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Overunity Machines Forum



Self accelerating reed switch magnet spinner.

Started by synchro1, September 30, 2013, 01:47:45 PM

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synchro1


synchro1


Here's a fully assembled unit for $55. This one has buttons to raise and lower the levitator magnet sphere!



http://zeltom.com/products/magneticlevitation

conradelektro

I like levitation, but at the moment I want to build a "ring magnet spinner" which uses as little electric energy as possible. The levitation circuit will use some electric energy and therefore I want to avoid it at the moment.

In case one is not so much interested in "little energy" the levitation of a spinner is a very good way to avoid friction and I am glad I now have some good examples which one could replicate.

My line of "research" at the moment:

1) Build a ring magnet spinner which uses very little electric energy (below 10 mW if possible). I want to spin only one diametrically magnetised ring manet, which I consider the minimum build.

2) Try to recover some electric energy from the rapidly spinning ring magnet by help of strange coils (Rodin coil, pancake coil, ...).

3) Compare the "electric energy spent for spinning the ring magnet" and the "electric energy recovered from the spinning ring magnet".

For all the clever ones out there: I know that conventional science says that one has to spend more energy than one can ever recover.

I saw many ring magnet spinners in the forums and on YouTube and I want to get an understanding of their minimum and exact power requirements.  And I want to do good measurements of a possible energy feedback. I am inspired by the many "spinners" and "pancake coils" built by Skycollection (very beautiful contraptions), but he never did good measurements (neither input to the spinners nor output from his pancake type coils). Unfortunately Skycollection recently erased his videos from YouTube.

Most probable this is all for nothing, but I like ring magnet spinners.

Greetings, Conrad

TinselKoala

One of the levitation systems from one of synchro's links is really different, patent-protected. It uses very little power to levitate relatively heavy loads, by taking advantage of the attraction of permanent magnets! It is almost an actual case of permanent magnets doing work. Almost.

The usual levitation system senses the object's position and then simply switches or modulates the electromagnet, to make a field that keeps the object lifted up against gravity. So all the lifting force comes from the power fed to the coil, and if the power goes off the object drops and falls away.

This unique system uses a strong permanent magnet in addition to an electromagnet, to lift the object. The electromagnet modulates the field of the strong permanent magnet, making it stronger or weaker as required to keep the lifted object at the same height against gravity. This requires very little power into the electromagnet! The actual "lifting" is done by the field of the permanent magnet. If the power goes off the object is pulled up to the permanent magnet and sticks there! It's even possible to relaunch and levitate from this "parked" position when power comes back on. All with much less power than is used by the ordinary system's electromagnet.

http://www.coilgun.info/lev_visual/home.htm


conradelektro

A lot of levitation ideas on this site http://www.coilgun.info/levitation/home.htm (Thank you TinselKoala for the reference.)

My vertical spinner does not work properly. The axis would need some guidance at the lower end, it tries to escape from the coils. I put some guide at the lower end and it spins but of course the "guide" causes terrible friction. Some needle bearing at the ground end and some magnet stabilisation at the top end would do it. But I do not want to go down that route at the moment.

I will build a 250 mm long and 3 mm diameter horizontal axis, with magnet bearings at both ends (base magnets), and the nice strong magnet (diametrically magnetised) from the non-working vertical model as a spinner (in the middle of the axis). The length of the axis should reduce the interference of the spinning magnet with the magnets of the magnet bearings at both ends of the axis.

My tests and models so far suggest that I need somewhere around 10 mW to spin a ring magnet spinner nicely (3000 rpm or a bit faster).

I also see now that a needle bearing with a magnet as a stabilizer at the top of the axis (as I did in this little motor http://www.youtube.com/watch?v=OqQSJjRJ6EQ ) is the most simple low friction bearing one can build at home. The self made magnet bearings (base magnets) are not without drawbacks (little stability, interference with a central magnet on the axis).

Greetings, Conrad

P.S.: It is easy to talk, but much more time consuming and not so easy to build something.