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Author Topic: Working Magnetic Motor on you tube??  (Read 1328967 times)

Dansway

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Re: Working Magnetic Motor on you tube!!!
« Reply #105 on: January 06, 2008, 09:51:53 PM »
I understand everyone's excitement and the rush to build something with what-is-at-hand, but we NEED to use the "SAME" magnets and geometry as the original device!

Then convince yourself of it working or not.

Dan


CLaNZeR

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Re: Working Magnetic Motor on you tube!!!
« Reply #106 on: January 06, 2008, 09:56:00 PM »

I am still very sceptical :)

I tried reversing the spinning magnet but I can't find any resonance, I even tried to speed it up in reverse direction with a DC motor...

If you convince me I will build a larger more stable one :)

In the original Video from AL he has 3 stator magnets.
2 at the front are left alone to spin and be influenced by the Rotor.
What he then does is spin the Stator at the back the opposite direction, the stator keeps moving the same way as do the two front stator magnets. When the back Stator has sync'd with the Rotor it seems to hold a steady RPM and then by releasing the breaking effect of the two front stator magnets, the Rotor accelerates to over twice the speed.

It is good to be sceptical, but at the same time too try and copy how he achieves the effect.
At the moment you just have 1 stator. If you spin your rotor you seeing it turns the first stator, now spin the rotor and spin your stator the same direction, see the difference it has? Now add a couple more and play :)

On your Rotor do you have the Magnets SS-NN-SS-NN etc etc


TheOne

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Re: Working Magnetic Motor on you tube!!!
« Reply #107 on: January 06, 2008, 10:00:15 PM »
Ok my replication is not working well, my problem is my rotor use 6 magnets and this completely change the interaction between the 8 vs 13 original wheel. 6 vs 13 is not working

I will wait to see what will append with our friends with better replication.

Unless I know the amount of holes needed for the stator magnets with a 6 magnets rotor.

Also the sphere is working but they are vibrating to much in the tube I use and 3 of them is to much, to much noise.. and its hard to move the rotor in my configuration.


TheOne

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Re: Working Magnetic Motor on you tube!!!
« Reply #108 on: January 06, 2008, 10:02:54 PM »
I found another version of the video with no dark spot

http://www.youtube.com/watch?v=-7fh2RP_uEs&NR=1

He increased the brigthness of the original video

rburley

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Re: Working Magnetic Motor on you tube!!!
« Reply #109 on: January 06, 2008, 10:06:53 PM »
Hi can some one give me the web site of a suppler of magnets this is in the UK
All the Best Roger

TheOne

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Re: Working Magnetic Motor on you tube!!!
« Reply #110 on: January 06, 2008, 10:09:54 PM »
With this new video version I posted in my previous post

in the video at aprox 0:38 he show this (circle in the image)
he tell its 2 magneto kinetic Jetson damper?

What is that!!

naklaw

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Re: Working Magnetic Motor on you tube!!!
« Reply #111 on: January 06, 2008, 10:13:35 PM »
In the original Video from AL he has 3 stator magnets.
2 at the front are left alone to spin and be influenced by the Rotor.
What he then does is spin the Stator at the back the opposite direction, the stator keeps moving the same way as do the two front stator magnets. When the back Stator has sync'd with the Rotor it seems to hold a steady RPM and then by releasing the breaking effect of the two front stator magnets, the Rotor accelerates to over twice the speed.

It is good to be sceptical, but at the same time too try and copy how he achieves the effect.
At the moment you just have 1 stator. If you spin your rotor you seeing it turns the first stator, now spin the rotor and spin your stator the same direction, see the difference it has? Now add a couple more and play :)

On your Rotor do you have the Magnets SS-NN-SS-NN etc etc

I will buy smaller bearings tomorrow. As can be seen on my pictures, the board has place for three stators, I will try this with the smaller bearings.

Yes, they are mounted SS-NN-SS-NN etc

My stators will be separated by 120 degrees... I don't know any of the parameters/dimensions of the original device :(

Should the stators have a larger inertial mass? My current stator has only a few grams of mass.

naklaw

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Re: Working Magnetic Motor on you tube!!!
« Reply #112 on: January 06, 2008, 10:16:09 PM »
With this new video version I posted in my previous post

in the video at aprox 0:38 he show this (circle in the image)
he tell its 2 magneto kinetic Jetson damper?

What is that!!

"The variant in the video uses the magnokinetic Judson dampers to achieve the same effect of retarding the stator magnet at the critical instant"

"the magneto kinetic Judson Dampers keep the stator magnet at 5000 RPM"

TheOne

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Re: Working Magnetic Motor on you tube!!!
« Reply #113 on: January 06, 2008, 10:21:11 PM »
With this new video version I posted in my previous post

in the video at aprox 0:38 he show this (circle in the image)
he tell its 2 magneto kinetic Jetson damper?

What is that!!

"The variant in the video uses the magnokinetic Judson dampers to achieve the same effect of retarding the stator magnet at the critical instant"

"the magneto kinetic Judson Dampers keep the stator magnet at 5000 RPM"

To achieve the same effect like the 2 stators he stop at the middle of the video?

tbest

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Re: Working Magnetic Motor on you tube!!!
« Reply #114 on: January 06, 2008, 10:21:45 PM »
Quote from: TheOne

What is that!!

Rogowski coil?

CLaNZeR

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Re: Working Magnetic Motor on you tube!!!
« Reply #115 on: January 06, 2008, 10:30:42 PM »
Quote from: tbest
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

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Re: Working Magnetic Motor on you tube!!!
« Reply #116 on: January 06, 2008, 10:33:53 PM »
[EDIT] Deleted.
« Last Edit: January 09, 2008, 11:29:03 PM by Groundloop »

vipond50

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Re: Working Magnetic Motor on you tube!!!
« Reply #117 on: January 06, 2008, 10:37:13 PM »
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

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Re: Working Magnetic Motor on you tube!!!
« Reply #118 on: January 06, 2008, 10:41:08 PM »
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 :(

********************

@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.

*************

MeggerMan

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Re: Working Magnetic Motor on you tube!!!
« Reply #119 on: January 06, 2008, 10:53:11 PM »
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