STEORN DEMO LIVE & STREAM in Dublin, December 15th, 10 AM

[Omnibus]

I think the emf that has been seen by some people when rotating the rotor by hand is caused by the imperfection of the windings. A perfect toroidal coil is a coil that has uniform amounts of windings all the way around and where the windings are as tight together as possible. Any imperfections give rise to local emfs being produced which can be measured.

I also proposed an experiment to show whether that same measured emf has the same amplitude when current is flowing through the system, see:

http://www.overunity.com/index.php?topic=8411.msg217852#msg217852

Basically this will give you a clean result without any interference of the voltage by the battery. As any change in the energized coil will be picked up by the coil hooked to the scope equally.

Very good point.

[captainpecan]

Just dropping a bit of data from my bench work. I have a running replication, but right now current draw it to big so nothing great to report, I have a long way to go. But I did wind my toroids a bit different to try an idea.  I only had small toroids available, a little less than 3/4" I think diameter.  I first wound 150 turns of 30 gauge, then I layed 75 turns of 20 gauge over that.  I would have went with alot more turns but that little hole in the middle gets tight fast.  The idea was to see how using it as a transformer would effect the rotor speed.  It does work well to draw the energy back off the second winding. I do not have a scope, but I could not see a difference at all so far with current draw, or rotor speed when I pulled the energy back from the second winding as oppose to leaving it disconnected. Although I am not alternating pulses either. Still terrible efficiency in my setup, but I am hoping to collect a couple more components today, and try to pulse it with very short, alternating square wave to improve the transformer ability.  I am hoping that since it does not seem to care what polarity of current flows, maybe alternating square will work just as well, and make it double as an efficient transformer also.  If we are able to somehow collect MOST of the energy back that we used to run it, I do not think the amount of current will be as much of a problem, as the heating up should cut down quite a bit. Just thinking out loud.

[Omnibus]

@broli,

To be honest I didn't get how to perform your test.

First, bifillar in my book means a coil with two ends, not four but the wire is first doubled and then wound around the core the way a single wire would be wound. As far as I can see you have in mind a different arrangement. Probably two separate wires wound on the core, first one then the other so that there would be four ends when done.

[broli]

@broli,

To be honest I didn't get how to perform your test.

First, bifillar in my book means a coil with two ends, not four but the wire is first doubled and then wound around the core the way a single wire would be wound. As far as I can see you have in mind a different arrangement. Probably two separate wires wound on the core, first one then the other so that there would be four ends when done.

You are correct, I didn't meant the serial connected bifiliar coil but you wind it as one. Basically I'm saying make a 1:1 transformer. Since most people twist the wires together first to wind a bifillar coil, that process would be advantageous to use as well as you would then be sure you have the exact same number of windings. An emf reading in the secondary winding hooked to the scope, if any, can then be said to be equally as big as the one present in the energized primary coil which is only hooked to the battery.

[broli]

Jnaudin has all the tools he need to very accurately measure mechanically energy without converting it to electricity. By using mechanical formulas. First he needs to figure out the moment of inertia of his rotor. This can be easily found by dropping a weight from his rotor and using photo gates to measure acceleration. Then he measures and stores the value of the changing rpm before it maxes out and stores this data. Afterwards he can use a simple formula to find the instantaneous energy and power by taking the numerical derivation of the angular speed.

I would be glad to do all this if I was allowed in his lab  .