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Overunity Machines Forum



Self accelerating reed switch magnet spinner.

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

Previous topic - Next topic

0 Members and 12 Guests are viewing this topic.

conradelektro

In the first version I do not have "base magnets", just a smaller ring magnet on the axis inside a bigger ring magnet on the acrylic support (concentric ring magnets). The ring magnets are of course not touching but the axis is pressing very hard against the glass.

Now I have built a version with two base magnets. This version works much better because the axis is only pressing very slightly against the glass. All ring magnets are facing in the same direction.

See the attached photo.

Bigger ring magnets and a heavier rotor (axis) seem to be better. The ring magnets I use are a bit weak and the 3 mm axis is too light.

One only learns by building something. I always thought that concentric ring magnets are better, but it seems that two base magnets are easier to build and work very well. When I spin the rotor by hand it keeps turning almost a minute.

Greetings, Conrad

synchro1


@Conradelektro,


            I realized I was making a mistake after my last post. Take a look at how Lidmotor handles the wall end of his levitator in the video below. I'm glad you achieved a great success with your latest build, it looks sensational!  


http://www.youtube.com/watch?v=VhKG4LPh3EQ

synchro1

@Conradelektro,


                        The elongated coupled double rings at the base and on the shaft look like a novel innovation to me. I've never seen a permanent magnet pseudo-levitator built that way before. Your unique design may be a vast improvement over the existing approaches. Looks like you accomplished at least double the stability over the simple ring version. Very nice! I really doubt Lidmotor's ball bearing and attracting wall magnet would add anything to it.

conradelektro

Quote from: synchro1 on November 28, 2013, 02:58:04 PM
@Conradelektro,
The elongated coupled double rings at the base and on the shaft look like a novel innovation to me. I've never seen a permanent magnet pseudo-levitator built that way before. Your unique design may be a vast improvement over the existing approaches. Looks like you accomplished at least double the stability over the simple ring version. Very nice! I really doubt Lidmotor's ball bearing and attracting wall magnet would add anything to it.

I had to use two little ring magnets because they are weak. They make a nice impression, but I doubt that they add any advantage.

I have some strong disk magnets (no hole in the middle, just disks with axial magnetisation) which could be used as base magnets. The plan is a 5 mm threaded brass rod as axis with a length of 250 mm carrying five ring magnets (diametrical magnetisation) in the middle and axial magnetised ring magnets at the ends. The strong disk magnets placed flat underneath the ends of the axis should hold up this long and heavy spinner.

I noticed some interaction between the diametrically magnetised ring magnet in the middle and the base magnets on both ends of the axis. A longer axis should help. And attached please find an idea to neutralise the effect of the base magnets on the ring magnet in the middle.

Greetings, Conrad

TinselKoala

It will be interesting to see if the base magnets can be arranged so that the poles are vertical instead of horizontal. I haven't been able to do that. I use thin flat magnets polarized on their faces, very strong, for my base magnets in the electrostatic Mendomotor arrangement, but they have to be oriented so the poles are parallel to the shaft, and all are oriented in the same direction, so that the shaft magnets are repelled to push the shaft very lightly against the glass end-stop.

Lidmotor's magnet point of contact is pretty clever. My shaft is nonconductive, made from a phenolic tube, but I have an aluminum point insert in the bearing end and I could replace this insert with a steel one, and try the magnet suspension idea that way. I don't think it will give less friction than the sharp aluminum point against the glass, but reducing the number of permanent magnets is a plus.

The full-radial suspension with co-axial ring magnets is better for vertical shafts. It's hard to get a vertical shaft to balance and center properly unless you use full rings.