Magnet Motor from Argentina, part2

[gn0stik]

"But you need to have e.g. north pointed inward to the axis , so
the polarisation must be 90 degrees to your current polarisation !
So it is no wonder, that you don?t have big forces
onto your rotor..."

A north pole is pointed into the rotor. I could turn the stator magnets 90 degree and increase the flux that is directed to the rotor. But I was having problems keeping the stators down. Perhaps I could cut the corners with the tile saw to reduce the interference. I think I saw this in Torbay designs.

yessir that is a primary component of the torbay motor design. The shape of the magnets is critical according to the patent papers that are on the last page of the first thread I believe. Torbay says that two principals drive his machine, the lifting of the stators, which keeps the motors in repulsion from behind, and the shape of the magnets which reduce interference by adjacent stators.

Also just having a topcap that would limit the upward travel of the stator magnets would help reduce the force it took to shove them back down. They only have to travel half the magnet face's distance upward to sufficiently create the imbalance. A small roller on the top of your stator mags would probably help reduce friction on the topcap as they will be pressing against it pretty hard until they shoved back down by the ramp, unless you cut the sides to the angle as specified by torbay. 

Also your magnets seem to be a little long, I think they should be much shorter to reduce the amount of magnet surface (and hence flux)opposing adjacent stators. Perhaps 1/4 as long(on the side).

____________________
\              N              /
\________S________/    <---- like that.
 

[eavogels]

Hi.
I really don't want to confuse anybody by showing a device that has a rotor magnet that is different magnetized than the original Torbay patent. But the first proof of concept makes that I want to show the big torque I get. The clip shows a 'Fred Flinstone'-style device where I mounted the stator magnets on pieces of iron. At 11 o'clock you see 2 magnets that are slightly higher mounted. The distance between stator magnets is chosen so that lifting and bringing down in line is not too heavy and when I'm going to mount the stator magnets on arms, with additional weights to make lifting and sinking easier I think I have to add a considerable load to the rotor to bring speed down.
The rotor magnets I used are at: http://www.fdp.nu/demo/fdp_neo_arc.gif

I?ll let the moderator decide if the video should be here or not. He may delete this.

[Jdo300]

Hi Eric,

This is an interesting way to do this. Try it with the lifting arms next to see if the torque you are getting will be enough to lift the stators.

God Bless,
Jason O

[gn0stik]

Wow, it turns a full 180 degrees out. It's in repulsion on one end and attraction on the other until the poles are on either side of the lifted mags. If you put your lifter ramp at 90 degrees counter clockwise to the peak of the "arch" on that set up, you'd have pretty good travel time, and they'd be getting lifted at mid "stroke" so to speak, so that it would be at maximum rpm that way. To increase torque, shorten that to say 90 degrees, but this would decrease rpm. Once you have the lifting arms built on hinges or something, then you can determine the force needed to force the stators down (seems to be the sticking point.), and adjust the lifting ramp to the appropriate torque level.

By the way, how did you encase the rotor mags in that epoxy resin? That's sweet.

[eavogels]

Hi.
I will start with only one arm, that is going to lift 2 magnets at once. I must figure out first how much force is needed to bring the magnets down and how much (little) the magnets have to be lifted to get any torque at all. Adding an adjustable pressure spring to keep the arm down will help also. Until I do some more tests I have the feeling that the device can work with just one arm. Because when all stator magnets are in line, there is very little friction and lifting 2 magnets is really throwing the 1,5 kilo rotor to the opposite side.

I milled the plexiglas box for the rotor magnets.
Eric.