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Availbale Products, Material- and Service suppliers => Actual Products => Topic started by: futuristic on June 28, 2011, 12:45:49 PM

Title: Magnetic bearings
Post by: futuristic on June 28, 2011, 12:45:49 PM
In some other thread Dave45 posted link to this video: http://www.youtube.com/watch?v=2R4QQmCY4JU

I started this new topic because I was afraid that this info would be lost in that (non bearing related) thread.
I think that this would be great bearings for our diy motors.

You can read more about his technology here: http://www.magnetal.se

And on their website is also link to thesis containing all the info one needs to make the bearing:
http://www.magnetal.se/Dokument/PhDThesis.pdf

Have fun,
Frenky
Title: Re: Magnetic bearings
Post by: e2matrix on June 28, 2011, 06:47:08 PM
IIRC the web site made it sound like 5000 rpm was about the minimum these will operate well at.  That would be too fast for the home built Muller/Dynamo for a couple reasons.  One there is evidence the 'magic' speed is around 1200 rpm.  The other is most units would blow apart dangerously at 5000+ rpm unless built to extreme precision.  I think there are other types of magnetic bearings that would work at slower speeds but that was the impression I had from skimming this web site. 
Title: Re: Magnetic bearings
Post by: teslaalset on June 28, 2011, 09:27:02 PM
Have a look at some bearings I suggested earlier here: http://www.overunity.com/index.php?topic=10716.90 , reply #97
Pretty simple to implement.
I've seen some youtube videos of a guy using these in some sort of way, I'll have a look whether I can find those.

[update]
Here's one from Lidmotor: http://www.youtube.com/watch?v=PjmJX4thhGA
Another one from Dadhav: http://www.youtube.com/watch?v=VHJRWL42rCU
Title: Re: Magnetic bearings
Post by: futuristic on July 04, 2011, 12:37:58 PM
I have tested your suggested design.
The magnet in the middle will instantly jump in the center of one of the ring magnets.
I think that Mendocino setup should work better. I will try that because it's tested to work...