyula


Quote from: conradelektro on February 24, 2011, 05:35:37 PM
Hello Laurent,

the experiment in your video http://www.youtube.com/watch?v=wB9wxySoBQE is just amazing (lightning the white 3 Volt LED with such low speed). I would like to replicate it (because I have a rotor with four magnets sitting in my work shop). But I do not understand your circuit. The most simple circuits are hardest to understand without a diagram (at least I am such a dummy). Specially I do not get what you mean by "shortening the coil"? Do you permanently connect a wire somewhere in the circuit?

I would like to ask you to make a very crude hand drawing of your circuit (used in the video) and to post it here (a photo or as a video). Your experiment is very important for understanding what is going on, because it looks so simple and easy to replicate. You seem to have come up with the most simple demonstration of this incredible effect.

I wounder what happens when you use an air coil? Because the rotor should loose much less speed (less cogging) than with the coil (having a core) you are showing in the video. But may be the induction is then too little?

Greetings, Conrad