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

[callanan]

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.

Yes I agree. But with just one magnet as I am currently using, the power efficiency is unlike anything I have ever seen and I have made a quite a few motors in my time. So it is quite mindblowing for me to think that this efficiency can yet still go higher with better design. As it is, with only two coils my current motor gets into a runaway mode and the only thing stopping it is the inability of the reed switch to switch any faster. I do have concerns in regard to the dangers of runaway when I implement proper electronic fast switching.

Even with the reed switch, when it hits a rapid accelleration point whilst tuning it gets pretty scary and my next move is to get some good strong tape and tape down those magnets. The disbelief comes when you see it do this and also see that there is no more increase in the input power being drawn...

Regards,

Ossie

[gyulasun]

Hi Ossie,

Would you mind checking the current draw when you try to decelerate a little bit the rotor by your hand? (using a piece of wood actually, not directly your fingers... )   I am curious and yes I want to build also but can do it in a few weeks time in January.
I have not seen any comment on current consumption when the rotor is actually loaded but I think it would be a useful test.

Thanks, Gyula

[interestedinou]

Hi All,

As the mechanics are bi-directional with timing the only issue as to rotational direction, the BEMF resulting when the coil/s are turned off ADDS to the rotation and hence efficiency.  Don't need to harvest it, it is already used if diode across the coil!!!!!!!  It is a moot issue.  Being married to two women (one after the other ha)  for 42 years and 4 kids has made me a verry mellow fellow.  Egos here/a persons competance/ slip ups, all part of life, don't mean "nuttin".  Ideas, theories, results, and HAVING FUN AND SAYING WOW WOW when you see something work and then trying to figure out why when the workings turn your "theoretical" world upsides down is where it is at!!!!!
ALL, keep up the good work!!  And whomever the pest is that keeps locking the site down, simply quit it.......

Respectfully
Ben

Would you please post a simple drawing of what you mean by a diode across the coil?

Do you mean a diode right before the coil that blocks the flyback from going back to the positive terminal?

[Reincarnate]

@Reincarnate,

Can you point to a link where Thane Heins'motor is described in more detail?

One of the longest threads ever created here was by Thane. Here is more from youtube:

http://www.youtube.com/user/ThaneCHeins

If you understand how Thanes device works and have a close look at the Orbo and you see EXACTLY the same thing except a pulse motor and toroids instead of a coaxial coil.

Why not just replicate thane's device - he gives all the info. you need and it works as as stated.

[Groundloop]

All,

I have tried a yellow/white Iron Powder core. The current needed to saturate
the core was so high that my hot glue melted. What kind of core material
is the best to use?

Groundloop.