STEORN DEMO LIVE & STREAM in Dublin, December 15th, 10 AM

[captainpecan]

@ Ossie,
Thanks for the info, it is quite helpful.  Maybe I missed it somewhere, but have you stated the size of wire and number of turns (approximately) you have in your toroids?  If I had to guess, it kind of looks like your using 24 or 26 gauge wire in the picture, but I really cant tell for sure.  I did however use 20 gauge on my, which of course allows much less turns before it is filled.  It does explain my excessive current draw, I may have been looking at this wrong then. I was going for thicker wire, so a bit more current could saturate that core better.  Looks like I've just gone to thick, because I think I just reinvented a heater for my lab!!!  Some of it could be because I am also using a pretty heavy duty car battery, and it's pouring in those amps.  I'll try adding some resistance, then I will get to winding another couple toroids I guess... 

[callanan]

People should know that Steorn eOrbo has two magnets right next to each other per side, not one magnet.

From what I have learnt from the test models I have made is that the motor will work with many different orientations of both the coils and magnets and even rotor. This is because the driving force of the rotor is due to the magnets attraction to the coil's core material and that's all. In regard to one magnet or two per toroid coil, I have found that when using one magnet with the coil's round face facing the magnet's round face, the magnet is attracted to only the side of the coil and not the centre of the coil.

To explain further, please see the following pictures. At these points the rotor cogs when not powered and left free. Because there is a hole in the core of the toroid coils there is nothing to attract the magnet in the middle of the coil. This does not effect the operation of the motor too much but from an engineering perpective it creates two attraction power points where the switching point will only trigger at one so one of the attraction power points is wasted in this design unless a more elaborate switching circuit is used that can switch on both of these points.

To get around this, you can simply use two smaller magnets to attract to a single point on the toroid at the top and the bottom of the coil's core. This is what Steorn appears to have done. The alternative is to orient the toroid coil such that it's face faces down so it is lying flat. This will cause only one attraction point when using one magnet but because the core is round, the attraction force to the magnet will be reduced and so the power output will be less. Steorn also showed this coil orientation but with a dual magnet rotor in it's last interection video.

Regards,

Ossie

[PaulLowrance]

It would be interesting to see the COP figures for 1 magnet and 2 magnet designs. Who knows, maybe Steorn discovered that only the 2 magnet design is cop>1.

[callanan]

Yes, this way with a backing plate you can increase the attraction forces onto the ferrite core.
So you have N and S facing coming from the 2 magnets attracting the ferrite core.

Yes, I agree. Two magnets top and bottom, one N and the other S, will only result in one very strong attraction point. This should increase the power output sigificantly but will mean that you will need another rotor on the shaft for a generator with standard single magnets. This is exactly what Steorn has done so it appears that we now have all of their demonstration motor engineering principles understood.

The design is fairly simple now that all of this is understood. But I must say that I am surpsrised that there are only a few replications so far. With all the efforts and replications of some complex and crazy pulse motor designs done in the past, myself included, there is no reason I can see why people aren't bothering to replicate this motor apart from aparent disbelief. The irony is, "disbelief" is precisely the word to describe it when you get it to work...

Regards,

Ossie

[hartiberlin]

It would be interesting to see the COP figures for 1 magnet and 2 magnet designs. Who knows, maybe Steorn discovered that only the 2 magnet design is cop>1.

Well, with 2 magnets and an iron backing plate inside the rotor you just use then the 2 poles of the magnets to attract the ferrite toroidal core, instead of just using only one pole.
So the attraction forces are just doubled .

In the design Ossi and JL Naudin are showing,
the backside of the magnets, that are glued to the wheel
don´t attract the ferrite, so these forces are lost.

With an iron backing plate and 2 magnets in N-S configuration
as Steorn did it, you just can double the forces
and use the permanent magnets more useful (efficient).

Regards, Stefan.