Working Magnetic Motor on you tube??

[CLaNZeR]

Rogowski coil?

LOL

Think you will find they are just Ally bars.

If you notice in the video when spinning the two front Stator Rollers they will make the Rotor spin. The Back Stator Roller does not because of these two bars effecting the magnetic field.

I understand the theory of using it as a restrictor at high end speeds, but my question is whether the dampners are needed for the overall effect.

[Groundloop]

[EDIT] Deleted.

[vipond50]

Howdy Folks
Well all the parts are on order i.e. bearings, mags, etc. Is or has anyone worked up a set of Cad dwg's for this project?
Feel this would be the way to go so all replicators follow the orginal design. Seeing alot of varients, which could be
good, not following the design.
Just need Al to verfiy that the Dwg's are correct.
Who up to the challange?
Comments

Bill

[CLaNZeR]

AL just posted his reply to my question over at the Steorn Forums, great too see someone stick around after releasing a Video for a change, good on him and I feel sorry for the hassle he has been getting

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@Clanzer: let's see--the position of the rotor when starting the mmanual movement of the stators determines how the rotor behaves with a give stator input. If I swivel one of the stators to just the right angle and hold it against the springy field, then rock it back and forth about 15 degrees, and the rotor is in the right phase, I can keep the rotor rotating continuously at about 1 rps or 60 rpm. If the rotor isn't in the right phase or I don't rock at the right instant (same thing) the rotor stops or reverses direction.
So the fact that it didn't rotate for one magnet at the beginning of that hasty video isn't significant, I don't think.
As I have indicated before there is variance in how the individual magnet/bearing pairs behave. The "middle magnet" in the running rig is the smoothest bearing out of the 13 that I have. I can't tell any variation among the magnets by the means at hand (viewing film, guesstimations of pull strength, etc.) but there does seem to be something "sweet" about the one I ended up using.

I think the dampers are working by keeping the bearing wobble down, and by providing a gentle drag force that disappears when the parts are moving slowly. Eddy, Lenz, and all those things.

Without the dampers the unit seems to speed up to instability, the stator chatters and drops out, and the rotor coasts to a stop.

And one more time: 6061-T6 extruded aluminum bar stock, machined to the exact dimensions of the stator magnets (except I really did use a 3/16 hole, the magnets are a bit bigger here), spaced and oriented by trial and error, and in my unit, the pre-drilled holes for the stator magnets seemed close enough to the sweet positions so I just used them.

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[MeggerMan]

Hi Clanzer,
Beautiful build, that should prove to be very adjustable.
It looks very precise and accurate.
I look forward to see your results and I hope to get started on my own build in the next couple of weeks.
I think Al is looking at ways of spinning the stators without getting blisters and also more reliably.
We could do with him coming over to this forum too.
I did suggest using 12v brushless fan motors to drive the stators up to speed.
They are very compact (1" type) but may need connected via a short shaft to avoid magnetic inerference.

Regards
Rob