Magnet motor in Argentina

[silverdragonrs]

just an idea but why dont we design molds to be made by emachineshop instead of actual peices.... this way we can reproduce the parts as needed and save some money since most of the parts on this device repeat themselves.

also the more i look at this device (peice by peice) the more detail i see being needed... and the less likely i see myself "rednecking" a prototype. I will continue to try but will be glad to assist in a group effort as well.

I am not sure how I can help so just let me know.

I have over two hundred old hard drives that are only 170- 500 MB so useless. I am taking them apart right now if anybody wants some of the parts (disks, motor, magnets, case) just email me and I'd be glad to share.

I am trying to find a magnet that is "polorised through its center" as mentioned before because i think this could work as well in the rotor. does anyone know of a disk magnet that meets the criteria? exp. speaker magnet?

and has anyone figured out if we can leave the magnets uncut? if we can't then does anyone know what cuts to make for this device? I don't quite understand how this part works.

danny

[jaybird]

What software is everyone using to open the FEMM files?

  I would be interested in checking them out also... As a side note, I havent had much luck with a normally magnetized (thru thickness) ring magnet setup the way that you would expect it to work, so the ring magnet must be magnetized thru diameter, or cut in 1/2, 1/3 etc. (havent been able to do that yet, ruined 2 trying tho!)

Thanks
JayBird

[hartiberlin]

Okay, I still had time to do it now,
here are the pics from my simulation.
I have used a pretty small mesh inside the
airgap and have put another center circle into the airgap,
this gives the best true simulation results of the forces.
So if you want to try my FEMM files,
put the red marking for the force calculation integral
onto the center circle in the airgap.

Now it would be nice, if a better FEMM pro can do a LUA
animation with the stator magnets going up and down
one by one and also trying to see, if the torque force on the rotor
is bigger than the force needed to push the last stator magnet
again into the circle.
Many thanks.
Regards, Stefan.
P.S: I have put the origin into the center of the rotor, so the torque
display in the pics is the real torque onto the magnetrotor and it is
pretty huge !

[hartiberlin]

FEMM simulation program can be downloaded freely here:
http://femm.foster-miller.net/

[hartiberlin]

I have downloaded now the
www.emachineshop.com

CAD software and played a short time with it.
It is not bad, but one needs some
time to get used to it.
It can also import AutoCad DXF files !

So, maybe we only need to design the difficult parts
like the rotor cap-lid and the stator magnet holders
with it and for the other parts use
cheap standard parts as ball bearings and rotor
axis etc...